Question 1

A client's lab values reveal Hgb 12.5, WBC 6500/cu mm, K+ 1.9, uric acid 7.0, Na+ 136, and platelets 178,000/cu mm. The nurse evaluates that the client is experiencing which of the following?

Accepted Answer

Answer reason: The potassium level is critically low (K+ 1.9 mEq/L), which directly indicates a severe potassium deficit and poses high risk for dysrhythmias and neuromuscular weakness. Sodium is normal (Na+ 136), so hypernatremia is not supported. WBC (6500/cu mm) and platelets (178,000/cu mm) are within normal range, making leukopenia and myelosuppression unlikely based on these labs. Hemoglobin is also within expected limits, further arguing against marrow suppression.
Category reason: This item tests interpretation of laboratory electrolyte values (especially potassium) and recognition of the corresponding diagnosis, which aligns best with Laboratory Values & Diagnostics rather than nursing intervention prioritization.

Question 2

........... will interfere with the chemical determination of bilirubin giving high variable results?

Accepted Answer

Answer reason: b- hemoglobin Hemoglobin in the sample (often from hemolysis) can cause spectral/chemical interference in bilirubin assays, leading to falsely elevated or erratic readings depending on the method. Its strong absorbance in the visible range overlaps with bilirubin measurement wavelengths in many colorimetric techniques. This interference is a well-recognized pre-analytical/analytical issue, so minimizing hemolysis and rejecting grossly hemolyzed specimens improves accuracy.
Category reason: This item tests knowledge of laboratory assay interference affecting bilirubin measurement, which fits Laboratory Values & Diagnostics rather than nursing care decision-making.

Question 3

Which stool examination technique is used to detect ova and cysts?

Accepted Answer

Answer reason: A wet preparation (direct smear) of stool with saline and/or iodine is routinely used to identify intestinal parasite ova and protozoal cysts under the microscope. KOH mount is primarily used for detecting fungal elements in skin/hair/nails, not stool parasites. Benedict’s test detects reducing sugars and is used for carbohydrate malabsorption screening. Gram stain is mainly for bacterial classification and is not the standard method for ova and cyst detection.
Category reason: This question tests selection of an appropriate stool diagnostic method for identifying parasites, which is a laboratory/diagnostic technique rather than a nursing care decision.

Question 4

Which anticoagulant is commonly used for complete blood count (CBC) testing?

Accepted Answer

Answer reason: EDTA is the standard anticoagulant in lavender-top tubes used for hematology tests like the CBC because it chelates calcium to prevent clotting while best preserving cellular morphology. This allows accurate counts of RBCs, WBCs, and platelets on automated analyzers and peripheral smears. Sodium citrate is preferred for coagulation studies (e.g., PT/INR, aPTT) due to its reversible anticoagulation and specific blood-to-anticoagulant ratio. Heparin is mainly used for plasma chemistry or blood gases, and fluoride is used for glucose preservation (often combined with an anticoagulant).
Category reason: This question tests knowledge of which collection-tube anticoagulant is used for a specific laboratory test (CBC), which falls under Laboratory Values & Diagnostics rather than nursing interventions.

Question 5

Which of the following is the normal Calcium level in a patient?

Accepted Answer

Answer reason: Serum total calcium is typically maintained within a narrow reference range of about 8.5–10.5 mg/dL in adults, reflecting regulation by parathyroid hormone, vitamin D, and calcitonin. Values below this range suggest hypocalcemia (risking tetany, seizures, QT prolongation), while values above suggest hypercalcemia (causing weakness, constipation, nephrolithiasis, and dysrhythmias). Among the options, only this range aligns with the commonly accepted normal total calcium interval.
Category reason: This question tests recall of a normal laboratory reference range (serum calcium), which is a foundational lab/diagnostics knowledge area rather than a nursing intervention or prioritization decision.

Question 6

Population-focused nursing practice requires which of the following processes?

Accepted Answer

Answer reason: Population-focused nursing emphasizes assessing health patterns and determinants at the community level rather than primarily managing individual client care. Epidemiology provides the systematic method to measure incidence/prevalence, identify risk factors, and track outbreaks or trends. These data guide population-level planning, implementation, and evaluation of public health interventions. The other options are useful tools but are not the core overarching process that defines population-based assessment and action.
Category reason: The question tests foundational knowledge of population health methods (epidemiology) rather than a bedside nursing judgment or intervention, so it fits NursingScience. It aligns most closely with understanding diagnostic/measurement approaches used to assess and monitor community health status.

Question 7

Which cardiac marker raised first in myocardial infarction?

Accepted Answer

Answer reason: It rises earliest after myocardial injury (often within 1–3 hours) because it is a small cytosolic protein that rapidly diffuses into the bloodstream. However, it lacks cardiac specificity and can be elevated with skeletal muscle injury, so it is not preferred for definitive diagnosis. Troponins are more specific and stay elevated longer, while CK-MB and AST (SGOT) generally rise later than myoglobin.
Category reason: This question tests timing of biomarker elevation after myocardial infarction, which is primarily interpretation of diagnostic laboratory markers.

Question 8

The normal urine pH range is?

Accepted Answer

Answer reason: Normal urine is typically slightly acidic on average (around pH ~6) but can vary with diet, hydration, and systemic acid–base status. A physiologic range extending from mildly acidic to mildly alkaline is expected in healthy individuals. Values persistently very acidic (e.g., near 3) or very alkaline (e.g., ≥9) are unusual and may suggest pathologic states or specimen issues.
Category reason: This item tests knowledge of a standard urinalysis reference range (urine pH), which is a foundational laboratory value interpretation topic rather than a nursing intervention or prioritization scenario.

Question 9

Normal fasting blood sugar level should be?

Accepted Answer

Answer reason: Normal fasting plasma glucose in nonpregnant adults is typically in the euglycemic range (about 70–99 mg/dL), with values at or above 126 mg/dL on repeat testing supporting diabetes. The other ranges listed correspond to significant hyperglycemia and would not be considered normal fasting levels. Fasting glucose is a foundational lab value used to screen and help diagnose disorders of glucose metabolism.
Category reason: This item tests knowledge of a standard diagnostic laboratory reference range (fasting blood glucose), which fits Laboratory Values & Diagnostics rather than nursing intervention decision-making.

Question 10

A water barometer is being used to record the barometric pressure. The water within the barometer column has a meniscus formation. You would read the barometric pressure at the?

Accepted Answer

Answer reason: Water forms a concave meniscus in glass due to adhesion exceeding cohesion, so the true liquid level is taken at the lowest point of the curve. Reading at the top would systematically overestimate the column height and therefore the calculated pressure. This is the standard convention for aqueous solutions in calibrated columns to minimize parallax and improve measurement accuracy.
Category reason: This question tests correct measurement technique for a liquid column (meniscus reading) used in pressure measurement, which aligns with laboratory/diagnostic measurement principles rather than nursing interventions.

Question 11

A client's lab values reveal Hgb 12.6, WBC 6500cu.mm, K+ 1.9, uric acid 7.0, Na+ 136, and platelets 178,000cu.mm. The nurse evaluates that the client is experiencing which of the following?

Accepted Answer

Answer reason: A potassium level of 1.9 mEq/L is critically low and defines hypokalemia, which can cause muscle weakness, ileus, and dangerous cardiac dysrhythmias. Sodium 136 mEq/L is within normal range, so hypernatremia is not supported. WBC 6500/cu mm and platelets 178,000/cu mm are within typical reference ranges, and Hgb 12.6 is not markedly low, making leukopenia or myelosuppression unlikely based on these values.
Category reason: This item tests interpretation of electrolyte and CBC laboratory values to identify an abnormal finding, which fits Laboratory Values & Diagnostics rather than a nursing intervention/prioritization scenario.

Question 12

Which type of brain scan uses radioactive glucose to measure activity in the brain?

Accepted Answer

Answer reason: PET scanning uses a radiolabeled glucose analog (commonly FDG) to assess regional metabolic activity, which correlates with neuronal activity in the brain. CT and x-ray primarily show structural anatomy and do not measure glucose metabolism. MRI provides detailed soft-tissue imaging and can assess function with specific techniques, but it does not use radioactive glucose as the standard mechanism.
Category reason: This question tests knowledge of diagnostic imaging modalities and what each measures, which fits Laboratory Values & Diagnostics rather than nursing care decision-making.

Question 13

The improper order of draw can lead to ________.?

Accepted Answer

Answer reason: Improper order of draw can cause additive carryover from one tube to the next, altering specimen integrity (e.g., anticoagulants or clot activators affecting subsequent samples). This leads to inaccurate laboratory results and potential misinterpretation of the patient’s condition. Following the standardized order minimizes cross-contamination and reduces pre-analytical errors.
Category reason: This tests knowledge of phlebotomy collection sequence and pre-analytical specimen handling, which falls under laboratory testing principles rather than nursing judgment in a patient-care scenario.

Question 14

Inversion of the tubes is very important. How many times must a Blau tube be inverted?

Accepted Answer

Answer reason: a. 3-4 times Light blue (sodium citrate) coagulation tubes require gentle inversion a few times to adequately mix anticoagulant with blood while minimizing hemolysis and platelet activation. Under-mixing can lead to microclots and inaccurate coagulation results, while excessive inversions can increase pre-analytical error from cell trauma. Standard phlebotomy guidance teaches fewer inversions for citrate tubes compared with additive tubes like EDTA, aligning with the lower inversion count here.
Category reason: This question tests correct specimen handling for a specific blood collection tube and pre-analytical laboratory technique, which falls under Laboratory Values & Diagnostics rather than bedside nursing decision-making.

Question 15

Centrifugation separates the blood into two parts. What are the two parts that are centrifuged out to test?

Accepted Answer

Answer reason: Centrifugation separates whole blood into a liquid component and cellular elements; the liquid portion used for many laboratory assays is either serum or plasma depending on whether the sample was allowed to clot and whether anticoagulant was used. Serum is the fluid remaining after clotting (lacks fibrinogen), while plasma is obtained from anticoagulated blood (retains clotting factors). The other options are not the standard primary blood fractions produced/used from centrifuged blood specimens.
Category reason: This question tests understanding of how blood specimens are processed for laboratory testing and what components are obtained, which fits Laboratory Values & Diagnostics rather than bedside nursing interventions.

Question 16

The normal cholesterol level is?

Accepted Answer

Answer reason: Desirable total serum cholesterol for adults is generally considered to be below 200 mg/dL, with higher values categorized as borderline high (200–239 mg/dL) and high (≥240 mg/dL). Among the choices, the range that best fits the normal/desirable target centered under 200 mg/dL is 150–200 mg/dL. The other options start at or above 200 mg/dL, which corresponds to at least borderline elevation rather than normal.
Category reason: This item tests recognition of the normal/desirable reference range for a common lab screening value (total cholesterol), which is best classified under Laboratory Values & Diagnostics rather than nursing intervention decision-making.

Question 17

What is a normal adult blood pressure reading?

Accepted Answer

Answer reason: This value is commonly taught as the standard reference for normal adult blood pressure. Readings substantially above this threshold trend toward hypertension, while much lower values may indicate hypotension depending on symptoms and perfusion. The other options are either lower-than-typical reference values or meet a classic hypertension cutoff.
Category reason: This question tests recognition of a standard normal vital-sign reference value, which fits Laboratory Values & Diagnostics rather than a nursing intervention or prioritization scenario.

Question 18

Q.1250: The “normal platelet count range” (per microliter) is?

Accepted Answer

Answer reason: B) 1,50,000-4,50,000 Normal platelet count in adults is approximately 150,000–450,000/µL, reflecting adequate primary hemostasis capacity. Values below this range indicate thrombocytopenia and raise bleeding risk, while markedly elevated counts suggest thrombocytosis with potential thrombotic risk depending on etiology. The other ranges listed are either too low to be normal or far above expected physiologic values.
Category reason: This item tests recall of a standard normal laboratory reference range for platelets, which is part of interpreting CBC results and belongs to Laboratory Values & Diagnostics.

Question 19

Albumin Test Its concentration in the blood decreases in cases of

Accepted Answer

Answer reason: Albumin is synthesized by the liver, so impaired hepatic synthetic function (as in acute or chronic liver disease) leads to decreased serum albumin. While malnutrition and malabsorption can also reduce albumin over time, the most direct and classically tested cause among these choices is reduced hepatic production. Kidney pathology causes hypoalbuminemia primarily via protein loss (e.g., nephrotic syndrome), not “kidney infections,” making that option less accurate.
Category reason: This item tests interpretation of a lab value (serum albumin) and what conditions decrease it, which fits Laboratory Values & Diagnostics rather than a nursing intervention scenario.

Question 20

Albumin Test Its concentration in the blood increases in cases of

Accepted Answer

Answer reason: Fluid loss reduces plasma water, causing hemoconcentration and an apparent rise in measured serum protein levels, including albumin. This is a relative increase due to reduced volume rather than increased hepatic production. By contrast, “nervous shock” is not a typical direct cause of elevated serum albumin, and exogenous IV albumin is a treatment-related situation rather than the classic physiologic lab interpretation being tested.
Category reason: This question tests interpretation of when a laboratory value (serum albumin concentration) increases, which fits Laboratory Values & Diagnostics rather than nursing interventions or prioritization.

Question 21

Jaffer, a 80-yr-old man visits his physician because of nocturia, urinary urgency, and a feeling that he cannot completely empty his bladder. He voids 6x per day and 4x per night. He has a strong desire to void, and when he goes to pee he can only do so with a weak stream and straining. Digital rectal exam shows a firm, enlarged prostate measuring approx. 30 grams. Post-void residual by ultrasound is 300 mL. Bone scan shows multiple osteoblastic lesions in the vertebral bodies. Which of the bone metabolite elevations below is most strongly associated with Jaffer's lesions?

Accepted Answer

Answer reason: Osteoblastic (bone-forming) metastases classically occur with prostate cancer and increase osteoblast activity. Alkaline phosphatase is produced by osteoblasts, so levels rise with increased bone formation and bone turnover in osteoblastic lesions. PSA and prostatic acid phosphatase reflect prostate tumor burden/activity rather than the bone metabolic response. Tartrate-resistant acid phosphatase is a marker of osteoclast activity and is more associated with osteolytic processes.
Category reason: This question tests interpretation of laboratory markers associated with osteoblastic bone metastases and differentiating bone turnover enzymes from prostate tumor markers, which fits Laboratory Values & Diagnostics.

Question 22

A nurse is providing teaching to the parents of an infant who is to undergo pilocarpine iontophoresis Testing for Cystic Fibrosis. Which of the following statements should the nurse include in the teaching?

Accepted Answer

Answer reason: b. The test will measure the amount of water in your baby's sweat Pilocarpine iontophoresis is the sweat test used to evaluate for cystic fibrosis by stimulating sweat production and then analyzing sweat composition. In CF, the key abnormality is elevated sweat chloride (and sodium) due to defective CFTR-mediated reabsorption in sweat ducts. Urine protein measurement, IV insertion, and fasting are not required for this diagnostic test. The option is imprecise (it measures electrolytes, not “water”), but it is the only choice that correctly links the test to sweat measurement.
Category reason: This question tests understanding of a specific diagnostic test (pilocarpine iontophoresis/sweat testing) and what it measures in suspected cystic fibrosis, which aligns best with Laboratory Values & Diagnostics rather than nursing interventions or prioritization.

Question 23

A client with cancer is admitted to the oncology unit. Stat lab values reveal Hgb 12.6, WBC 6500, K+ 1.9, uric acid 7.0, Na+ 136, and platelets 178,000. The nurse evaluates that the client is experiencing which of the following?

Accepted Answer

Answer reason: The potassium value of 1.9 mEq/L is critically low and indicates a severe electrolyte deficit. Sodium is normal (136 mEq/L), WBC is within normal range (6500/µL), and the hemoglobin and platelet count are not suggestive of the listed alternative conditions. Such a low potassium level can cause muscle weakness, ileus, and dangerous cardiac dysrhythmias, making this the most clearly supported diagnosis from the labs.
Category reason: This item tests interpretation of serum laboratory values to identify an electrolyte abnormality, which best fits Laboratory Values & Diagnostics rather than a nursing-judgment intervention scenario.

Question 24

What must be considered for pediatric heart donors that have been breastfed in the 12 months prior to donation?

Accepted Answer

Answer reason: c. Analysis of mother's risk for transmissible disease Breastfeeding can transmit certain infections from mother to infant, so donor eligibility assessment must include evaluating maternal risk factors for transmissible diseases. This helps address window-period infections and exposures that may not be apparent from the infant’s history alone. The screening focus is on infectious risk assessment rather than feeding duration or maternal nutrition.
Category reason: This question tests donor screening and infectious-disease transmission risk considerations tied to serologic testing context in transplantation, aligning best with Laboratory Values & Diagnostics rather than a nursing care intervention.

Question 25

What is the normal adult blood glucose (fasting)?

Accepted Answer

Answer reason: Normal fasting plasma glucose in nonpregnant adults is typically defined as

Question 26

A public health nurse is analyzing data from a recent outbreak of influenza in a community. Which measure best indicates the spread of the disease?

Accepted Answer

Answer reason: A. Incidence rate Incidence measures the number of new cases occurring in a population over a specified time period, which is the key indicator of ongoing transmission during an outbreak. In contrast, prevalence reflects all existing cases at a point/period and is influenced by both incidence and duration of illness. Mortality focuses on deaths, not transmission dynamics. “Morbidity” is a broad concept of illness burden and is less precise than incidence for measuring spread.
Category reason: This question tests epidemiologic measures (incidence vs prevalence vs mortality) used to interpret outbreak data, which is a foundational diagnostics/surveillance concept rather than a bedside nursing intervention.

Question 27

A nurse is investigating a tuberculosis (TB) outbreak in a homeless shelter. Data shows 10 new cases among 200 residents over 6 months. Question: Calculate the incidence rate of TB per 1,000 residents.?

Accepted Answer

Answer reason: B. 50 per 1,000 Incidence proportion over the stated period is calculated as new cases divided by the population at risk: 10/200 = 0.05. Converting to a rate per 1,000 residents gives 0.05 × 1,000 = 50 per 1,000. The 6-month timeframe is already incorporated because the question asks for incidence over that observed interval, not an annualized rate.
Category reason: This is a quantitative epidemiology calculation (incidence per population) rather than a nursing intervention or prioritization scenario, fitting best under diagnostic/measurement concepts.

Question 28

Which type of study is most appropriate to identify risk factors for heart disease in a community?

Accepted Answer

Answer reason: A cohort design follows a disease-free population over time to observe incident heart disease and relate it to baseline exposures (e.g., smoking, lipids, hypertension), allowing estimation of risk (relative risk) and supporting temporality between exposure and outcome. This makes it well-suited for identifying risk factors at the community level. Cross-sectional studies measure exposure and outcome at one time point and cannot establish temporal sequence. Case-control studies are efficient for rare diseases but start with outcomes and are more prone to recall bias when assessing past exposures.
Category reason: This question tests epidemiologic study design selection (how to identify risk factors in a population) rather than nursing interventions, prioritization, or direct patient-care decisions, so it fits foundational health research/diagnostics concepts.

Question 29

A client with cancer is admitted to the oncology unit. Stat lab values revel Hgb 12.6, WBC 6500, K+ 1.9, uric acid 7.0, Na+136, and platelets 178,000. A nurse evaluates the client is experiencing which of the following?

Accepted Answer

Answer reason: B. Hypokalemia The potassium level is critically low (K+ 1.9 mEq/L), which indicates a severe electrolyte deficit. This abnormality is far more significant than the other values provided, which are within or near typical reference ranges (e.g., sodium 136 mEq/L, WBC 6500/µL, platelets 178,000/µL). Severe potassium depletion increases risk for dysrhythmias, muscle weakness, and potentially respiratory compromise, making it the best interpretation of the labs.
Category reason: This question primarily tests interpretation of electrolyte and CBC laboratory results to identify the underlying abnormality, which falls under Laboratory Values & Diagnostics rather than nursing care prioritization.

Question 30

A nurse reviews a patient's lab results. Which value is outside the normal range?

Accepted Answer

Answer reason: B. Potassium 5.2 mEq/L Typical adult serum potassium is about 3.5–5.0 mEq/L, so 5.2 mEq/L is mildly elevated (hyperkalemia). The other listed values fall within common reference ranges: hemoglobin ~12–16 g/dL (female) or ~13.5–17.5 g/dL (male), sodium ~135–145 mEq/L, and fasting glucose ~70–99 mg/dL. Mild hyperkalemia is clinically important because rising potassium can impair cardiac conduction and increase dysrhythmia risk.
Category reason: This item tests recognition of normal versus abnormal laboratory reference ranges, which is primarily a foundational diagnostics/lab-values knowledge task rather than a nursing intervention or prioritization scenario.

Question 31

Which symptom indicates hypokalemia?

Accepted Answer

Answer reason: Low potassium reduces skeletal muscle cell membrane excitability and impairs normal neuromuscular transmission, leading to generalized weakness, fatigue, and sometimes cramps. Hypokalemia also predisposes to ileus and cardiac dysrhythmias (often with ECG changes such as flattened T waves and U waves). Bradycardia is not the classic primary symptom compared with weakness, and hypertension/tachypnea are not typical direct manifestations of low potassium.
Category reason: This question tests recognition of a clinical manifestation associated with an electrolyte abnormality (low serum potassium), which aligns best with Laboratory Values & Diagnostics rather than nursing interventions or prioritization.

Question 32

We say that a Filipino has attained longevity when he is able to reach the average lifespan of Filipinos. What other statistic may be used to determine attainment of longevity?

Accepted Answer

Answer reason: B. Proportionate mortality rate Proportionate mortality rate reflects the distribution of deaths by cause relative to all deaths and is often used to describe population health patterns alongside measures like life expectancy. As longevity improves, deaths tend to shift toward chronic/degenerative causes at older ages, changing the proportionate mortality profile. Age-specific and crude mortality rates mainly quantify death frequency in specific age groups or overall, but do not capture this epidemiologic shift as directly.
Category reason: This item tests interpretation of population mortality statistics used in public health/epidemiology, which aligns best with diagnostics and health-statistics measures rather than bedside nursing interventions.

Question 33

Which solution is commonly used for IV maintenance?

Accepted Answer

Answer reason: These are common crystalloid IV fluids used in routine maintenance depending on the clinical context. 0.9% normal saline and Ringer’s lactate are isotonic solutions frequently used for maintenance or replacement, while 5% dextrose can be used as a maintenance fluid to provide free water (and calories) once dextrose is metabolized. The choice among them depends on factors like electrolyte status, acid–base balance, and comorbidities, but each is commonly used in IV maintenance practice.
Category reason: This is a foundational question about common IV fluid types used for maintenance rather than a nursing judgment/prioritization scenario, aligning best with diagnostics/clinical fluids knowledge.

Question 34

This expresses the variability of the data in reference to the mean. It provides as with a numerical estimate of how far, on the average the separate observation are from the mean?

Accepted Answer

Answer reason: C. Standard deviation Standard deviation quantifies how dispersed individual data points are around the mean, representing the typical (average) distance of observations from that mean. Mode and median are measures of central tendency rather than variability. Frequency describes counts of occurrences and does not measure spread. Therefore, the statistic that matches the definition in the stem is the measure of dispersion around the mean.
Category reason: This question tests knowledge of a statistical measure (variability around the mean) used to interpret data and diagnostics-related results, which fits Laboratory Values & Diagnostics rather than nursing care decision-making.

Question 35

Which of the following communicate the results of the research to the readers. They facilitate the description of the data.?

Accepted Answer

Answer reason: They are standard tools for presenting research findings clearly and efficiently by organizing large amounts of data into a format that is easy to interpret. They highlight patterns, comparisons, distributions, and trends that may be difficult to grasp in narrative form. In research reporting, they directly support communication of results by improving readability and accuracy of data interpretation.
Category reason: This item tests understanding of how research results and data are presented and interpreted, aligning best with diagnostic/data presentation concepts used in healthcare research literacy.

Question 36

AFP is raised in all except?

Accepted Answer

Answer reason: Maternal serum AFP rises with open neural tube defects and open ventral wall defects because fetal proteins leak into the amniotic fluid and maternal circulation. Anencephaly and meningomyelocele are open neural tube defects and therefore typically elevate AFP. Gastroschisis is an open abdominal wall defect and also elevates AFP. Spina bifida occulta is a closed defect covered by skin, so AFP is usually normal.
Category reason: This question tests interpretation of a screening lab marker (maternal serum AFP) and which fetal anomalies are associated with elevated levels, fitting Laboratory Values & Diagnostics.

Question 37

Normal sodium level in blood is?

Accepted Answer

Answer reason: C. 135–145 mEq/L This range is the standard reference interval for serum sodium in adults and is used clinically to interpret fluid and electrolyte status. Values below it indicate hyponatremia, commonly associated with excess free water, SIADH, diuretic use, or adrenal insufficiency, and can cause neurologic symptoms due to cerebral edema. Values above it indicate hypernatremia, often from water loss (e.g., dehydration, diabetes insipidus) and can also produce neurologic impairment from cellular dehydration. The other options reflect clinically abnormal ranges rather than normal physiology.
Category reason: This item tests recall of the normal reference range for a common blood electrolyte, which is part of interpreting lab values and diagnostics rather than nursing interventions or prioritization.

Question 38

What is the normal range of potassium in blood?

Accepted Answer

Answer reason: B. 3.5–5.0 mEq/L This is the standard reference interval for serum potassium in most clinical laboratories. Values below this range indicate hypokalemia, which can cause muscle weakness and cardiac dysrhythmias, while values above it indicate hyperkalemia with potentially life-threatening arrhythmias. The other options represent abnormally low or high ranges rather than normal physiology.
Category reason: This question tests knowledge of a normal serum electrolyte reference range, which is part of interpreting laboratory values and diagnostics.

Question 39

The extent of burns in children are normally assessed and expressed in terms of?

Accepted Answer

Answer reason: Burn extent is standardized by estimating the percentage of body surface involved, which guides fluid resuscitation, transfer decisions, and prognosis. In children, age-adjusted tools (e.g., Lund and Browder chart) account for differing body proportions compared with adults. Burn depth is assessed separately from extent, and there is no universal 1–5 severity scale for burn extent.
Category reason: This question tests foundational knowledge of how burn size is measured and reported (TBSA), which is part of diagnostic/assessment principles rather than a nursing intervention or prioritization decision.

Question 40

Normal prothrombin time (PT) is?

Accepted Answer

Answer reason: c- 12-15 seconds Prothrombin time assesses the extrinsic and common coagulation pathways and is commonly reported in seconds (and often alongside INR). Typical reference ranges in many labs are around 11–13.5 seconds, and values like 12–15 seconds are a standard approximation used in exam settings. Minute-based options are physiologically implausible for a clotting assay and would indicate extreme coagulopathy incompatible with routine reference values. The 30–45 seconds option is closer to activated partial thromboplastin time (aPTT), not PT.
Category reason: This question tests knowledge of a normal coagulation laboratory reference range (PT), which is a diagnostic/lab values topic rather than a nursing intervention or prioritization scenario.

Question 41

What is the normal platelet count?

Accepted Answer

Answer reason: B. 1.5-4 lakh/mm3 Normal platelet count is approximately 150,000–400,000 per microliter (mm3), which corresponds to 1.5–4 lakh/mm3. Values below this range suggest thrombocytopenia with increased bleeding risk, while higher values suggest thrombocytosis with potential thrombotic risk depending on the cause. The other options are either too low for normal (e.g., 50,000–100,000) or above the usual upper limit (e.g., 5–6 lakh).
Category reason: This is a factual question about a normal reference range for a blood test, which fits Laboratory Values & Diagnostics rather than nursing decision-making.

Question 42

Which of these signs may NOT be REGARDED as a truly positive signs indicative of Dengue H- fever?

Accepted Answer

Answer reason: A. Prolonged bleeding time Dengue hemorrhagic fever is characterized by thrombocytopenia and evidence of plasma leakage, commonly reflected by rising hematocrit and clinical bleeding manifestations such as a positive tourniquet test (petechiae). A falling platelet count and increasing hematocrit are classic supportive findings for DHF. Bleeding time can be variable and is not a defining or reliably “truly positive” indicator compared with platelet trends, hematocrit rise, and tourniquet test findings.
Category reason: This item tests interpretation of diagnostic/clinical indicators (platelet count, hematocrit changes, tourniquet/petechiae) used to support dengue hemorrhagic fever, which fits Laboratory Values & Diagnostics rather than nursing intervention decision-making.

Question 43

A client with a mechanical mitral valve is on warfarin. Which INR value indicates effective anticoagulation?

Accepted Answer

Answer reason: C. 2.5 Mechanical mitral valves require a higher-intensity warfarin effect than many other indications because of high thrombosis risk. A therapeutic INR for a mechanical mitral valve is typically targeted around 2.5–3.5, and an INR of 2.5 falls within this effective range. An INR of 0.9 or 1.8 is subtherapeutic and increases risk of valve thrombosis and embolic stroke. An INR of 4.8 is supratherapeutic and substantially increases bleeding risk.
Category reason: This question tests interpretation of an INR lab value to determine whether warfarin therapy is therapeutic, which is primarily a diagnostics/laboratory-values knowledge task rather than a nursing action or prioritization scenario.

Question 44

The minimum residual chlorine required in drinking water is?

Accepted Answer

Answer reason: A free residual chlorine level around 0.2 mg/L at the point of delivery is commonly cited as the minimum to maintain ongoing disinfection and protect against microbial regrowth in distribution systems. Lower levels (e.g., 0.05 mg/L) may be insufficient to ensure bactericidal activity throughout storage and pipelines. Higher values like 0.5–1.0 mg/L can be used operationally, but they exceed the minimum requirement and may increase taste/odor complaints without being necessary as a minimum standard.
Category reason: This question tests a numerical public health/diagnostic standard for potable water disinfection rather than a nursing care decision, fitting Laboratory Values & Diagnostics within NursingScience.

Question 45

Which of the following study designs is best suited for investigating rare diseases?

Accepted Answer

Answer reason: It is the most efficient design for rare diseases because it begins with identifying affected individuals (cases) and comparing prior exposures to a control group, avoiding the need to follow very large populations to capture enough events. This makes it quicker and less costly than cohort studies when disease incidence is low. It also allows evaluation of multiple potential risk factors for a single rare outcome, typically estimating association using the odds ratio.
Category reason: This question tests epidemiologic study-design selection (methods used to investigate disease occurrence and associations), which is foundational biomedical/diagnostic knowledge rather than a nursing care decision.

Question 46

In a normal distribution, what percentage of values lie within ±1 standard deviation (SD) from the mean?

Accepted Answer

Answer reason: In a normal (Gaussian) distribution, the empirical rule states that approximately 68% of observations fall within one standard deviation of the mean. This corresponds to the central area between z = -1 and z = +1 on the standard normal curve. The other common benchmarks are ~95% within ±2 SD and ~99.7% within ±3 SD, making 68% the only option consistent with ±1 SD.
Category reason: This question tests understanding of the normal distribution and standard deviation proportions (empirical rule), which aligns best with interpreting diagnostic/measurement data and statistical norms rather than bedside nursing interventions.

Question 47

The temperature of the blood refrigerator is?

Accepted Answer

Answer reason: Blood components are stored in a dedicated blood bank refrigerator at controlled cold temperatures to preserve red cell viability, maintain appropriate pH and ATP levels, and limit bacterial proliferation. Standard practice keeps packed red blood cells around 1–6°C; a range of 2–6°C fits within accepted storage requirements. Warmer ranges increase metabolic degradation and contamination risk, while temperatures near freezing can cause hemolysis.
Category reason: This tests the correct storage temperature standard for blood products, which aligns with laboratory/blood bank handling and diagnostic services rather than patient-care prioritization.

Question 48

What is the first-line diagnostic test for TB in a child with persistent cough and poor weight gain under NTEP?

Accepted Answer

Answer reason: B. CBNAAT Under NTEP, upfront rapid molecular testing is recommended for presumptive pediatric TB because it detects Mycobacterium tuberculosis DNA quickly and simultaneously identifies rifampicin resistance. Smear microscopy (AFB) has low sensitivity in children due to paucibacillary disease and difficulty obtaining good sputum samples. Tuberculin skin testing supports TB infection but cannot reliably distinguish active disease and is not the primary diagnostic test. ESR is nonspecific and does not establish TB diagnosis.
Category reason: This question tests the recommended first-line diagnostic method for suspected tuberculosis under a program guideline, focusing on choosing an appropriate laboratory/diagnostic test rather than nursing interventions.

Question 49

What is the normal range of fasting blood sugar in adults?

Accepted Answer

Answer reason: Normal fasting plasma glucose in nonpregnant adults is typically in the ~70–99 mg/dL range, and many nursing exam references accept 70–110 mg/dL as the normal fasting range. Values at or above 126 mg/dL (on repeated testing) support diabetes, while 100–125 mg/dL indicates impaired fasting glucose (prediabetes). The other options are either hypoglycemic (40–70) or represent elevated/postprandial or target ranges rather than normal fasting values.
Category reason: This question tests interpretation of a standard lab reference range for fasting blood glucose, which falls under Laboratory Values & Diagnostics rather than nursing interventions or prioritization.

Question 50

What is the minimum window period for detecting HIV infection using 3rd generation ELISA?

Accepted Answer

Answer reason: B. 2–4 weeks Third-generation ELISA primarily detects anti-HIV antibodies (IgM/IgG), which require time after exposure to develop to detectable levels. The earliest reliable detection with this method is typically around a few weeks, earlier than older antibody-only assays but later than fourth-generation antigen/antibody tests or HIV RNA assays. Options suggesting only days are inconsistent with antibody kinetics, while 6–12 weeks or 6 months reflect longer, older-conservative windows rather than the minimum for third-generation ELISA.
Category reason: This question tests understanding of diagnostic test detection windows for HIV serology (ELISA), which is a laboratory diagnostics concept rather than a nursing care decision.

Train with a large NCLEX question bank and jump into a full exam-style simulator

Laboratory Values & Diagnostics NCLEX Practice Test

Continue Learning