5000 Plus MCQs for Lab Technician and Technologists are designed to test the knowledge and proficiency of laboratory professionals who work in the field of clinical laboratory science. These questions cover a wide range of topics related to laboratory science, including anatomy, physiology, microbiology, chemistry, and hematology.
201 to 250 MCQs for Lab Technician and Technologist Exam Preparation
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Questions 201 to 250
Glassware used to measure 24-hour urine volumes is a:
- a) Volumetric flask
- b) Beaker
- c) Erlenmeyer cylinder
- d) Graduated cylinder
- e) Safety bulb
Glassware used to make 100 ml of a 12% solution is a:
- a) Volumetric flask
- b) Beaker
- c) Erlenmeyer cylinder
- d) Graduated cylinder
- e) Safety bulb
A suction device used to draw up liquids is a:
- a) Volumetric flask
- b) Beaker
- c) Erlenmeyer cylinder
- d) Graduated cylinder
- e) Safety bulb
The pipette with a bulged-out portion in the middle is a:
- a) Mohr pipette
- b) Pasture pipette
- c) Serological pipette
- d) Volumetric pipette
- e) Micro-pipette
Which piece of glassware would not give critical measurement:
- a) Volumetric flask
- b) Beaker
- c) Erlenmeyer cylinder
- d) Graduated cylinder
- e) Safety bulb
The durable material used to make heat resistant glassware is:
- a) Polyethylene
- b) Soda lime
- c) Polystyrene
- d) Borosilicate
- e) Polyvinyl chloride
Solid crystals of potassium oxalate are added to distilled water in a container. What term would describe the potassium oxalate?
- a) Solution
- b) Solvent
- c) Solute
- d) Reagent
- e) Both “a” & “c” Options
The destruction of all micro-organisms including spores is called:
- a) Sanitation
- b) Antisepsis
- c) Sterilization
- d) Disinfection
- e) Asepsis
A µg is a unit to describe:
- a) Time
- b) Volume
- c) Distance
- d) Weight
- e) Length
A pH of 2 is _____ than a pH of 5:
- a) 1000 times more acidic
- b) 100 times more acidic
- c) 2 times less acidic
- d) 20 times less acidic
Cells in a hypertonic solution will:
- a) swell and burst
- b) dehydrate
- c) hemolyze
- d) not be affected
- e) stop mitosis
The solution used to fix a pap smear is:
- a) wright stain
- b) hematoxylin
- c) physiological saline
- d) cytospray
- e) methylene blue
Blood for an RBC count must be prepared from:
- a) EDTA blood
- b) citrated blood
- c) heparinized blood
- d) oxalated blood
- e) clotted blood
Which reagent is not routinely used to preserve tissue in a life-like manner:
- a) formic acid
- b) Zenker’s fluid
- c) 40% formaldehyde dissolved in water
- d) Bouin’s fluid
- e) 10% formalin
Which piece of histology equipment is not temperature dependent:
- a) wax
- b) tissue processor
- c) microtome
- d) embedding center
- e) water bath
A biopsy is:
- a) a removal of biological fluid
- b) the removal of an organ
- c) a post mortem examination
- d) excision of a representative tissue sample
- e) a collection of blood
During tissue processing, what is the correct sequence of steps:
- a) clearing, dehydration, infiltration
- b) clearing, infiltration, dehydration
- c) dehydration, infiltration, clearing
- d) dehydration, clearing, infiltration
- e) embedding, sectioning, staining
Fixation is important in tissue processing because it:
- a) prevents cell morphology changes and shrinkage
- b) allows tissue to be examined in a life-like condition
- c) facilitates the staining process
- d) Options “a” & “c”
- e) Options “a”, “b” & “c”
The liquid portion of blood remaining after a clot has formed is called:
- a) the buffy coat
- b) serum
- c) plasma
- d) lymph
- e) tissue fluid
Which test could not be performed on a serum sample:
- a) iron
- b) vitamin B12
- c) total lipids
- d) clotting factors
- e) potassium
The shape of a normal erythrocyte is described as:
- a) biconcave disc
- b) spherocyte
- c) polymorphonucleocyte
- d) thin column
- e) bull’s eye
Glucose results are correctly reported in:
- a) g/mmol
- b) mmol/L
- c) g/L
- d) g/ml
- e) g/dl
If a patient refuses to have a venipuncture done you should:
- a) tear up the requisition
- b) collect a urine sample
- c) politely ask a patient to come back next week
- d) restrain the patient and proceed with the venipuncture
- e) notify the patient’s physician
Which statement is false when performing a venipuncture:
- a) the vein is entered at a 15-20 degree angle
- b) the tubes are pushed onto the needle with the thumb of the strongest hand
- c) the bevel of the needle is pointed up when entering the vein
- d) the tourniquet is removed before withdrawing the needle
- e) the patients arm is cleansed before palpating the vein
A biohazardous container is used to discard:
- a) lancets
- b) needles
- c) band-aid wrappers
- d) Options “a” & “b”
- e) Options “a”, “b” & “c”
Which needle gauge corresponds with the smallest needle size:
- a) 18
- b) 20
- c) 21
- d) 22
- e) 23
The vacutainer tube which is used to collect and separate serum is the:
- a) red
- b) green
- c) lavender
- d) light blue
- e) SST
If a lavender top, plain red top, grey top, and light blue top tubes are collected, what is the order of draw:
- a) they can be collected in any order
- b) plain red top, lavender, blue, grey
- c) blue, plain red top, grey, lavender
- d) grey, blue, lavender, plain red top
- e) light blue, plain red top, lavender, grey
The tourniquet is:
- a) applied very tightly to the arm
- b) used to increase venous fill
- c) applied about 6-8? above the elbow
- d) tied in a knot to keep it on securely
- e) released after the needle is withdrawn
If a patient faints during a venipuncture, you should:
- a) call the physician at once
- b) remove the needle and attend to the patient
- c) yell loudly at the patient to keep him conscious
- d) continue the procedure until all blood is collected
- e) start artificial respiration immediately
What vein/veins is not used to obtain a venous blood sample:
- a) basilica vein
- b) cephalic vein
- c) medial cubital vein
- d) femoral vein
- e) veins on the back of the hand
A blood specimen collected in a heparinized tube is centrifuged. It will separate into:
- a) serum and clot
- b) plasma and clot
- c) serum and plasma
- d) plasma, buffy coat, RBC
Hemolysis may result from:
- a) using a 25-gauge needle on an adult
- b) vigorously shaking the blood specimen
- c) refrigerating the vacutainer before use
- d) leaving the tourniquet on for 3 minutes
- e) all of the above
The test procedure that uses a Westergren tube is:
- a) erythrocyte sedimentation rate
- b) hematocrit
- c) reticulocyte count
- d) microhematocrit
- e) differential
Latex gloves protect the lab employee from:
- a) accidental needle puncture
- b) microtome injury
- c) patient aerosols
- d) body fluid
- e) all of the above
Which statement is false when setting up an ESR:
- a) it must be read in exactly one hour
- b) it should be set up near a centrifuge
- c) the blood level must be at exactly zero
- d) it should be performed on fresh blood
- e) it must be set up in a vertical position
What is the normal temperature of a laboratory refrigerator:
- a) -4 C
- b) 0 C
- c) 3 C
- d) 20 C
- e) 37 C
The purpose of doing a differential is to:
- a) determine the proportion of RBC in whole blood
- b) count the number of WBC’s in whole blood
- c) determine the proportions of WBC’s in whole blood
- d) Both Options “c” & “e”
- e) diagnose anemia
Blood samples for cell counts must be thoroughly mixed immediately before testing to:
- a) prevent the clumping of platelets
- b) prevent the formation of small clots
- c) oxygenate the sample
- d) ensure even distribution of all blood components
- e) mix anticoagulant with the blood
An automated hematology cell count uses the principle of:
- a) diffusion
- b) color absorption changes
- c) high frequency sound waves
- d) changes in cell electrical currents
- e) light wave scattering
The maximum depth to perform a heel puncture on a newborn is:
- a) 1.5mm
- b) 2.0mm
- c) 2.4mm
- d) 2.8mm
- e) 3.0mm
The first drop of blood is wiped away after performing a skin puncture to:
- a) remove any pathogens that are present
- b) increase blood flow to the area
- c) remove the last traces of alcohol
- d) remove any excess tissue fluid
- e) Both Options “c” & “d”
What areas on an infant are suitable for skin puncture:
- a) any calloused areas of the foot
- b) the second or third finger on either hand
- c) the posterior curvature of the heel
- d) the lateral, flat portion of the heel
What laboratory department studies antigen-antibody reaction:
- a) Hematology
- b) Microbiology
- c) Immunology
- d) Biochemistry
- e) Coagulation
What tube would be drawn for ANA:
- a) Red
- b) Grey
- c) SST
- d) Green
- e) Light Blue
A disinfectant used on metal surface is:
- a) 10% formalin
- b) 2% glutaraldehyde
- c) 1% hypochlorite
- d) 70% isopropyl alcohol
- e) 15% iodine
What tube would be collected for a cross-match:
- a) lavender
- b) light blue
- c) green
- d) grey
- e) plain red top
Separated serum that is dark yellow to amber in color is termed:
- a) crenated
- b) lipemic
- c) jaundiced
- d) icteric
- e) hemolyzed
Which factor would interfere with the growth of a pathogen:
- a) appropriate nutrients
- b) darkness
- c) a moist environment
- d) an acidic pH
- e) a temperature of 37 C
A specimen is:
- a) material spread on a slide
- b) an amount of blood or urine
- c) a small sample taken to represent the whole organism or system
- d) a colony of micro-organisms growing on solid medium
- e) a technique used to microscopically examine urine
Answer Key Summary
The questions are typically designed to assess the technical skills and knowledge required for the laboratory profession, including the ability to analyze laboratory test results, perform laboratory procedures, and maintain laboratory equipment.
To prepare for these MCQs, candidates should have a thorough understanding of the key concepts and principles of laboratory science. They should also be familiar with common laboratory equipment and procedures, as well as laboratory safety protocols.
Candidates may also benefit from studying specific laboratory science textbooks or taking online courses that cover the material tested in the MCQs. Additionally, practicing sample MCQs and reviewing the answers can help candidates identify areas where they may need to improve their knowledge or skills.
Overall, the MCQs for lab technologists are designed to be challenging and comprehensive, requiring candidates to demonstrate a high level of proficiency in the field of laboratory science.
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