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CSMLS Exam Questions With Correct
Answers Graded A+ Latest Updated 2025
Which is the most critical part of a biological safety cabinet? a. location in the laboratory b. high efficiency particulate air filter c. personal protective equipment d. power source available - correct answer.High Efficiency Particulate Air Filter what is the function of a catalyst in a anaerobic jar? a. keeps excessive condensation from forming b. keeps toxic levels of carbon dioxide from building up c. only works properly when damp d. combines residual oxygen with hydrogen to form water - correct answer.combines residual oxygen with hydrogen to form water what is a micron? a. 0.00001 mm b. 0.001 mm c. 0.01 mm d. 0.0001 mm - correct answer.0.001 mm what is 10^3 - correct answer. how much sodium chloride is required to make 300 ml of a 5 % solution? - correct answer.5/100 = x/300 = 5(300)/100 = 15 g which endocrine test is not performed on a 24 hour urine? a. VMA B. TSH C. BJ PROTEIN D. 17 KS - correct answer.BJ PROTEIN which is detected by a pregnancy test? a. prolactin b. FSH c. oxytocin d. HCG - correct answer.HCG
which urine chemical test results is associated with hepatic dysfunction? a. protein trace b. SG 1. c. glucose positive d. blood positive - correct answer.protein trace which backup test is used to confirm a positive protein in urine? a. ictotest b. ssa test c. clinitest d. acetest - correct answer.SSA test which analyze requires the use of a 24hr urine preservative? a. cortisol b. protein c. creatinine clearance d. VMA - correct answer.VMA which clinical condition is associated with increased uric acid levels? a. gout b. rectal cancer c. liver disease d. prostatic cancer - correct answer.gout wich organisms are demonstrated with ZN stain? a. ova and parasites b. yeast c. acid fast bacilli d. fungus - correct answer.acid fast bacilli which reagent is used as a dye trapping agent mordant in the Grams stain? a. lugols iodine b. grams iodine c. acetone alcohol d. crystal violet - correct answer.grams iodine which structure carries urine from the bladder to the outside of the body? a. renal pyramid b. urter. c. urethra d. vas deferens - correct answer.urethra which applies to the 24 hr urine collection? a. emptying bladder immediately before starting collection b. discarding the last specimen of the day c. never adding a preservative to the container
a. parasites and their ova b. bleeding hemorrhoids c. gastrointestinal pathogens d. colorectal cancer - correct answer.colorectal cancer which test is not associated with the Transfusion Science Lab? a. crossmatch b. group and rh c. glycolated hemoglobin d. direst antiglobin test - correct answer.glycolated hemoglobin which blood collection tube is collected for "crossmatch" a. lavender b. light blue c. gray d. green - correct answer.lavendar which part of the cells contain chromosomes? a. cytoplasm b. golgi apparatus c. organelles d. nucleus - correct answer.nucleus which is not a plasma protein? a. fibrin b. albumin c. alpha globulin d. fibrinogen - correct answer.fibrin which is not a leukocyte? a. basophil b. platelet c. monocyte d. neutrophil - correct answer.platelet which method will best prevent the spread of hospital acquired infections? a. place the patient in barrier precaution isolation b. always process samples in a biohazard cabinet c. proper hand washing technique in-between patients d. change lab coat between patients - correct answer.proper and washing technique in between patients which is not appropriate for the safe use of an autoclave? a. stapling the autoclave bags shut before loading b. using a spore control once a week c. daily cleaning of the strainer at the discharge channel
d. maintaining records of the time, temperature and pressure of each load treated - correct answer.stapling the autoclave bags shut before loading what is otitis? a. inflammation of the sinuses b. inflammation within the eye c. inflammation within the ear d. abnormal discharge form the nose - correct answer.inflammation within the ear what is tachycardia? a. heart attack b. rapid heart beat c. excessive blood pressure d. difficulty breathing - correct answer.rapid heart beat what is the study of tissue? a. cytology b. microbiology c. hematology d. histology - correct answer.histology you are unable to see or feel any of the usual veins on the arm of an obese client. which tissue is probably causing this difficulty? a. connective b.adipose c. collagen d. elastic - correct answer.adipose when should gloves be removed? a. a small tear appears in the materials b. visibly contaminated with blood c. answering the telephone d. all the above - correct answer.all the above which is meant by the term "intercostals" a. situated between vessels b. located between ribs c. found within a joint space d. pertains to rib cage - correct answer.located between the ribs which term describes a pain relieving drug? a. encephalic b. emetic c. latrogenic d. analgesic - correct answer.analgesic
b. during the afternoon c. immediately following a bowel movement d. before the patient gets out of bed - correct answer.before the patient gets out of bed what is the purpose of fixing bacterial smear? a. remove crystal violet stain repost b. adhere samples to the slide c. destroy all organisms d. remove excel protein - correct answer.adore samples to the slide what is the first step when medical lab technicians lab coat is on fire? a. stop drop and roll b. drag the MLA to the safety shower c. scary the MLA with water d. phone the fire department - correct answer.stop drop and roll why is specimen source require when submitting a swab for culture and sensitivity? a. alert the lab that the swab is infectious b. assit in billing c. assist in the selection of media d. ensure that the swabs don't get mixed up - correct answer.assit in the selection of media what should be done if a small clots are seen when making a blood smear? a. make the smear and note the slide that clots are present b. mix the blood specimens for one hour and then make the smear c. request a new specimens before doing the blood work d. add more anticoagulant to the blood tube, and then make the blood smear y? - correct answer.request a new specimen before doing the blood work what is precipitation? a. formation of insoluble particles b. flocculent mass in a beaker c. colloidal solution d. fine particles of tissue in a wax box - correct answer.formation of insoluble particles what is a biopsy a. removal of a biological specimen b. excision of a organ c. post mortem examination d. excision of a small piece of tissue - correct answer.excision of a small piece of tissue what happens to a leukocyte count during a bacterial infection? a. decreased b. increased c. normal
d. slightly decreased - correct answer.increased what is the most common acid fast stain for bacteria? a. hematoxylin and eosin b. grams c. giesma d. ziehl-neesen - correct answer.ziehl-neesen which is the largest artery in the body? a. carotid artery b. iliac artery c. aorta d. pulmonary artery - correct answer.aorta which vein is located in the arm? a. femoral b. jugular c.radial d. median cubital - correct answer.median cubital which patient is test for PKU a. newborn b. cancer c. mentally handicapped d. geriatric - correct answer.newborn what does mL measure? a. length b. volume c. area d. weight - correct answer.volume for accurate measurement where should a volumetric pipette be viewed? a. above eye level b. below eye level c. at an angel d. at eye level - correct answer.at eye level oxygen passes to the tissues from blood via which structure? a. lymphatic vessels b. arteries c. arterioles d. capillaries - correct answer.capillaries what is dH20? a. tap water
what is the dilution when 0.1 ml of a sample is added to a 2.9 ml of distilled water? - correct answer. what does this symbol indicate? a. compressed gas b. flammable c. corrosive d. oxidizing material - correct answer.oxidizing material what is measured by a nanometer? a. weight b. specific gravity c. length d. density - correct answer.length what is the optimum temperature for growth of most human pathogens? a. 25c b. 37c c. 30 c d. 45c - correct answer.37c what applies to a hematocrit? a. expressed as a decimal fraction b. represents the space occupied by the packed RBCS c. closely parallel the values of hemoglobins and RBC d. all the above - correct answer.all the above which term refers to media that permits the growth of one type of organism but inhibits the growth of others? a. selective media b. enriched media c. natural media d. differential media - correct answer.selective media what is the counterstain used in grams stain? a. eosin b. safranin c. iodine d. giemsa - correct answer.safranin what is the unit of measurement used for reporting results in canada? a. metric b. sc c. empirical d. SI - correct answer.SI
what is not a method or water purification? a. gas chromatography b. double distillation c. ion exchange column d. reverse osmosis - correct answer.gas chromatography what is associated with reverse isolation? a. does not require a private room for patient b. only gowns are worn by personnel entering the room c. protects the patient from infection d. prevents the transmission of infection through droplet - correct answer.protects the patient from infection which blood collection tube is used for WBC? a. blue stopper b. grey stopper c. black stopper d. lavender stopper - correct answer.lavender stopper what should be done when a blue stopper vacutainer does not fill properly? a. pour a little from a red tube into the blue one b. submit the tube for testing c. fill another blue tube partly full and mix two together d. repeat the procurement procedure and properly fill another blue tube - correct answer.reaper the procurement procedure and properly fill another blue tube what should be done if serum contains red cells? a. do nothing as a few cells are acceptable b. re-centrifuge the specimen c. change to a clean pipette and continue d. pour the serum into a clean tube - correct answer.re-centrifuge the specimen which animal is common source of blood for blood agar plates? a. sheep b. rabbits c. goats d. dogs - correct answer.sheep which applies to sterilization? a. destruction of all micro-organisms including spores b. accomplished by using soap and water c. used routinely to clean equipment d. used to make autopsy samples non-infectious before processing - correct answer.destruction of all micro - organisms including spores what should be done when separating serum from a suspected AIDS patient?
why is hematocrit ordered? a. determine the relative volume RBCS to plasma b. check the patients hemoglobin when anemia is suspected c. check the Rh factor in pregnant woman d. determine the clotting ability of the patients blood - correct answer.determine the relative volume RBCS to plasma which applies to the paraffin processing? a. cause tissue shrinkage b. removes lipids from tissue c. involves infiltration with paraffin wax source d. all the above - correct answer.all the above what is a cause of blood smear that appears to short? a. blood drop too small b. spreader angle too low c. blood drop too large d. spreader angle too high - correct answer.blood drop too small which applies to the kidneys? a. regulate the composition of the blood b. regulate the volume of the blood c. participate in the activation of vitamin D d. all the above - correct answer.al the above which applies to urine urobilinogen? a. not normal found in urine b. increased with obstructive jaundice c. measured using a test based on Ehrlich's reagent d. all the above - correct answer.increased in obstructive jaundice which pigment cause urine to be yellow in colour? a. dichromate b. urochromate c. porphyrins d. urochrome - correct answer.urochrome how much h2SO4 is required to make 225 mL of 2% solution - correct answer.2/100 = x / 225 -- (2)(225)/100 = 4.5 g what is leukopoiesis? a. increase in the production of WBC b. synthesis of white cells c. non nucleated d. destruction of WBC - correct answer.increase in the production of WBC
which term refers to an increase of urinary WBC? a. pyelonephritis b. cystitis c. urethritis d. pyuria - correct answer.pyuria what is the next step taken when a blood specimen and requisition do not match a. notify the nursing station to collect a new sample b. notify the nursing station and proceed with testing c. discard the specimen immediately d. notify your supervisor immediately - correct answer.notify the nursing station to collect a new sample what is the probable cause of a blood smear that is too thin? a. blood drop too small b. spreader angle too low c. blood drop too large d. spreader angle too high - correct answer.spreader angle too low what is the next step when a patient does not have an armband? a. doctor should cancel the test b. request armband from nursing c. patient may identify themselves d. phlebotomist should go ahead and draw the blood - correct answer.request armband from nurse which item may be disposed in the regular garbage? a. needle cap b. needle c. blood soaked cotton d. lancet - correct answer.needle cap which laboratory department prepares and processes tissue samples a. immunology b. histology c. microbiology d. chemistry - correct answer.histology what are platelets? a. derived from masts cells b. leukocytes c. nucleated d. thrombocytes - correct answer.thrombocytes how much eosin is required to make 25 ml of a 2 % solution - correct answer.
c. EDTA d. fluoride - correct answer.heparin what is the best angle for the needle insertion during venipuncture? a. 15 degrees b. 30 degrees c. 45 degrees d. 80 degrees - correct answer.30 degrees what does STAT mean? a. as soon as possible b. somatic tremor appears in tracing c. immediately d. some type of artifact throughout - correct answer.immediately which blood collection tube is collected for an INR? a. blue b. green c. lavendar/purple d. red - correct answer.blue which is a kidney function test? a. BUN b. PKU c. CPK d. FSH - correct answer.BUN which term refers to the bursting of a erythrocyte? a. hemorrhage b. hemolysis c. erythropoiesis d. homeostasis - correct answer.hemolysis what causes the appearance of holes in a blood smear? - correct answer.dirty slide what is detected by urine dipstix tests for bacteria? a. nitrates b. phospates c. nitrites d. none of the above - correct answer.nitrites what does a decreased hematocrit indicated? a. hemophilia b. anemia c. lipemia d. leukopenia - correct answer.anemia
what happens to blood cells in a hypertonic solution? a. swell and burst b. not affected c. hemolyze d. crenate - correct answer.crenate what should a patient avoid ingesting prior to collection of a focal blood sample? a. sodium b. red meat c. excessive vitamin c d. b and c - correct answer.red meat, excessive vitamin C which needle gauge is the smallest in size? a. 22 b. 20 c. 21 d. 18 - correct answer. what is the operation of an autoclave based on? a. free-flowing steam b. chemicals c. steam under pressure d. sound wavs - correct answer.steam under pressure how much NAC1 is required to make 100 ml of a 2% solution? - correct answer.2g which specimen requires anaerobic culture? a. fungus b. brain abscess c. stool d. sputum - correct answer.brain abscess which applies to liquid culture media? a. also called a broth b. bacteria are immobilized c. do not require autoclave d. none of the above - correct answer.also called broth what does "pneum" refer to? a. liver b. kidney c. abdomen d. lung - correct answer.lung which test could not be performed on a serum sample?
c. Acetest d. ictotest - correct answer.ictotest what is dehydration? a. process of adding water b. removal of water c. loss of water d. storing of water - correct answer.removal of water what is rouleaux? a. coin-like stacking of RBC b. clotting of the blood c. agglutination of RBC d. thrombin in the blood - correct answer.coin like stacking of RBC which anticoagulant is used for collection of blood gases? a. EDTA b. heparin c. oxalate d. citrate - correct answer.heparin what results when a blood specimen is allowed to clot? a. plasma plus blood cells b. serum plus blood cells c. anti coagulated blood d. serum plus plasma - correct answer.serum plus blood cells which cells contribute most to blood clotting? a. lymphocytes b. RBC c. platelets d. WBC - correct answer.platelets which reagent best achieves skin decontamination? a. alcohol b. normal saline c. soap and water d. iodine - correct answer.iodine what is susceptibility testing? a. identifies the appropriate antibiotic needed to kill the pathogen b. measures how fast pathogen can be destroyed c. identifies the type of microorganism in the system d. produces a pure culture - correct answer.identifies the appropriate antibiotic needed to kill the pathogen
which analyze is increased when serum is left sitting on a clot? a. glucose b. protein c. albumin d. potassium - correct answer.potassium which test determines the number of immature RBC? a. osmotic fragility test b. reticulocyte count c. RBC count d. stab cell count - correct answer.reticulocyte count how should specimens for arterial blood gases determination be transported to the laboratory? a. at body temp b. in a freezer c. on ice d. stab cell amount - correct answer.on ice which is not used in the gram stain? a. methylene blue b. safranin c. acetone d. crystal violet - correct answer.methylene blue what occurs when urine is stored at room temperature? a. turn alkaline b. precipitate crystals c. increase in bacterial count d. all the above - correct answer.all the above which step is out of order for histological processing? a. gross examination b. decalcification c. fixation d. dehydration - correct answer.decalcification what is quality assurance? a. formal surveillance directed at personnel b. formal surveillance directed at equipment c. formal surveillance directed at materials d. all the above - correct answer.all the above how is acid diluted with water? a. mix in equal quantities b. add water to the acid or base
