Name:________________________________________
Date:_____________________
Block 6/Unit 3a – Clinical Applications and Maintenance of Lab Equipment
Test
1. What is the purpose of a centrifuge?
a. Used to separate substances of identical densities that are suspended in a fluid
b. Used to separate substances of different densities that are suspended in a fluid
c. Used to separate substances of different densities that are embedded in a solid
d. Used to separate substances of identical densities that are embedded in a solid
2. Centrifuges operate on what type of force?
a. Altitude
b. Gyroscopic
c. Synchronous
d. Gravity
3. What are the two major components of a centrifuge?
a. Motor and rotor
b. Fixed and swing-bucket
c. Motor and fixed
d. Lid and case
4. What are the two types of basic rotor designs for centrifuges?
a. Square and round
b. Fixed and swing-bucket
c. Metal and plastic
d. High speed and low speed
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Name:________________________________________
Date:_____________________
5. What are two safety features incorporated in a centrifuges?
a. Lid locks and out-of-balance detector
b. Seatbelts and lid locks
c. Airbags and out-of-balance detector
d. Straps and non-skid feet
6. What is the definition of centrifugation?
a. The process by which substances of identical densities are separated from one another
b. The process by which substances of different densities are brought towards one another
c. The process by which substances of different densities are separated from one another
d. None of the above
7. In what unit of measure is centrifugal force measured?
a. Pounds per square inch
b. Cubic centimeters
c. G-force
d. Joules
8. The time of centrifugation includes the time of acceleration but not what?
a. Braking
b. The time the centrifuge is at speed
c. The time the centrifuge is speeding up
d. Deceleration
9. What are two common configurations of a centrifuge?
a. Tabletop and small units
b. Floor standing and tabletop
c. Floor standing and large units
d. Ultralow temperature and room temperature
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Name:________________________________________
Date:_____________________
10. What two things should be checked in addition to a preventive maintenance inspection in a
centrifuge?
a. RPM and time
b. RPM and temperature
c. Time and temperature
d. Temperature and humidity
11. What cycle is most refrigeration based on?
a. Vapor Congestion
b. Vapor Compression
c. Vapor Cycling
d. Vaporization
12. Which component of the refrigeration system increases the pressure of refrigerant?
a. Evaporator
b. Condenser
c. Expansion Valve
d. Compressor
13. What is the expansion valve also known as?
a. Throttle Valve
b. Throttle Lever
c. Flash Valve
d. Flash Lever
14. What do you use to check the temperature in a refrigerator?
a. Thermometer
b. Lag thermometer
c. Calibrated thermometer
d. Flash thermometer
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Name:________________________________________
Date:_____________________
15. What do you clean off of the fan and coils?
a. Water and ice
b. Dust and Ice
c. Dust and dirt
d. Mold and water
16. What is the definition of a microscope?
a. An instrument used to look at objects that are far away
b. An instrument used to look at objects too small to see with the naked eye
c. A procedure telling how to look at objects that are far away
d. A procedure telling how to look at objects too small to see with the naked eye
17. What is the most common type of laboratory microscope?
a. Optical microscope
b. Electron microscope
c. Mechanical microscope
d. Digital Microscope
18. What magnification can a light microscope view objects at?
a. 2000 times
b. 1000 times
c. 500 times
d. 1500 times
19. Where is the light source located?
a. Above the slide
b. Connected to the lens
c. Above the stage
d. Below the diaphragm
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Name:________________________________________
Date:_____________________
20. What is the most common maintenance performed on a microscope?
a. Bulb replacement
b. Full rebuild
c. Lens replacement
d. Coarse and fine adjustment knob repair
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