Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.

  • color-coded glass to determine type of refrigerant
  • moisture indicators
  • automatic closing shut-off valves
  • All of the above

2: One ton of refrigeration is defined as ______ btu/minute.

  • 720,000
  • 60
  • 12,000
  • 200

3: A motor is rated for 120 volts and has a RLA (rated-load amps) of 5 amps. What is the wattage of the motor?

  • 746 watts
  • 5KW
  • 1000 watts
  • 600 watts

4: Pressure limiting devices are not required for systems containing less then ________ refrigerants.

  • 22 lbs
  • 6.6 lbs
  • 13.9 lbs
  • 44 lbs

5: How would you know if there was a loss of crankcase pressure?

  • oil will thicken
  • oil will foam
  • oil will thin out
  • oil level will rise

6: The solution that is pumped into the concentrator in an absorption chiller is referred to as the

  • strong solution
  • weak solution
  • concentrated solution
  • absorbed solution

7: The outer portion of shell of the compressor used on low-pressure chillers is called the

  • nozzle
  • suction
  • baffle
  • volute

8: After setting up a forward curved fan for the desired conditions, something happened to lower the total static pressure the fan had to operate against. Which would occur?

  • CFM and RPM decrease
  • CFM and HP increase
  • CFM and HP decrease
  • RPM and CFM increase

9: A single pole-double throw switch used how many wires excluding the ground wire?

  • five
  • two
  • four
  • three

10: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.

  • 10
  • 24
  • 18
  • 15

11: Which is the lowest vacuum?

  • 1,000 Microns
  • 5 psig
  • 5" hg
  • 10 psia

12: A EPR valve is installed on what type of evaporators?

  • high-temperature evaporators
  • low-temperature evaporators
  • plate evaporators
  • shell and tube evaporators

13: How many flammability classifications are refrigerants in?

  • 5
  • 2
  • 3
  • 7

14: What pipe can not be used for refrigeration?

  • N
  • K
  • L
  • M

15: The 522 CMR 9.00 has adopted for reference ASHRAE ____

  • 15
  • III
  • 10
  • 25

16: R-123 belongs to Group

  • B-2
  • B-1
  • B-3
  • A-3

17: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • 24 volt secondary side of the Class 2 transformer to the thermostat
  • first disconnect in
  • breaker panel in
  • load-side of the contactor in

18: How many closing forces operate a thermostatic expansion valve?

  • 4
  • 3
  • 2
  • 1

19: R-717 is

  • ammonia
  • carbon dioxide
  • water
  • trichloromethane

20: What must be done to all doors and access points in duct work going through a mechanical room?

  • Must be hindged
  • Must be screwed shut
  • Must be sealed and gasketed
  • All of the above

21: "I" represents ____ in the Ohm's law formula.

  • voltage.
  • amperage
  • capacitance
  • resistance

22: The gauge thickness required on a CO2 tank construction is

  • 5/16"
  • 1/16"
  • 1/8"
  • 3/32"

23: A start capacitor in series with a start winding will

  • decrease the amp draw of the motor
  • increase starting torque
  • increase running efficiency
  • increase the amp draw of the motor

24: What is the refrigerant chlorodifluoromethane?

  • R-123
  • R-22
  • R-12
  • R-134a

25: There can be no airflow from an occupied space through a machine room unless what?

  • System is high velocity
  • System is ducted and sealed
  • Duct is not located in the ceiling
  • None of the above.