Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: If air is present in an absorption chilled water appliance, which of the following will most likely occur?

  • The Li-Br solution will become more diluted
  • Rust can form
  • The Li-Br solution will become more concentrated
  • System operating pressure will drop

2: All electrical work done on refrigeration systems must comply with

  • NEC and Massachusetts Modifications
  • OSHA
  • Department of Energy
  • ASHREA-15 Section 9.2.1

3: A VRF system is a direct system

  • true
  • false

4: Which of the following is NOT a positive displacement compressor?

  • scroll
  • screw
  • reciprocating
  • centrifugal

5: Lithium-bromide, Li-Br, is best characterized as a

  • salt
  • sugar
  • sand
  • soil

6: A 120 volt motor rated at 1,800 watts. You find the motor is drawings 25 amps. The motor is

  • drawing RLA and is running as it should
  • drawing LRA and is seized and should be replaced.
  • running hot
  • none of the above

7: The certificate of inspection

  • shall be authorized by a notarized insurance company
  • shall be posted and protected from dirt, water, and other elements
  • shall be posted on the compressor shell or electrical panel at the unit
  • shall be $20 and an additional fee of $1 for each tone above 20 tons

8: A device used to measure small pressure differences is the

  • pyrometer
  • phsycometirc
  • anemometer
  • manometer

9: If a halide torch is used for leak detection, what color is the flame if it detects a leak?

  • red
  • blue
  • green
  • orange

10: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.

  • the atmosphere
  • a de-pressurized recovery tank with a silver top and yellow bottom
  • a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
  • All of the above

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

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

12: Relief valves are rated in

  • pounds of air per minute
  • gallons of water per hour
  • gallons of water per minute
  • pounds of air per hour

13: Where must a refrigeration contractor's license number be displayed?

  • Trucks, invoices, and advertising
  • Trucks, license plates, and uniforms
  • Uniforms, checks, and invoices.
  • Truck, office, every job, and on all equipment

14: Can you use Ammonia in industrial applications?

  • When mixed with R-718
  • Yes, Under certain condidtions
  • Yes, always
  • No, never

15: Liquid level gauges must be provided with what?

  • A relief valve
  • A low level mark
  • A red line
  • Automatic shut-offs

16: Refrigerant restricted in 2004 but used for transition for decades:

  • R-134A
  • R-22
  • R-123
  • R-11

17: What refrigerant doesn't have to be classified?

  • R-422A
  • R-718
  • R-134A
  • R-717

18: A 50 VA control transformer with a 25 volt control output would be rated for _________ amps.

  • There isn't enough information to answer.
  • 2
  • 2.5
  • 1250

19: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code

  • licensed technician
  • licensed welder
  • welder qualified
  • competent welder

20: Direct systems using Group II refrigerants

  • shall be installed in Class T machinery rooms
  • shall be allowed to be used for human comfort.
  • shall be installed per instruction of the AHJ
  • shall not be used for air condition for human comfort

21: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?

  • R-22
  • R-113
  • R-11
  • R-12

22: What happens to copper joints when overheated?

  • nothing
  • joint becomes oxidized and ditorted
  • copper becomes harder
  • none of the above

23: "E" references ____ in the Ohm's law formula

  • amperage
  • resistance
  • capacitance
  • voltage

24: The equivalent length of pipe in a water piping system is

  • the total length of pipe plus equivalent-length of fittings
  • the total length of pipe as you would measure it
  • the total length of pipe as you would measure it plus 25% for fittigns
  • the total length of pipe plus equivalent of fittings multiplied by 2.31

25: What refrigerant doesn't have to be classifted?

  • R-718
  • R-711
  • R-134a
  • R-717