Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: How many CFMs are required per square foot of commercial office occupied space

  • 5 CFM
  • 20 CFM
  • .5 CFM
  • 15 CFM

2: A self contained system

  • is a unit system Group I refrigerants only
  • is a complete factory made and tested system
  • is any system or part of a system used to increase evaporation by expansion or vaporization
  • is a unit system Group II refrigerants only

3: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code

  • over pressure protection and a rupture disc
  • Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
  • over pressure protection
  • over pressure protection as well as a temperature protection device

4: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

5: Pressure is equivalent of

  • Force
  • Force / Area
  • Force X Area
  • Area X Force

6: 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

7: The best way to determine the voltage requirement for an electrical component is to

  • determine the capacity of the service panel
  • read the nameplate data
  • check with the utility company
  • read the voltage with a mulitmeter

8: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere

  • 110
  • 330
  • 6.6
  • 1,000

9: Which winding have the most turns?

  • they have equal amount of turns
  • Start
  • run
  • depends on the motor phase

10: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.

  • True
  • False

11: Name an HCFC refrigerant(s):

  • R-22
  • R-123
  • R-11
  • both a & b

12: When the compressor is below the condensor

  • traps are not needed on this type of system
  • traps are needed on the discharge line
  • traps are needed on the suction line
  • traps are needed on the oil return line

13: The 4 basic methods of determining whether the proper amount of refrigerant is being introduced into the system are

  • sight glass, weight, paper method, and frost line.
  • sight glass, weight, pressure, and frost line
  • sight glass, weight, pressure, and dipstick
  • Buss-eye, weight, pressure, and frost line

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

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

15: No open flames are allowed in the machinery room unless?

  • Only when combustion air is provided from outside of the machinery room
  • Never can be allowed
  • Approved by the authorized person
  • Approved by the installing contractor

16: Ammonia can come in contact with _______ ?

  • Copper tubing
  • Aluminum
  • Brass
  • Copper

17: Name a CFC refrigerant(s):

  • R-11
  • R-12
  • R-123
  • both a & b

18: On an air cooled condenser, if the ambient air is 35F and dropping, what's its effect to the condensor?

  • it would make the condenser more efficient
  • it would make the condenser less efficient
  • it would cause the condenser to sweat
  • it would have no effect on the condenser

19: The main cause of enacting the "no vending rule" of July 1st 1992 was

  • global warming potential
  • ozone depletion
  • both a & b
  • None of the above

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

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

21: What is the amp draw of a 40 VA transformer at 24 volts

  • 1,000 amps
  • 1K amps
  • 1.6 amps
  • 106 amps

22: Which is the lowest vacuum?

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

23: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.

  • 100
  • 90
  • 80
  • 110

24: What type of copper is not permitted on refrigeration systems?

  • Type M
  • Type N
  • Type L
  • Type K

25: While the system is operating, the discharge line should be

  • too hot to hold by hand
  • at the same temperature as the crankcase
  • room temperature
  • 10-15F warmer than ambient