Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.

  • 15
  • 75
  • 55
  • 50

2: How many forces operate a thermostatic expansion valve?

  • 4
  • 2
  • 3
  • 1

3: R-12. R-22, and R-40 are considered Group I refrigerants.

  • True
  • False

4: At higher altitudes, the boiling point of refrigerant is

  • the same
  • lower
  • equal to the coefficient of water at 32F
  • higher

5: What would be the classification of a prison?

  • Institutional
  • Place of assembly
  • Large mercantile
  • Industrial

6: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.

  • low pressure
  • critical pressure
  • high pressure
  • design pressure

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

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

8: What type refrigerant is NOT ozone depleting?

  • CFC
  • Halon
  • HFC
  • HCFC

9: NH3 is

  • R-718
  • ammonia
  • R-508A
  • lithium bromide

10: In a low temperature refrigeration system, the benefit of the system using P.A.G. oil is

  • it is hydroscopic
  • it traps moisture
  • viscosity
  • all of the above

11: Refrigerant is metered into the evaporator on a large centrifugal chiller thru the

  • low side of the system
  • high side float assembly
  • cap tube
  • none of the above

12: Gauge pressure is

  • Absolute pressrue
  • Force of pressure above that of atmosphere
  • Barometric pressure
  • Atmospheric pressure

13: What percentage of amperage difference is allowable phase to phase on a HVAC circuit phased to phase?

  • 1%
  • 4%
  • 25%
  • 2%

14: The oil separator is always inserted in the system

  • to prevent oil logging
  • in a cool spot
  • in the discharge line
  • where it can be easily serviced

15: On cooling towers, what causes the condenser water to drop

  • evaporation of the water droplets
  • sensible heat
  • ambient temperatures
  • tower fans

16: Ammonia belongs to Group

  • B-2
  • B-1
  • A-2
  • A-1

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

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

18: A restaurant is classified as a

  • public assembly occupancy
  • mixed occupancy
  • commercial occupancy
  • large mercantile occupancy

19: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into

  • the low-pressure side of the system
  • the high side of the system
  • the liquid receiver
  • both a and c are correct

20: How far from the window does a relief valve need to be according to ASHRAE-15?

  • At least 40'
  • At least 20'
  • At least 30'
  • There is no minimum for relief valve and windows.

21: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 350
  • 50
  • 100
  • 550

22: Total heat of a substance is considered

  • enthalpy
  • sensible heat
  • specific heat
  • empathetical

23: What section governs pressure vessels?

  • Section ASHREA 34
  • Section 1 ASHREA 15 ASME fired
  • Section 8 ASHREA 15 ASME unfired
  • OSHA

24: A chiller entering and leaving temperature difference is?

  • 10 degrees F
  • 50 degrees F
  • 5 degrees F
  • 20 degrees F

25: The best way to detect ammonia in brine is

  • potassium of line
  • carbonation of soda
  • nessler regaent
  • CO2 gas