Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: 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

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

2: R-123 belongs to Group

  • B-2
  • B-1
  • A-3
  • B-3

3: R-11 has the greatest corrosive effect on

  • Copper
  • Aluminum
  • Magnesium
  • Bronze

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

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

5: What is the voltage of each leg to ground of a three-phase motor with a 460v supply voltage?

  • 240v
  • 120v
  • 208v
  • 277v

6: At higher altitudes, boiling temperatures

  • increase
  • depends on the refrigerant
  • decrease
  • are unaffected

7: Which refrigerant class listed below is the most flammable?

  • B-2
  • A-1
  • A-3
  • C-3

8: When a refrigeration or air conditioning system is installed

  • a field inspection shall be made before it is put into service
  • the form of certificate shall be authorized by the Department of Pubic safety
  • it shall not be operated below prescribed pressures
  • it shall be approved by the owner for proper operation.

9: Pipe identification labels are required when the system contains more than

  • 55 lbs
  • 110 lbs
  • 120 lbs
  • 65 lbs

10: What happens after your initial inspection of a pressure vessel?

  • Inspector leaves a metal tag with a certification listed on it
  • Notify the AHJ to let them know that the system been inspected
  • Notify the Fire Marshal that the system has been inspected and approved
  • There is a temporary shut-down until a final inspection can be performed.

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

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

12: 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

13: Low temperature systems should have what?

  • High pour point
  • Low pour point
  • High viscosity
  • None of the above

14: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 18
  • 22
  • 33
  • 50

15: A positive displacement compressor is

  • a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
  • a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
  • where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
  • is a reciprocating type compressor with 2 or more pistons

16: Stop valves shall not be permitted between the system and the

  • bleed valve
  • relief valve
  • condenser
  • service valve

17: A machine room with a refrigerant system using ammonia shall

  • be provided with a continuously operated ventilation system
  • be considered a non-hazardous location in accordance with National Electrical code
  • have no flame producing apparatus permanently installed and operated
  • All of the above

18: Heat transferred by conduction from one body to another is done via:

  • gas
  • liquid
  • solid
  • All of the above

19: Control systems can be classified by

  • source of power
  • economy of operation
  • tonnage of system
  • safety

20: one BTU equals

  • Pi
  • 12,000 hp
  • 3.41 hp
  • 31.4 hp

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

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

22: The low pressure oil safety switch

  • must be reset manually
  • resets itself automatically
  • resets itself after the time delay has terminated
  • never trips

23: A secondary coolant is defined as

  • a low temperature refrigerant used for cascading systems
  • any refrigerant direcly in contact with the cooling space for process cooling
  • a combination of interconnected parts from a closed circuit in where fluid is circulated for the purpose of cooling for a refrigeration system.
  • any liquid used for the transmission of heat without a change of state in A/C refrigeration systems having flash point above 150F

24: Ammonia vaporization takes place at what temperature?

  • -32F
  • -460F
  • -110F
  • -28F

25: What kind of material can't be used on the outlet of a relief valve?

  • Stainless Steel
  • Aluminum
  • Copper
  • PVC