Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: How many different groups of refrigerants are there?

  • 7
  • 3
  • 15
  • 11

2: A relief valve discharge capacity is rated in

  • PSIA
  • temperature minus pounds of air per second divided by release rate squared
  • Pounds of air per minute.
  • PSIG

3: A relief valve shall be located at least ___ above grade.

  • 15'
  • 10'
  • 25'
  • 36'

4: A High-Probability System

  • is a system highly likely to leak form a failed connection or component of such system
  • is such that a leak of refrigerant from a failed connection will enter the occupied space
  • is such that a leak of refrigerant from a failed connection will enter an unoccupied space
  • is such that any leak will cause injury or death to anyone within a 100 square foot area

5: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8

  • the vapor side of the system
  • low side of the system
  • the liquid side of the system
  • high side of the system

6: When a refrigerating machinery room is used, the emergency procedures shall be posted

  • on a conspicuous card located near the evaporator
  • outside the room, immediately adjacent to each door
  • on a conspicuous card located near the compressor
  • inside the room, immediately adjacent to each door

7: Relief valves are rated in

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

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

  • salt
  • soil
  • sugar
  • sand

9: What is the boiling point of refrigerant governed by?

  • P&T relationship
  • Compressor RPM's
  • Evaporator temperature
  • Condenser sub-cooling

10: A hissing noise at the expansion valve is a good indication that

  • liquid is passing thru it
  • nothing is passing thru
  • expansion valve is oversized
  • gas is passing thru it

11: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)

  • Pressure gauge
  • Temperature gauge
  • Sight glass gauge
  • All of the above

12: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?

  • refrigerant sensing
  • phosgene gas sening
  • A group sensing
  • CO Sensing

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

  • 24
  • 18
  • 15
  • 10

14: 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
  • competent welder
  • welder qualified

15: 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.

  • 90
  • 80
  • 100
  • 110

16: What chemical in the refrigerant set off the leak detection alarm?

  • Fluorine
  • Chlorine
  • Both A and B
  • none of the above

17: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 55 lbs
  • 330 lbs
  • 500 lbs
  • 660 lbs

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

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

19: Humidity can be sensed with

  • human hair
  • bimetal
  • thermometer
  • pressure bellows

20: In a refrigeration system, you open a valve from the condenser and collect some material on a clean white sheet of bond paper, which of the following would you most likely be testing for?

  • checking the level of refrigerant in the system
  • testing for oil in the system
  • testing for moisture in the system
  • none of the above

21: Machinery rooms must be vented to ______?

  • outdoors
  • neutralizing tank
  • unoccupied spaces
  • basement

22: The heat picked up in the evaporator must equal to

  • the heat gained by the condenser
  • the heat of compression
  • the heat giving by the condenser
  • the heat lost by the medium being cooled

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

  • 10
  • 15
  • 25
  • III

24: Who is permitted to access a refrigeration machine room?

  • Contractors only
  • Any employee
  • Anyone, it's a completely safe area
  • Authorized persons only

25: When must refrigeration system covered by the code be inspected?

  • Annually
  • Upon installation
  • Annually and when installed
  • Not required