ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A relief valve discharge capacity is rated in

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

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

  • True
  • False

3: Ammonia can come in contact with _______ ?

  • Brass
  • Copper
  • Aluminum
  • Copper tubing

4: A plug containing an alloy that will melt at a specific temperature to relief pressure is a

  • fusible plug
  • fusion plug
  • rupture plug
  • relief plug

5: A High-Probability System

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

6: B3 refrigerants are considered

  • non-toxic but flammable
  • toxic but non-flammable
  • toxic and highly flammable
  • non-toxic but non-flammable

7: How are refrigerant blends classified?

  • Based on best case Fractionation
  • Blends don't have to be classified
  • Based on worst case fractionation
  • Based on the oil used

8: 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

9: Pressure limiting devices are not required for systems containing less then ________ refrigerants.

  • 13.9 lbs
  • 6.6 lbs
  • 44 lbs
  • 22 lbs

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

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

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

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

12: What is the minimum height refrigeration piping should be placed against walls?

  • 6'
  • 72"
  • Ceiling height
  • 7.25'

13: Pressure relief valves shall be marked with the data from

  • Section XIII Division of the ASME Boiler & Pressure Code
  • Section IV Division of the ASME Boiler & Pressure Code
  • Section VIII Division of the ASME Boiler & Pressure Code
  • Section I Division VIII of ASME Boiler & Pressure Code

14: Who authorizes changes to the safety codes?

  • Contractor who last serviced the system.
  • Person in charge of the facility
  • Person who pulled the permit
  • Board of Boilers

15: How many flammability classifications are refrigerants in?

  • 5
  • 7
  • 2
  • 3

16: A pressure relief should be located at least _______ from windows and doors.

  • 30'
  • 25'
  • 20'
  • 15'

17: What pipe can not be used for refrigeration?

  • L
  • K
  • N
  • M

18: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?

  • R-718 is not rated unlimited because it's a dangerous refrigerant
  • Because it's cheap
  • Because it's a non-flammable refrigerant
  • Because it's water

19: 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

20: R-11 belongs to Group

  • B-1
  • B-3
  • A-2
  • A-1

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

  • 36'
  • 10'
  • 25'
  • 15'

22: Dual-pressure relief devices should be installed on

  • vessels of 10 cubic feet or more
  • vessels of 3 cubic feet or less
  • vessels of 10 cubic feet or less
  • vessels of 3 cubic feet or more

23: Who approves containers for refrigerants?

  • D.O.D
  • D.O.T
  • D.O.E
  • E.P.A

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

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

25: Pressure vessels with an internal volume of 3 cubic feet or more

  • do not need pressure relief protection
  • shall use pressure relief devices or fusible plugs
  • shall use fusible plugs
  • shall use pressure relief devices