ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of

  • the ASME Boiler and Pressure Vessel Code
  • Section 11.3.1.5 ASHRAE 15 Standard
  • the ANSI Standard 10.7.2
  • both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5

2: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

3: When is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

4: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the

  • boiler
  • outside the machinery room
  • compressor
  • evaporator

5: The discharge relief valve is located (9.4.6)

  • on top of the condensor
  • between the compressor and the stop valve
  • between the compressor and reciever
  • between the compressor and oil separator

6: 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

7: Relief valves are rated in

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

8: Name an HCFC refrigerant(s):

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

9: 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
  • the liquid side of the system
  • high side of the system
  • low side of the system

10: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.

  • 8'4"
  • 9.00'
  • 7.00'
  • 7.25'

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

  • 10
  • 25
  • III
  • 15

12: A High-Probablity system

  • is a system highly likely to leak from a failed connection or component of such 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 failed connections will enter the unoccupied space
  • is such that a leak of refrigerant from failed connections will enter the occupied space

13: Refrigerants shall be classified by

  • requirements for commercial, industrial, and residential occupancies
  • maximum permissible quantities of each group
  • color codes
  • toxicity and flammability

14: Ammonia can come in contact with _______ ?

  • Brass
  • Aluminum
  • Copper tubing
  • Copper

15: What is a Category "D" fluid?

  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
  • A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
  • A typical refrigerant used on newer air conditioning and heat pump ssytems
  • Any fluid that exceeds 150 psig and has design temperature of over 366F

16: _____ and its alloys are suitable for use with ammonia systems.

  • Copper
  • Zinc
  • Aluminum
  • Magnesium

17: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.

  • 5.5
  • 2.0
  • 2.5
  • 3.0

18: A hotel is considered a _______ occupancy.

  • commercial
  • institutional
  • residential
  • mercantile

19: A restaurant is classified as a

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

20: R-123 belongs to Group

  • B-1
  • B-2
  • A-3
  • B-3

21: Can you use Ammonia in industrial applications?

  • Yes, Under certain condidtions
  • No, never
  • When mixed with R-718
  • Yes, always

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

  • 660 lbs
  • 55 lbs
  • 550 lbs
  • 330 lbs.

23: When a refrigeration or air conditioning system is installed

  • it shall not be operated below prescribed pressures
  • 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 be approved by the owner for proper operation.

24: Ammonia (NH3) is a group III refrigerant

  • True
  • False

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

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