ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

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

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

3: What is R-22?

  • HFC
  • CCFCM
  • Chlorodifluoromethane
  • Chlorofluoromethane

4: A 3-cubic foot receiver must have what type of relief valve?

  • fusible plug
  • relief valve
  • rupture device
  • none of the above

5: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.

  • the atmosphere
  • a de-pressurized recovery tank with a silver top and yellow bottom
  • a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
  • All of the above

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

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

7: 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

  • compressor
  • evaporator
  • outside the machinery room
  • boiler

8: Name a CFC refrigerant(s):

  • R-11
  • R-12
  • R-123
  • both a & b

9: When air is ducted through a machine room that services occupied space, What must be done?

  • Flanged and gasketed
  • Insulated and cross broke
  • Welded and seamed.
  • Ducted and sealed

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

  • Stainless steel
  • Magnesium alloy
  • Copper
  • PVC

11: Which refrigerant(s) is an HFC?

  • R-22
  • R-410A
  • R-502
  • All of the above

12: Class 3 refrigerants are

  • highly flammable
  • non-toxic
  • non-flammable
  • toxic

13: 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 an unoccupied space
  • 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

14: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.

  • 90%
  • 100%
  • 75%
  • 80%

15: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of

  • the high side
  • 2.5 times the design pressure
  • the low side
  • the aggregate of the high side and low side

16: Ammonia (NH3) is a group III refrigerant

  • True
  • False

17: A professional or office building would be considered what type of occupancy?

  • business
  • public assembly
  • commercial
  • mercantile

18: What pipe can not be used for refrigeration?

  • M
  • K
  • N
  • L

19: What would be the classification of a prison?

  • Large mercantile
  • Institutional
  • Industrial
  • Place of assembly

20: 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

21: The discharge relief valve is located (9.4.6)

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

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

  • 36'
  • 10'
  • 25'
  • 15'

23: 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

24: Large mercantile occupancy is

  • a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
  • a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
  • a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
  • a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.

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

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