ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

2: What type of relief valve is used on a CO2 system?

  • rupture disc
  • gate valve
  • glove disc
  • fusible plug

3: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.

  • color-coded glass to determine type of refrigerant
  • moisture indicators
  • automatic closing shut-off valves
  • All of the above

4: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • UV or UR
  • UL and UR
  • UM or UL
  • UL and UM

5: Ammonia can come in contact with _______ ?

  • Copper tubing
  • Copper
  • Aluminum
  • Brass

6: A positive displacement compressor is

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

7: R-717 is

  • trichloromethane
  • carbon dioxide
  • water
  • ammonia

8: How far from the ground does a relief valve need to be?

  • At least 20' above grade
  • At least 15' above grade
  • At least 25' above grade
  • Not more than 3' above grade

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

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

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

  • relief valve
  • bleed valve
  • service valve
  • condenser

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

  • 25
  • 10
  • 15
  • III

12: 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

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

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

14: Where a refrigeration or air conditioning system is installed,

  • the form or certificate shall be authorized by the Department of Public Safety
  • The company who installed the system must notify the fire department in the jurisdiction where installed
  • A field inspection shall be made before it is put into service
  • it shall not be operated below prescribed pressuers

15: A class B2 refrigerant is considered

  • non-toxic and highly flammable
  • toxic and somewhat flammable
  • toxic and non-flammable
  • non-toxic and non-flammable

16: How many refrigerant classifications are there for toxicity?

  • 1
  • 5
  • 2
  • 3

17: A restaurant is classified as a

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

18: Before you change the type of refrigerant in a refrigeration system, what three things must be done?

  • nothing must be done
  • place sign, check for leaks, insulate
  • you can't change refrigerants
  • make sure it's compatible, notify owner, notify A.H.J

19: 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

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

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

21: 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

22: A High-Probability System

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

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

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

24: The color code of a tank of ammonia is

  • white
  • light green
  • silver
  • lavender

25: There can be no airflow from an occupied space through a machine room unless what?

  • System is high velocity
  • System is ducted and sealed
  • Duct is not located in the ceiling
  • None of the above.