ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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

2: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code

  • over pressure protection and a rupture disc
  • over pressure protection as well as a temperature protection device
  • Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
  • over pressure protection

3: What pipe can not be used for refrigeration?

  • K
  • M
  • L
  • N

4: What section of ASHRAE-15 governs pressure vessels?

  • OSHA
  • Section 9 ASHRAE-15 ASME VIII unfired
  • Section 7 ASHRAE-15 ASME VIII fired
  • Section 6 ASHRAE-34 ASME VIII unfired

5: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • “UM” and “UV”
  • “UL”
  • “UV”
  • “U” or “UM”

6: Fusible plugs shall not be used with pressure vessels of

  • 15 square feet or less
  • 15 cubic feet or more
  • 3 cubic feet or more
  • 3 cubic feet or less

7: Class T machine room

  • shall include closets used for setting equipment
  • shall have refrigerant leak detecting systems installed inside and outside the room
  • shall have remote controls to stop the action of the refrigerant compressor
  • has no flame producing apparatus permanently installed

8: 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

9: The discharge relief valve is located (9.4.6)

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

10: What must be done if refrigeration lines pass through a concrete floor?

  • moisture barrier
  • installed through a pipe casing
  • insulated
  • leak checked

11: How many flammability classifications are refrigerants in?

  • 3
  • 7
  • 2
  • 5

12: How many different groups of refrigerants are there?

  • 15
  • 7
  • 11
  • 3

13: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.

  • the return air ducted system
  • Machinery rooms need not be vented
  • the mechanical room housing the refrigeration system
  • the outdoors

14: Refrigerant restricted in 2004 but used for transition for decades:

  • R-11
  • R-22
  • R-134A
  • R-123

15: A restaurant is classified as a

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

16: What is an example of institutional occupancy?

  • Dorms
  • Shopping mall
  • Hospital
  • Football stadium

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

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

18: Halogenated refrigerants cannot be used with what material?

  • Magnesium alloy
  • Stainless steel
  • Aluminum
  • Copper

19: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • load-side of the contactor in
  • 24 volt secondary side of the Class 2 transformer to the thermostat
  • first disconnect in
  • breaker panel in

20: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.

  • 10
  • 15
  • 25
  • 20

21: Which refrigerant(s) is an HFC?

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

22: A relief valve discharge capacity is rated in

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

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

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

24: What type of pressure relief device is used on a CO2 system?

  • Rupture disk
  • Fusible plug
  • Glove valve
  • Gate valve

25: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 22
  • 50
  • 33
  • 18