ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: What must be done to all doors and access points in duct work going through a mechanical room?

  • Must be hindged
  • Must be screwed shut
  • Must be sealed and gasketed
  • 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
  • Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
  • over pressure protection and a rupture disc
  • over pressure protection as well as a temperature protection device

3: Name three things that must be done when changing refrigeration lubricant?

  • You can't change lubricants.
  • Nothing must be done
  • Place sign, check for leaks, insulate
  • Make sure it's compatible, notify owner, notify AHJ

4: Halo-carbon refrigerants cannot be used with what material?

  • Aluminum
  • Copper
  • Stainless Steel
  • Magnesium alloy

5: The discharge relief valve is located (9.4.6)

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

6: Fusible plugs must have what marked on them?

  • Melting temperature in F
  • Melting temperature in C
  • Opening pressure
  • All of the above

7: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant

  • shall be inspected by the Boiler of Inspectors bi-annually
  • shall have a pressure limiting device installed on the high side of the system
  • does not require a pressure-limiting device
  • shall have a pressure limiting device and a pressure relief valve installed

8: When a refrigeration or air conditioning system is installed

  • the form of certificate shall be authorized by the Department of Pubic safety
  • it shall be approved by the owner for proper operation.
  • a field inspection shall be made before it is put into service
  • it shall not be operated below prescribed pressures

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

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

10: How are refrigerant blends classified?

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

11: What type of copper is not permitted on refrigeration systems?

  • Type K
  • Type N
  • Type L
  • Type M

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

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

13: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8

  • low side of the system
  • the liquid side of the system
  • high side of the system
  • the vapor side of the system

14: What pipe can not be used for refrigeration?

  • L
  • K
  • M
  • N

15: Most CFC's are

  • flammable
  • toxic
  • inert but toxic
  • inert

16: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by

  • District Engineering Inspectors
  • Commissioned Inspectors
  • Master licensed Technician
  • both a or b

17: What refrigerant doesn't have to be classifted?

  • R-717
  • R-134a
  • R-711
  • R-718

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

  • business
  • commercial
  • mercantile
  • public assembly

19: 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

20: How many refrigerant classifications are there for flammability?

  • 3
  • 7
  • 2
  • 1

21: A class B1 refrigerant is considered

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

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

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

23: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.

  • True
  • False

24: Ammonia (NH3) is a group III refrigerant

  • True
  • False

25: A restaurant is classified as a

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