ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

  • relief valve
  • bleed valve
  • service valve
  • condenser

2: R-717 is

  • trichloromethane
  • carbon dioxide
  • water
  • ammonia

3: 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

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

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

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

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

6: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere

  • 6.6
  • 330
  • 1,000
  • 110

7: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?

  • refrigerant sensing
  • CO Sensing
  • A group sensing
  • phosgene gas sening

8: 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

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

9: An example of direct system is

  • rooftop unit
  • chiller
  • absorber
  • none of the above

10: A class B1 refrigerant is considered

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

11: When an inspection is needed, how often must it be done?

  • every 18 months
  • every 36 months
  • annually
  • every 24 months

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

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

13: Can ammonia be used on domestic system?

  • no
  • yes
  • no, unless there is proper ventilation system installed
  • yes, for systems under 10 tons

14: NH3 is

  • R-508A
  • R-718
  • ammonia
  • lithium bromide

15: Industrial occupancy is

  • a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
  • is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • Both a and b are correct

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

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

17: Systems containing more than 110 pounds must have stop valves located at the

  • compressor suction inlet
  • compressor discharge outlet
  • receiver inlet and outlet
  • All of the above

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

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

19: Where are the three places that the discharge from an ammonia relief valve be piped?

  • atmosphere, tank containing water, where the A.H.J. indicates
  • underground, into drain, into mechanical room
  • to chemical neutralizing tank only
  • none of the above

20: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)

  • Pressure gauge
  • Temperature gauge
  • Sight glass gauge
  • All of the above

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

22: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.

  • high pressure
  • critical pressure
  • low pressure
  • design pressure

23: Halogenated refrigerants cannot be used with what material?

  • Stainless steel
  • Copper
  • Magnesium alloy
  • Aluminum

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

  • you can never change refrigerants
  • Place sign, check for leaks, and insulate suction line
  • Make sure its compatible, notify owner, and notify AHJ.
  • Nothing must be done

25: How many CFMs are required per square foot of commercial office occupied space

  • .5 CFM
  • 20 CFM
  • 5 CFM
  • 15 CFM