ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: High pressure controls should be set no higher than

  • 80% of set point
  • 25% of set point
  • 10% of set point
  • 90% of set point

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

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

3: Refrigerants shall be classified by

  • requirements for commercial, industrial, and residential occupancies
  • toxicity and flammability
  • color codes
  • maximum permissible quantities of each group

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

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

5: Ammonia belongs to Group

  • B-2
  • A-1
  • A-2
  • B-1

6: A class B2 refrigerant is considered

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

7: 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
  • the aggregate of the high side and low side
  • 2.5 times the design pressure
  • the low side

8: No open flames are allowed in the machinery room unless?

  • Never can be allowed
  • Only when combustion air is provided from outside of the machinery room
  • Approved by the authorized person
  • Approved by the installing contractor

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

  • 110
  • 6.6
  • 330
  • 1,000

10: What type of relief valve is used on low pressure centrifugal compressor systems?

  • Spring-loaded relief valve
  • Rupture disc
  • Purge relief
  • None of the above

11: Name an HCFC refrigerant(s):

  • R-22
  • R-123
  • R-11
  • both a & b

12: What is the refrigerant dichlorodifluoromethane?

  • R-123
  • R-22
  • R-134A
  • R-12

13: Most CFC's are

  • flammable
  • toxic
  • inert
  • inert but toxic

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

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

15: Dual-pressure relief devices should be installed on

  • vessels of 3 cubic feet or more
  • vessels of 10 cubic feet or more
  • vessels of 10 cubic feet or less
  • vessels of 3 cubic feet or less

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

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

17: What do you need to do when you install a new system?

  • Add refrigerant
  • Document the superheat and subcooling reading
  • Insulate the suction line before you take a superheat reading
  • Have it inspected

18: Indirect systems using Group II refrigerants

  • shall be used in refrigeration system in excess of 1,000 lbs
  • shall be used for mechanical equipment only
  • shall be used in refrigeration system less than 1,000 lbs
  • shall have all refrigerant containing parts except piping, installed in a Class T machine room

19: R-11 belongs to Group

  • B-1
  • B-3
  • A-2
  • A-1

20: 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

21: Pressure vessels nameplate markings must be compliant with the

  • ASHRAE 34 Standards
  • CMR-588 & CMR-528
  • ASME Boiler and Pressure Vessel Code
  • All of the Above

22: Pressure vessels with an internal volume of 10 cubic feet or more

  • shall use rupture discs or duel pressure relief valves
  • shall use pressure relief devices or fusible plugs
  • shall use fusible plugs
  • shall use pressure relief devices

23: What was the main reason for enacting the no venting rule of July 1, 1992?

  • Ozone depletion
  • Green house effect
  • Global warming potential
  • All of the above

24: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?

  • T&P device
  • Temperature limiter device
  • Relief valve
  • Circuit Breaker

25: What refrigerant were phased out in 2004?

  • R-11
  • R-22
  • R-12
  • R-134a