ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Dual-pressure relief devices should be installed on

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

2: Who authorizes changes to the safety codes?

  • Person who pulled the permit
  • Board of Boilers
  • Person in charge of the facility
  • Contractor who last serviced the system.

3: How are refrigerant blends classified?

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

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

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

5: 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

6: Direct systems using Group II refrigerants

  • shall be allowed to be used for human comfort.
  • shall not be used for air condition for human comfort
  • shall be installed per instruction of the AHJ
  • shall be installed in Class T machinery rooms

7: Halogen refrigerants are corrosive to which type of metal?

  • copper
  • magnesium
  • black iron
  • stainless steel

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

  • 550 lbs
  • 660 lbs
  • 330 lbs.
  • 55 lbs

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

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

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

  • 1,000
  • 110
  • 330
  • 6.6

11: _____ alloys shall not be used in contact with an halogenated refrigerants.

  • Nickel
  • Zinc
  • Magnesium
  • Copper

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

  • bleed valve
  • relief valve
  • condenser
  • service valve

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

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

14: R-22 is classified as a ____ refrigerant on the safety matrix.

  • B-2
  • A-1
  • B-1
  • A-2

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

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

16: Name a CFC refrigerant(s):

  • R-11
  • R-12
  • R-123
  • both a & b

17: Trichlorofluoromethane is the name of what refrigerant?

  • R-11
  • R-502
  • R-113
  • R-12

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

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

19: 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

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

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

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

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

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 such that a leak of refrigerant from a failed connection will enter an unoccupied space
  • is a system highly likely to leak form a failed connection or component of such system

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

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

24: How many different groups of refrigerants are there?

  • 3
  • 7
  • 11
  • 15

25: Low temperature systems should have what?

  • High pour point
  • Low pour point
  • High viscosity
  • None of the above