ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Single compound Refrigerants are classified by what two criteria?

  • Flammability and toxicity
  • Temperature range and hazardousness
  • Weight and color
  • Flammability and temperature range

2: Which refrigerant replaced R-12?

  • R-410A
  • R-22
  • R-407A
  • R-134A

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

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

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

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

5: What must be done to refrigerant pipes before being buried?

  • Coated
  • Leaked checked
  • Encased
  • Certified

6: A High-Probability System

  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is a system highly likely to leak form a failed connection or component of such system
  • is such that a leak of refrigerant from a failed connection will enter the occupied space
  • is such that a leak of refrigerant from a failed connection will enter an unoccupied space

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

  • True
  • False

8: All machine rooms must be outfitted with a detector that _______?

  • activates an audible alarm
  • activates a visual alarm
  • starts the ventilation system
  • All of the above

9: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.

  • True
  • False

10: 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

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

  • A field inspection shall be made before it is put into service
  • it shall not be operated below prescribed pressuers
  • 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

12: What does safe access mean?

  • Locked doors
  • A clear unobstructed path to the equipment and controls
  • Well-lit exit signs
  • OSHA approved

13: The Board of Boilers adopts by reference

  • Montreal Protocol Safety Code
  • MSCA Code
  • the MACS Pressure Vessel Code of Massachusetts
  • the 1997 ANSI/ASHRAE Safety Code

14: Which refrigerant class listed below is the most flammable?

  • A-3
  • B-2
  • C-3
  • A-1

15: Most CFC's are

  • flammable
  • toxic
  • inert but toxic
  • inert

16: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a

  • commercial occupancy
  • public assembly occupancy.
  • mercantile occupancy
  • business occupancy

17: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.

  • 6.6, 6.6
  • 2.5, 2.5
  • 3.0, 3.5
  • 2.5, 3.0

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

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

19: The color code of a tank of ammonia is

  • lavender
  • white
  • light green
  • silver

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

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

21: Who authorizes changes to the safety codes?

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

22: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.

  • 100
  • 110
  • 80
  • 90

23: What must be done to refrigerant pipes before being buried ?(8.10.4)

  • Classifed
  • Insulated and installed in a pipe duct (Encased)
  • Leak checked
  • Certified

24: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants

  • lower
  • higher
  • there is no Group B1 refrigerants
  • the same

25: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code

  • licensed welder
  • competent welder
  • welder qualified
  • licensed technician