ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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

2: A hotel is considered a _______ occupancy.

  • commercial
  • institutional
  • residential
  • mercantile

3: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered

  • commercial occupancy
  • public assembly occupancy
  • institutional occupancy
  • mixed occupancy

4: Liquid level gauges must be provided with what?

  • A low level mark
  • A relief valve
  • Automatic shut-offs
  • A red line

5: What is R-611’s ASHRAE Safety Code?

  • B2
  • B3
  • C3
  • A2

6: Pressure vessels having an inside diameter of 6” or less shall be protected by

  • a pressure relief device
  • Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
  • a fusible plug
  • either a fusible plug or a pressure relief device

7: What does “ultimate strength” mean?

  • Design strength of the vessel or piping in a refrigeration system
  • Stress at which rupture will occur
  • Highest or design pressure allowed inside a machinery room
  • None of the above

8: Dual-pressure relief devices should be installed on

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

9: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested

  • quarterly
  • annually
  • bi-annually
  • regularly

10: Who authorizes the form of certificate of completion of refrigeration systems that should be used?

  • Supervisor or project manager in charge of the installation
  • Fire Marshal
  • Massachusetts Board of Boiler Rules
  • Owner

11: 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

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

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

13: What is R-22?

  • HFC
  • Chlorofluoromethane
  • CCFCM
  • Chlorodifluoromethane

14: A relief valve discharge capacity is rated in

  • temperature minus pounds of air per second divided by release rate squared
  • PSIG
  • Pounds of air per minute.
  • PSIA

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

  • relief valve
  • condenser
  • service valve
  • bleed valve

16: 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.

  • 90
  • 100
  • 80
  • 110

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

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

18: Ammonia can come in contact with _______ ?

  • Brass
  • Copper tubing
  • Aluminum
  • Copper

19: Name an HCFC refrigerant(s):

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

20: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.

  • True
  • False

21: What is the definition of exit?

  • Anywhere where a stairwell leads to outdoors
  • The separated fire-resistant portion of a means of egress providing a protected travel path between the exit access and the exit discharge
  • Any doorway or pathway unobstructed for access to anywhere considered safe
  • Both a & b

22: A Category D fluid

  • is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
  • is when the design pressure does not exceed 150 psi
  • a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
  • Both a and b are correct

23: High pressure controls should be set no higher than

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

24: When can recovered refrigerants be reused?

  • They can't
  • Only when used in original owner's equipment
  • Only if used in 30 days of recovery
  • None of the above

25: Which of the following are considered inorganic refrigerants?

  • R-717 and R-718
  • 410A and R-407C
  • R-500 and R-502
  • None of the above