ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: What refrigerant doesn't have to be classified?

  • R-717
  • R-422A
  • R-718
  • R-134A

2: Most CFC's are

  • inert
  • inert but toxic
  • flammable
  • toxic

3: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • UM or UL
  • UL and UR
  • UV or UR
  • UL and UM

4: Pressure limiting devices are not required for systems containing less then ________ refrigerants.

  • 22 lbs
  • 6.6 lbs
  • 13.9 lbs
  • 44 lbs

5: 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

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

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

7: Pressure vessels with an internal volume of 3 cubic feet or less

  • do not need pressure relief protection
  • shall use pressure relief devices
  • shall use fusible plugs
  • shall use pressure relief devices or fusible plugs

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

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

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

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

10: Who is permitted to access a refrigeration machine room?

  • Any employee
  • Authorized persons only
  • Anyone, it's a completely safe area
  • Contractors only

11: What type of pressure relief device is used on a CO2 system?

  • Glove valve
  • Rupture disk
  • Fusible plug
  • Gate valve

12: Relief valves are rated in

  • gallons of water per hour
  • pounds of air per minute
  • gallons of water per minute
  • pounds of air per hour

13: The Board of Boilers adopts by reference

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

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

  • 110
  • 1,000
  • 6.6
  • 330

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

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

16: How much clearance do you need around the perimeter of electrical panels?

  • 24"
  • 12"
  • 36"
  • 18"

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

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

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

  • quarterly
  • bi-annually
  • annually
  • regularly

19: The 522 CMR 9.00 has adopted for reference ASHRAE ____

  • 25
  • 10
  • 15
  • III

20: The gauge thickness required on a CO2 tank construction is

  • 5/16"
  • 1/8"
  • 1/16"
  • 3/32"

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

  • Zinc
  • Nickel
  • Magnesium
  • Copper

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

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

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

  • relief valve
  • bleed valve
  • condenser
  • service valve

24: A room having machinery but no flame producing apparatus permanently installed and operated is considered a

  • Class B machinery room
  • Class M machinery room
  • Class A machinery room
  • Class T machinery room

25: The main cause of enacting the "no vending rule" of July 1st 1992 was

  • global warming potential
  • ozone depletion
  • both a & b
  • None of the above