ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: The Board of Boilers adopts by reference

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

2: How many gallons of water do you need per pound of ammonia?

  • 1
  • 10
  • 100
  • 50

3: Class 3 refrigerants are

  • toxic
  • non-flammable
  • highly flammable
  • non-toxic

4: Pressure vessels of 10 cubic feet or more gross volume shall use

  • at least one rupture member
  • a dual pressure-relief valve if charging into the atmosphere
  • at least three means of discharge and/or rupture discs
  • both a and b are correct

5: Ammonia (NH3) is a group III refrigerant

  • True
  • False

6: How many different groups of refrigerants are there?

  • 3
  • 15
  • 7
  • 11

7: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 22
  • 50
  • 18
  • 33

8: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.

  • 36
  • 48
  • 18
  • 24

9: All electrical work done on refrigeration systems must comply with

  • OSHA
  • ASHREA-15 Section 9.2.1
  • NEC and Massachusetts Modifications
  • Department of Energy

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

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

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

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

12: Before you change the type of refrigerant in a refrigeration system, what three things must be done?

  • Place sign, check for leaks, and insulate suction line
  • Make sure its compatible, notify owner, and notify AHJ.
  • Nothing must be done
  • you can never change refrigerants

13: Evaporators within 18" of a heating coil must be equipped with a

  • low limit control
  • pressure relief device
  • high limit control
  • zone valve

14: 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

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

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

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

  • True
  • False

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

  • 330
  • 1,000
  • 110
  • 6.6

18: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • load-side of the contactor in
  • 24 volt secondary side of the Class 2 transformer to the thermostat
  • first disconnect in
  • breaker panel in

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

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

20: What is the intention of the word “shall” as used in the code?

  • A mandatory requirement
  • A recommendation or advisory guideline
  • A technician’s choice of how it should be done
  • None of the above

21: How many CFMs are required per square foot of commercial office occupied space

  • .5 CFM
  • 5 CFM
  • 20 CFM
  • 15 CFM

22: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8

  • the liquid side of the system
  • the vapor side of the system
  • high side of the system
  • low side of the system

23: 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

24: 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

25: 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