ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

  • bi-annually
  • regularly
  • annually
  • quarterly

2: Name a CFC refrigerant(s):

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

3: 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
  • breaker panel in
  • first disconnect in
  • 24 volt secondary side of the Class 2 transformer to the thermostat

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

  • 24
  • 48
  • 36
  • 18

5: 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

6: Machinery rooms must be vented to ______?

  • neutralizing tank
  • unoccupied spaces
  • outdoors
  • basement

7: The Board of Boilers adopts by reference

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

8: Can you use Ammonia in industrial applications?

  • Yes, Under certain condidtions
  • When mixed with R-718
  • Yes, always
  • No, never

9: What kind of material can't be used on the outlet of a relief valve?

  • PVC
  • Stainless Steel
  • Aluminum
  • Copper

10: Pressure vessels with an internal volume of 3 cubic feet or more

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

11: What type of relief valve is used on low pressure centrifugal compressor systems?

  • Spring-loaded relief valve
  • Rupture disc
  • Purge relief
  • None of the above

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

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

13: A class B2 refrigerant is considered

  • non-toxic and non-flammable
  • toxic and somewhat flammable
  • toxic and non-flammable
  • non-toxic and highly flammable

14: 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

15: Halogenated refrigerants cannot be used with what material?

  • Stainless steel
  • Magnesium alloy
  • Aluminum
  • Copper

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

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

17: What is an example of institutional occupancy?

  • Football stadium
  • Shopping mall
  • Dorms
  • Hospital

18: 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.

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

19: Where must a refrigeration contractor's license number be displayed?

  • Truck, office, every job, and on all equipment
  • Uniforms, checks, and invoices.
  • Trucks, license plates, and uniforms
  • Trucks, invoices, and advertising

20: Systems containing more than 110 pounds must have stop valves located at the

  • compressor suction inlet
  • compressor discharge outlet
  • receiver inlet and outlet
  • All of the above

21: High pressure controls should be set no higher than

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

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

  • service valve
  • relief valve
  • bleed valve
  • condenser

23: Refrigerant restricted in 2004 but used for transition for decades:

  • R-22
  • R-123
  • R-134A
  • R-11

24: A High-Probability System

  • 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 an unoccupied space
  • 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

25: R-410A is classified as a ____ refrigerant on the safety matrix.

  • A-2
  • B-2
  • B-1
  • A-1