ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • “UM” and “UV”
  • “UV”
  • “UL”
  • “U” or “UM”

2: A pressure relief should be located at least _______ from windows and doors.

  • 15'
  • 25'
  • 20'
  • 30'

3: When a refrigeration or air conditioning system is installed

  • it shall not be operated below prescribed pressures
  • it shall be approved by the owner for proper operation.
  • the form of certificate shall be authorized by the Department of Pubic safety
  • a field inspection shall be made before it is put into service

4: How many refrigerant classifications are there for flammability?

  • 3
  • 2
  • 1
  • 7

5: What refrigerant doesn't have to be classifted?

  • R-711
  • R-718
  • R-134a
  • R-717

6: What is not a requirement of a class T machine room?

  • self-closing doors
  • automatic ventilation
  • tight fitting doors
  • fire hose connection to the building fire protection system

7: 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
  • first disconnect in
  • 24 volt secondary side of the Class 2 transformer to the thermostat
  • breaker panel in

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

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

9: Class 3 refrigerants are

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

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

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

11: Halogen refrigerants are corrosive to which type of metal?

  • magnesium
  • black iron
  • copper
  • stainless steel

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

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

13: What is Trichlorotrifluoromethane?

  • R-13
  • R-113
  • R-11
  • R-12

14: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.

  • True
  • False

15: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?

  • Muffler
  • Stop valve
  • Foot valve
  • Moisture indicator

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

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

17: Ammonia (NH3) is a group III refrigerant

  • True
  • False

18: How much refrigerant can be stored in a mechanical room outside of the system?

  • 150
  • 330
  • 200
  • 100

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

  • 6.6
  • 1,000
  • 110
  • 330

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 20' above grade
  • At least 15' above grade

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

  • Stainless steel
  • Magnesium alloy
  • PVC
  • Copper

22: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?

  • CO Sensing
  • refrigerant sensing
  • phosgene gas sening
  • A group sensing

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

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

24: Industrial occupancy is

  • a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
  • is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • Both a and b are correct

25: The Department that certifies the transportation of refrigerant is the

  • EPA
  • DOT
  • RSES
  • EPO