ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

2: How far from the window does a relief valve need to be according to ASHRAE-15?

  • At least 20'
  • At least 30'
  • There is no minimum for relief valve and windows.
  • At least 40'

3: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant

  • does not require a pressure-limiting device
  • shall have a pressure limiting device installed on the high side of the system
  • shall have a pressure limiting device and a pressure relief valve installed
  • shall be inspected by the Boiler of Inspectors bi-annually

4: 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.

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

5: Which of the following is an inorganic refrigerant?

  • R-22
  • Ammonia
  • Chlorofluorocarbons
  • All of the above

6: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.

  • there is no Group B1 refrigerants
  • the same
  • higher
  • lower

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

  • 200
  • 330
  • 100
  • 150

8: Refrigeration piping before being buried shall be

  • leak tested
  • encased in pipe duct
  • pressure tested
  • All of the above

9: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.

  • 20
  • 10
  • 15
  • 25

10: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 50
  • 350
  • 550
  • 100

11: The color code of a tank of ammonia is

  • white
  • light green
  • silver
  • lavender

12: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?

  • Flush with R-11
  • Flush with RX-11
  • Flush with R-718
  • Flush with ammonia

13: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.

  • 24
  • 10
  • 18
  • 15

14: A positive displacement compressor is

  • is a reciprocating type compressor with 2 or more pistons
  • where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
  • a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
  • a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber

15: 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

16: 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

17: Direct systems using Group II refrigerants

  • shall be allowed to be used for human comfort.
  • shall be installed in Class T machinery rooms
  • shall not be used for air condition for human comfort
  • shall be installed per instruction of the AHJ

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

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

19: 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 T machinery room
  • Class A machinery room

20: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.

  • 7.00'
  • 8'4"
  • 9.00'
  • 7.25'

21: An example of direct system is

  • rooftop unit
  • chiller
  • absorber
  • none of the above

22: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants

  • there is no Group B1 refrigerants
  • lower
  • the same
  • higher

23: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)

  • commercial occupancy
  • institutional occupancy
  • illegal occupancy
  • public assembly occupancy

24: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.

  • 20
  • 50
  • 15
  • 75

25: A High-Probablity system

  • is such that a leak of refrigerant from failed connections will enter the occupied space
  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is such that a leak of refrigerant from failed connections will enter the unoccupied space
  • is a system highly likely to leak from a failed connection or component of such system