ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

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

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

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

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

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

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

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

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

5: What happens after your initial inspection of a pressure vessel?

  • There is a temporary shut-down until a final inspection can be performed.
  • Inspector leaves a metal tag with a certification listed on it
  • Notify the AHJ to let them know that the system been inspected
  • Notify the Fire Marshal that the system has been inspected and approved

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

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

7: What refrigerant were phased out in 2004?

  • R-11
  • R-12
  • R-22
  • R-134a

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

9: R-123 belongs to Group

  • B-3
  • B-2
  • A-3
  • B-1

10: 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, 3.0
  • 3.0, 3.5
  • 2.5, 2.5
  • 6.6, 6.6

11: A relief valve discharge capacity is rated in

  • Pounds of air per minute.
  • PSIA
  • temperature minus pounds of air per second divided by release rate squared
  • PSIG

12: R-12. R-22, and R-40 are considered Group I refrigerants.

  • True
  • False

13: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?

  • When there is a space 6' or more above it
  • When it's used as part of a supply or return air system
  • When its white
  • When there are sprinklers above

14: What is the minimum height refrigeration piping should be placed against walls?

  • 72"
  • 7.25'
  • 6'
  • Ceiling height

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

  • 100
  • 1
  • 10
  • 50

16: A class B2 refrigerant is considered

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

17: An example of direct system is

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

18: The Board of Boilers adopts by reference

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

19: 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.

  • 10
  • 15
  • 25
  • 20

20: A declaration test is needed when the system contains more than

  • 65 lbs
  • 110 lbs
  • 120 lbs
  • 55 lbs

21: Each machinery room shall contain

  • high and low pressure controls
  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate
  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements

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

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

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

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

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

  • A field inspection shall be made before it is put into service
  • The company who installed the system must notify the fire department in the jurisdiction where installed
  • it shall not be operated below prescribed pressuers
  • the form or certificate shall be authorized by the Department of Public Safety

25: Class T machine room

  • shall include closets used for setting equipment
  • shall have remote controls to stop the action of the refrigerant compressor
  • shall have refrigerant leak detecting systems installed inside and outside the room
  • has no flame producing apparatus permanently installed