Topics: ASHRAE/CMR
1: What was the main reason for enacting the no venting rule of July 1, 1992?
- Ozone depletion
- Green house effect
- Global warming potential
- All of the above
2: The Board of Boilers adopts by reference
- Montreal Protocol Safety Code
- MSCA Code
- the 1997 ANSI/ASHRAE Safety Code
- the MACS Pressure Vessel Code of Massachusetts
3: B3 refrigerants are considered
- non-toxic but flammable
- non-toxic but non-flammable
- toxic and highly flammable
- toxic but non-flammable
4: R-22 is classified as a ____ refrigerant on the safety matrix.
- B-1
- B-2
- A-2
- A-1
5: How far from the window does a relief valve need to be according to ASHRAE-15?
- At least 40'
- At least 30'
- There is no minimum for relief valve and windows.
- At least 20'
6: 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
7: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 10
- 15
- 24
- 18
8: 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
9: Direct systems using Group II refrigerants
- shall be allowed to be used for human comfort.
- shall not be used for air condition for human comfort
- shall be installed per instruction of the AHJ
- shall be installed in Class T machinery rooms
10: 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
11: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
12: A relief valve shall be located at least ___ above grade.
- 36'
- 10'
- 15'
- 25'
13: The gauge thickness required on a CO2 tank construction is
- 1/8"
- 3/32"
- 1/16"
- 5/16"
14: 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.
- 6.6, 6.6
- 3.0, 3.5
- 2.5, 3.0
- 2.5, 2.5
15: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can never change refrigerants
- Place sign, check for leaks, and insulate suction line
- Nothing must be done
- Make sure its compatible, notify owner, and notify AHJ.
16: How many groups of refrigerants are there?
- 1
- 3
- 7
- 5
17: Joints in refrigeration piping must be _____ before being covered?
- Leak tested
- Insulated
- Inspected
- Pressurized
18: The Department that certifies the transportation of refrigerant is the
- EPA
- DOT
- RSES
- EPO
19: A relief valve discharge capacity is rated in
- PSIA
- Pounds of air per minute.
- temperature minus pounds of air per second divided by release rate squared
- PSIG
20: 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
21: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
- evaporator
- compressor
- boiler
- outside the machinery room
22: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 100,000
- 10,000
- 100
- 1,000
23: There can be no airflow from an occupied space through a machine room unless what?
- System is high velocity
- System is ducted and sealed
- Duct is not located in the ceiling
- None of the above.
24: Each machinery room shall contain
- 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
- high and low pressure controls
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
25: Setting a pressure relief device shall not exceed ___ of the design pressure
- 80%
- 100%
- 90%
- 75%