Topics: ASHRAE/CMR
1: When an inspection is needed, how often must it be done?
- every 24 months
- annually
- every 18 months
- every 36 months
2: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 550 lbs
- 330 lbs.
- 55 lbs
3: What type of pressure relief device is used on a CO2 system?
- Gate valve
- Fusible plug
- Rupture disk
- Glove valve
4: Most CFC's are
- flammable
- inert but toxic
- toxic
- inert
5: Ammonia is under what safety classification?
- B1
- B3
- B2
- A3
6: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
7: Doors communicating with outside from a mechanical room must be?
- Self-closing, aligned, fire door
- Self-closing, approved, fire door
- Self-closing, wooden, fire door
- Steel, approved, weather-stripped
8: R-410A is classified as a ____ refrigerant on the safety matrix.
- B-2
- A-1
- B-1
- A-2
9: B3 refrigerants are considered
- toxic and highly flammable
- non-toxic but flammable
- non-toxic but non-flammable
- toxic but non-flammable
10: Halo-carbon refrigerants cannot be used with what material?
- Stainless Steel
- Magnesium alloy
- Copper
- Aluminum
11: What kind of material can't be used on the outlet of a relief valve?
- Copper
- Stainless Steel
- Aluminum
- PVC
12: 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 its white
- When there are sprinklers above
- When it's used as part of a supply or return air system
13: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above
14: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 48
- 36
- 24
- 18
15: Evaporators within 18" of a heating coil must be equipped with a
- pressure relief device
- zone valve
- low limit control
- high limit control
16: What refrigerant doesn't have to be classified?
- R-134A
- R-718
- R-422A
- R-717
17: R-717 is
- water
- carbon dioxide
- trichloromethane
- ammonia
18: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Relief valve
- Temperature limiter device
- Circuit Breaker
- T&P device
19: 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 Fire Marshal that the system has been inspected and approved
- Notify the AHJ to let them know that the system been inspected
20: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by
- District Engineering Inspectors
- Commissioned Inspectors
- Master licensed Technician
- both a or b
21: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
22: _____ and its alloys are suitable for use with ammonia systems.
- Copper
- Magnesium
- Aluminum
- Zinc
23: Halogen refrigerants are corrosive to which type of metal?
- stainless steel
- copper
- magnesium
- black iron
24: R-11 belongs to Group
- A-2
- B-3
- A-1
- B-1
25: All electrical work done on refrigeration systems must comply with
- OSHA
- ASHREA-15 Section 9.2.1
- NEC and Massachusetts Modifications
- Department of Energy