Topics: ASHRAE/CMR
1: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
2: A class B2 refrigerant is considered
- toxic and non-flammable
- non-toxic and highly flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
3: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- Place sign, check for leaks, and insulate suction line
- Nothing must be done
- you can never change refrigerants
- Make sure its compatible, notify owner, and notify AHJ.
4: Class T machine room
- shall include closets used for setting equipment
- has no flame producing apparatus permanently installed
- shall have remote controls to stop the action of the refrigerant compressor
- shall have refrigerant leak detecting systems installed inside and outside the room
5: No open flames are allowed in the machinery room unless?
- Approved by the installing contractor
- Approved by the authorized person
- Only when combustion air is provided from outside of the machinery room
- Never can be allowed
6: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
- color-coded glass to determine type of refrigerant
- moisture indicators
- automatic closing shut-off valves
- All of the above
7: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 48
- 36
- 18
- 24
8: Who authorizes changes to the safety codes?
- Board of Boilers
- Person who pulled the permit
- Contractor who last serviced the system.
- Person in charge of the facility
9: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
10: How far from the ground does a relief valve need to be?
- At least 25' above grade
- At least 20' above grade
- At least 15' above grade
- Not more than 3' above grade
11: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- mercantile occupancy
- public assembly occupancy.
- commercial occupancy
- business occupancy
12: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 15
- 25
- 10
- III
13: What kind of material can't be used on the outlet of a relief valve?
- Copper
- PVC
- Stainless Steel
- Aluminum
14: Ammonia (NH3) is a group III refrigerant
- True
- False
15: What is R-22?
- HFC
- Chlorodifluoromethane
- CCFCM
- Chlorofluoromethane
16: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 2
- 1
- 3
- 5
17: What do you need to do when you install a new system?
- Document the superheat and subcooling reading
- Insulate the suction line before you take a superheat reading
- Have it inspected
- Add refrigerant
18: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 22 lbs
- 13.9 lbs
- 6.6 lbs
- 44 lbs
19: What would be the classification of a prison?
- Large mercantile
- Industrial
- Place of assembly
- Institutional
20: 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
21: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the occupied space
- is a system highly likely to leak from a failed connection or component of such system
- 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
22: R-22 is classified as a ____ refrigerant on the safety matrix.
- A-1
- A-2
- B-1
- B-2
23: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
24: What is the refrigerant dichlorodifluoromethane?
- R-134A
- R-22
- R-123
- R-12
25: All electrical work done on refrigeration systems must comply with
- Department of Energy
- ASHREA-15 Section 9.2.1
- OSHA
- NEC and Massachusetts Modifications