Topics: ASHRAE/CMR
1: Liquid level gauges must be provided with what?
- Automatic shut-offs
- A relief valve
- A low level mark
- A red line
2: 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.
- 7.25'
- 8'4"
- 7.00'
- 9.00'
3: When a refrigerating machinery room is used, the emergency procedures shall be posted
- on a conspicuous card located near the compressor
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the evaporator
- inside the room, immediately adjacent to each door
4: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 15
- 25
- 10
- III
5: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 90
- 80
- 110
- 100
6: 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
7: Machinery rooms must be vented to ______?
- outdoors
- basement
- unoccupied spaces
- neutralizing tank
8: What type of copper is not permitted on refrigeration systems?
- Type K
- Type L
- Type N
- Type M
9: 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
10: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 2
- 1
- 3
- 5
11: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 100%
- 80%
- 90%
- 75%
12: 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
- 100
- 350
- 550
13: A High-Probability System
- is a system highly likely to leak form a failed connection or component of such system
- is such that a leak of refrigerant from a failed connection will enter an unoccupied 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 a failed connection will enter the occupied space
14: R-11 belongs to Group
- B-1
- B-3
- A-2
- A-1
15: Who approves containers for refrigerants?
- D.O.E
- D.O.D
- D.O.T
- E.P.A
16: What would be the classification of a prison?
- Large mercantile
- Industrial
- Place of assembly
- Institutional
17: How many refrigerant classifications are there for flammability?
- 1
- 7
- 2
- 3
18: Which refrigerant class listed below is the most flammable?
- C3
- A2
- A3
- B2
19: When must refrigeration system covered by the code be inspected?
- Annually and when installed
- Upon installation
- Not required
- Annually
20: NH3 is
- ammonia
- R-508A
- lithium bromide
- R-718
21: What is not a requirement of a class T machine room?
- tight fitting doors
- self-closing doors
- automatic ventilation
- fire hose connection to the building fire protection system
22: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- rupture plug
- fusion plug
- fusible plug
- relief plug
23: 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
24: A relief valve shall be located at least ___ above grade.
- 10'
- 36'
- 25'
- 15'
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