Topics: ASHRAE/CMR
1: When a refrigerating machinery room is used, the emergency procedures shall be posted
- on a conspicuous card located near the evaporator
- on a conspicuous card located near the compressor
- outside the room, immediately adjacent to each door
- inside the room, immediately adjacent to each door
2: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
3: Direct systems using Group II refrigerants
- 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
- shall be allowed to be used for human comfort.
4: What would be the classification of a church?
- Institutional
- Large mercantile
- Place of assembly
- Industrial
5: R-22 is considered a(n)
- HFC
- HCFC
- CFC
- HCFCH
6: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 3
- 2
- 5
- 1
7: Ammonia is under what safety classification?
- B2
- B1
- A3
- B3
8: What is the refrigerant chlorodifluoromethane?
- R-134a
- R-123
- R-12
- R-22
9: What section governs pressure vessels?
- Section ASHREA 34
- Section 8 ASHREA 15 ASME unfired
- OSHA
- Section 1 ASHREA 15 ASME fired
10: 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
11: What type of material can't be used on the outlet of a relief valve?
- Copper
- PVC
- Stainless steel
- Magnesium alloy
12: A Low-Probability 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 a failed connection can not enter the occupied space
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is a system highly likely to leak form a failed connection or component of such system
13: Liquid level gauges must be provided with what?
- A low level mark
- Automatic shut-offs
- A red line
- A relief valve
14: What is an egress?
- A valve put on the low side of the system to prevent frosting
- A code violation
- An entrance or exit
- An escape route
15: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 25
- 66
- 22
16: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
- public assembly occupancy
- institutional occupancy
- illegal occupancy
- commercial occupancy
17: Institutional occupancy is
- a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- None of the above
18: When should a relief valve start to function?
- Before the purge station discharges
- 10 psi before it's set pressure
- Two times it's working pressure
- At it's set pressure
19: R-123 belongs to Group
- B-3
- B-2
- A-3
- B-1
20: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
- When it's cold out
- When there is a malfunction on the high side
- When its warm out
- All of the above
21: 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
22: 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
- compressor
- outside the machinery room
- boiler
- evaporator
23: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 24
- 48
- 18
- 36
24: How many different groups of refrigerants are there?
- 11
- 3
- 15
- 7
25: How are refrigerant blends classified?
- Based on best case Fractionation
- Based on the oil used
- Blends don't have to be classified
- Based on worst case fractionation