Topics: ASHRAE/CMR
1: Where are the three places that the discharge from an ammonia relief valve be piped?
- To chemical neutralizing tank only
- Underground, into drain, into mechanical room
- Atmosphere, Tank containing water, where the AHJ indicates.
- None of the above.
2: Single compound Refrigerants are classified by what two criteria?
- Temperature range and hazardousness
- Flammability and toxicity
- Weight and color
- Flammability and temperature range
3: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
- do not need pressure relief protection
- shall use fusible plugs
4: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
- the aggregate of the high side and low side
- the high side
- the low side
- 2.5 times the design pressure
5: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- the same
- lower
- higher
- there is no Group B1 refrigerants
6: Joints in refrigeration piping must be _____ before being covered?
- Leak tested
- Insulated
- Inspected
- Pressurized
7: Evaporators within 18" of a heating coil must be equipped with a
- zone valve
- pressure relief device
- high limit control
- low limit control
8: What refrigerant were phased out in 2004?
- R-11
- R-134a
- R-22
- R-12
9: Which occupancy can ammonia be used in?
- redifential
- depends on the quantity of freon
- commercial
- industrial
10: Who is permitted to access a refrigeration machine room?
- Any employee
- Anyone, it's a completely safe area
- Contractors only
- Authorized persons only
11: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)
- Pressure gauge
- Temperature gauge
- Sight glass gauge
- All of the above
12: What type of relief valve is used on low pressure centrifugal compressor systems?
- Spring-loaded relief valve
- Rupture disc
- Purge relief
- None of the above
13: All serviceable components of a refrigeration system shall be provided with
- manufactures instructions on start-up procedures
- service manuals
- safe access
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
14: Pipe identification labels are required when the system contains more than
- 120 lbs
- 55 lbs
- 65 lbs
- 110 lbs
15: A pressure relief should be located at least _______ from windows and doors.
- 15'
- 25'
- 20'
- 30'
16: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- annually
- quarterly
- bi-annually
- regularly
17: R-11 belongs to Group
- A-1
- A-2
- B-3
- B-1
18: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
19: Name a CFC refrigerant(s):
- R-11
- R-12
- R-123
- both a & b
20: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above
21: Ammonia (NH3) is a group III refrigerant
- True
- False
22: How are refrigerant blends classified?
- Based on the oil used
- Blends don't have to be classified
- Based on worst case fractionation
- Based on best case Fractionation
23: When air is ducted through a machine room that services occupied space, What must be done?
- Ducted and sealed
- Insulated and cross broke
- Flanged and gasketed
- Welded and seamed.
24: The discharge relief valve is located (9.4.6)
- on top of the condensor
- between the compressor and oil separator
- between the compressor and reciever
- between the compressor and the stop valve
25: 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