Topics: ASHRAE/CMR
1: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
2: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
- fusible plug
- relief valve
- rupture disc
- all of the above
3: What is the refrigerant chlorodifluoromethane?
- R-134a
- R-22
- R-12
- R-123
4: What must be done to refrigerant pipes before being buried?
- Coated
- Certified
- Encased
- Leaked checked
5: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
6: Each machinery room shall contain
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
- high and low pressure controls
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
7: A hotel is considered a _______ occupancy.
- commercial
- institutional
- residential
- mercantile
8: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 55
- 50
- 15
- 75
9: Pressure vessels with an internal volume of 3 cubic feet or less
- do not need pressure relief protection
- shall use pressure relief devices
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
10: What is R-22?
- HFC
- Chlorofluoromethane
- CCFCM
- Chlorodifluoromethane
11: When can recovered refrigerants be reused?
- They can't
- Only when used in original owner's equipment
- Only if used in 30 days of recovery
- None of the above
12: Where a refrigeration or air conditioning system is installed,
- it shall not be operated below prescribed pressuers
- the form or certificate shall be authorized by the Department of Public Safety
- The company who installed the system must notify the fire department in the jurisdiction where installed
- A field inspection shall be made before it is put into service
13: What would be the classification for Stop & Shop grocery store?
- Large mercantile
- Place of assembly
- Instituional
- Industrial
14: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
- load-side of the contactor in
- 24 volt secondary side of the Class 2 transformer to the thermostat
- first disconnect in
- breaker panel in
15: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.5
- 2.0
- 5.5
- 3.0
16: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 5
- 3
- 1
- 2
17: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above
18: A Low-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 can not enter the occupied 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
19: What is not a requirement of a class T machine room?
- tight fitting doors
- self-closing doors
- fire hose connection to the building fire protection system
- automatic ventilation
20: How many groups of refrigerants are there?
- 1
- 3
- 5
- 7
21: 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
22: What is an example of institutional occupancy?
- Dorms
- Shopping mall
- Hospital
- Football stadium
23: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class B machinery room
- Class A machinery room
- Class M machinery room
- Class T machinery room
24: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 100%
- 75%
- 80%
- 90%
25: Class A refrigerants are considered
- non-toxic
- toxic
- non-flammable
- flammable