Topics: ASHRAE/CMR
1: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 66
- 25
- 22
2: Class A refrigerants are considered
- non-flammable
- toxic
- non-toxic
- flammable
3: Who authorizes changes to the safety codes?
- Person who pulled the permit
- Contractor who last serviced the system.
- Board of Boilers
- Person in charge of the facility
4: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code
- licensed technician
- competent welder
- welder qualified
- licensed welder
5: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UV or UR
- UL and UM
- UL and UR
- UM or UL
6: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Moisture indicator
- Muffler
- Stop valve
- Foot valve
7: Whoever owns/uses a refrigeration or air conditioning system covered by this code
- must notify the Department of Public Safety prior to starting the system
- shall be licensed by the Commonwealth of Massachusetts according to CMR 522
- shall make application for inspections to the Chief of Inspectors
- None of the above
8: Joints in refrigeration piping must be _____ before being covered?
- Insulated
- Inspected
- Pressurized
- Leak tested
9: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- commercial occupancy
- public assembly occupancy.
- mercantile occupancy
- business occupancy
10: How far from the window does a relief valve need to be according to ASHRAE-15?
- There is no minimum for relief valve and windows.
- At least 40'
- At least 30'
- At least 20'
11: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 18
- 50
- 33
12: 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
13: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Relief valve
- T&P device
- Circuit Breaker
- Temperature limiter device
14: R-22 is classified as a ____ refrigerant on the safety matrix.
- B-1
- A-1
- A-2
- B-2
15: Which occupancy can ammonia be used in?
- industrial
- redifential
- depends on the quantity of freon
- commercial
16: Can ammonia be used on domestic system?
- no, unless there is proper ventilation system installed
- no
- yes, for systems under 10 tons
- yes
17: The gauge thickness required on a CO2 tank construction is
- 1/8"
- 5/16"
- 3/32"
- 1/16"
18: A relief valve shall be located at least ___ above grade.
- 25'
- 10'
- 36'
- 15'
19: Which refrigerant replaced R-12?
- R-410A
- R-134A
- R-407A
- R-22
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: What is an egress?
- A valve put on the low side of the system to prevent frosting
- An entrance or exit
- An escape route
- A code violation
22: _____ and its alloys are suitable for use with ammonia systems.
- Aluminum
- Copper
- Magnesium
- Zinc
23: A pressure relief should be located at least _______ from windows and doors.
- 25'
- 30'
- 20'
- 15'
24: Each machinery room shall contain
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
- high and low pressure controls
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
25: What pipe can not be used for refrigeration?
- L
- N
- K
- M