Topics: ASHRAE/CMR
1: What type refrigerant is NOT ozone depleting?
- CFC
- HFC
- HCFC
- Halon
2: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 22 lbs
- 13.9 lbs
- 44 lbs
- 6.6 lbs
3: What is an example of institutional occupancy?
- Dorms
- Hospital
- Shopping mall
- Football stadium
4: R-22 is considered a(n)
- HCFC
- HFC
- HCFCH
- CFC
5: 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.
- 75
- 15
- 50
- 55
6: A pressure relief should be located at least _______ from windows and doors.
- 30'
- 20'
- 15'
- 25'
7: Where a refrigeration or air conditioning system is installed,
- 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
- it shall not be operated below prescribed pressuers
- the form or certificate shall be authorized by the Department of Public Safety
8: 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
9: What is a Category "D" fluid?
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
- A typical refrigerant used on newer air conditioning and heat pump ssytems
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
- Any fluid that exceeds 150 psig and has design temperature of over 366F
10: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
11: What type of copper is not permitted on refrigeration systems?
- Type N
- Type K
- Type M
- Type L
12: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
13: Each machinery room shall contain
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
- 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
14: Stop valves shall not be permitted between the system and the
- relief valve
- condenser
- bleed valve
- service valve
15: A movie theater would be considered a
- public assembly occupancy
- institutional occupancy
- mixed occupancy
- commercial occupancy
16: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
17: All machine rooms must be outfitted with a detector that _______?
- activates an audible alarm
- activates a visual alarm
- starts the ventilation system
- All of the above
18: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
- True
- False
19: R-22 falls under which safety classification?
- A-1
- B-1
- B-2
- A-2
20: 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
- first disconnect in
- breaker panel in
- load-side of the contactor in
- 24 volt secondary side of the Class 2 transformer to the thermostat
21: A High-Probability System
- is such that a leak of refrigerant from a failed connection will enter an unoccupied 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
- is such that any leak will cause injury or death to anyone within a 100 square foot area
22: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
- shall use fusible plugs
- do not need pressure relief protection
23: How many groups of refrigerants are there?
- 5
- 7
- 1
- 3
24: A professional or office building would be considered what type of occupancy?
- commercial
- mercantile
- business
- public assembly
25: A relief valve discharge capacity is rated in
- PSIG
- temperature minus pounds of air per second divided by release rate squared
- PSIA
- Pounds of air per minute.