Topics: ASHRAE/CMR
1: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 36
- 48
- 18
- 24
2: What is R-22?
- CCFCM
- HFC
- Chlorodifluoromethane
- Chlorofluoromethane
3: What refrigerant doesn't have to be classifted?
- R-711
- R-718
- R-717
- R-134a
4: A movie theater would be considered a
- public assembly occupancy
- commercial occupancy
- institutional occupancy
- mixed occupancy
5: 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 high side
- the aggregate of the high side and low side
- 2.5 times the design pressure
- the low side
6: Direct systems using Group II refrigerants
- shall be allowed to be used for human comfort.
- shall not be used for air condition for human comfort
- shall be installed in Class T machinery rooms
- shall be installed per instruction of the AHJ
7: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Relief valve
- Temperature limiter device
- T&P device
- Circuit Breaker
8: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?
- Flush with R-11
- Flush with ammonia
- Flush with R-718
- Flush with RX-11
9: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- annually
- bi-annually
- quarterly
- regularly
10: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- low pressure
- design pressure
- high pressure
- critical pressure
11: The color code of a tank of ammonia is
- lavender
- silver
- white
- light green
12: Fusible plugs shall not be used with pressure vessels of
- 15 cubic feet or more
- 3 cubic feet or more
- 15 square feet or less
- 3 cubic feet or less
13: How many flammability classifications are refrigerants in?
- 7
- 3
- 5
- 2
14: 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
15: A class B1 refrigerant is considered
- toxic but non-flammable
- non-toxic but highly flammable
- non-toxic and non-flammable
- toxic and somewhat flammable
16: A professional or office building would be considered what type of occupancy?
- public assembly
- commercial
- business
- mercantile
17: Most CFC's are
- inert
- inert but toxic
- toxic
- flammable
18: What is not a requirement of a Class T machine room?
- Self-closing doors
- Fire hose connected to the building fire protection system.
- Automatic ventilation
- Tight fitting doors
19: What is an egress?
- An entrance or exit
- A code violation
- An escape route
- A valve put on the low side of the system to prevent frosting
20: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
- 50
- 15
- 75
- 20
21: How many different groups of refrigerants are there?
- 7
- 11
- 3
- 15
22: Ammonia (NH3) is a group III refrigerant
- True
- False
23: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
24: What is the minimum height refrigeration piping should be placed against walls?
- Ceiling height
- 6'
- 7.25'
- 72"
25: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above