Topics: ASHRAE/CMR
1: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- mercantile occupancy
- public assembly occupancy.
- commercial occupancy
- business occupancy
2: A class A3 refrigerant is considered
- toxic and non-flammable
- non-toxic and non-flammable
- toxic and somewhat flammable
- non-toxic but highly flammable
3: A positive displacement compressor is
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
- is a reciprocating type compressor with 2 or more pistons
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
4: When an inspection is needed, how often must it be done?
- every 18 months
- every 36 months
- every 24 months
- annually
5: How many refrigerant classifications are there for toxicity?
- 3
- 5
- 2
- 1
6: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
7: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UM or UL
- UL and UR
- UV or UR
- UL and UM
8: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- public assembly occupancy
- commercial occupancy
- mixed occupancy
- institutional occupancy
9: Name three things that must be done when changing refrigeration lubricant?
- Make sure it's compatible, notify owner, notify AHJ
- You can't change lubricants.
- Nothing must be done
- Place sign, check for leaks, insulate
10: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
11: What must be done to refrigerant pipes before being buried?
- Coated
- Encased
- Leaked checked
- Certified
12: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.0
- 2.5
- 3.0
- 5.5
13: Halo-carbon refrigerants cannot be used with what material?
- Aluminum
- Stainless Steel
- Magnesium alloy
- Copper
14: A class B1 refrigerant is considered
- toxic but non-flammable
- non-toxic but highly flammable
- non-toxic and non-flammable
- toxic and somewhat flammable
15: What do you need to do when you install a new system?
- Insulate the suction line before you take a superheat reading
- Document the superheat and subcooling reading
- Add refrigerant
- Have it inspected
16: 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
17: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
18: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can't change refrigerants
- make sure it's compatible, notify owner, notify A.H.J
- nothing must be done
- place sign, check for leaks, insulate
19: How many CFMs are required per square foot of commercial office occupied space
- 5 CFM
- 15 CFM
- .5 CFM
- 20 CFM
20: Ammonia (NH3) is a group III refrigerant
- True
- False
21: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 55 lbs
- 550 lbs
- 330 lbs.
22: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.
- 2.5, 2.5
- 6.6, 6.6
- 2.5, 3.0
- 3.0, 3.5
23: What refrigerant doesn't have to be classifted?
- R-711
- R-718
- R-717
- R-134a
24: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
- 36
- 48
- 18
- 24
25: All serviceable components of a refrigeration system shall be provided with
- safe access
- service manuals
- manufactures instructions on start-up procedures
- name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code