Topics: ASHRAE/CMR
1: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
2: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class A machinery room
- Class B machinery room
- Class T machinery room
- Class M machinery room
3: R-123 belongs to Group
- B-2
- B-1
- A-3
- B-3
4: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 800F
- 600F
- 1000F
- 700F
5: Which refrigerant class listed below is the most flammable?
- B-2
- A-1
- A-3
- C-3
6: Who is permitted to access a refrigeration machine room?
- Any employee
- Authorized persons only
- Anyone, it's a completely safe area
- Contractors only
7: What do you need to do when you install a new system?
- Add refrigerant
- Insulate the suction line before you take a superheat reading
- Document the superheat and subcooling reading
- Have it inspected
8: A movie theater would be considered a
- institutional occupancy
- commercial occupancy
- mixed occupancy
- public assembly occupancy
9: How many groups of refrigerants are there?
- 7
- 3
- 5
- 1
10: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
11: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- CFC-11
- HCFC-123
- ammonia
- Lithium bromide
12: What is an example of institutional occupancy?
- Hospital
- Dorms
- Football stadium
- Shopping mall
13: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
- True
- False
14: Class A refrigerants are considered
- toxic
- flammable
- non-flammable
- non-toxic
15: A class B1 refrigerant is considered
- non-toxic and non-flammable
- non-toxic but highly flammable
- toxic and somewhat flammable
- toxic but non-flammable
16: The color code of a tank of ammonia is
- lavender
- white
- light green
- silver
17: What section of ASHRAE-15 governs pressure vessels?
- Section 7 ASHRAE-15 ASME VIII fired
- Section 6 ASHRAE-34 ASME VIII unfired
- OSHA
- Section 9 ASHRAE-15 ASME VIII unfired
18: Ammonia belongs to Group
- A-1
- B-2
- B-1
- A-2
19: What is the minimum height refrigeration piping should be placed against walls?
- 72"
- Ceiling height
- 6'
- 7.25'
20: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 55 lbs
- 500 lbs
- 660 lbs
- 330 lbs
21: Which refrigerant class listed below is the most flammable?
- A2
- C3
- B2
- A3
22: Liquid level gauges must be provided with what?
- A red line
- A relief valve
- A low level mark
- Automatic shut-offs
23: 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
24: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- does not require a pressure-limiting device
- shall have a pressure limiting device and a pressure relief valve installed
- shall be inspected by the Boiler of Inspectors bi-annually
- shall have a pressure limiting device installed on the high side of the system
25: 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
- welder qualified
- licensed technician
- competent welder
- licensed welder