Topics: ASHRAE/CMR
1: B3 refrigerants are considered
- toxic and highly flammable
- toxic but non-flammable
- non-toxic but flammable
- non-toxic but non-flammable
2: What is an example of institutional occupancy?
- Hospital
- Shopping mall
- Football stadium
- Dorms
3: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
4: What type of relief valve is used on low pressure centrifugal compressor systems?
- Spring-loaded relief valve
- Rupture disc
- Purge relief
- None of the above
5: A positive displacement compressor is
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
- 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
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
6: A professional or office building would be considered what type of occupancy?
- mercantile
- commercial
- public assembly
- business
7: R-11 belongs to Group
- B-1
- B-3
- A-2
- A-1
8: Class T machine room
- shall include closets used for setting equipment
- has no flame producing apparatus permanently installed
- shall have remote controls to stop the action of the refrigerant compressor
- shall have refrigerant leak detecting systems installed inside and outside the room
9: Indirect systems using Group II refrigerants
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
- shall be used in refrigeration system in excess of 1,000 lbs
- shall be used in refrigeration system less than 1,000 lbs
- shall be used for mechanical equipment only
10: How many different groups of refrigerants are there?
- 7
- 15
- 11
- 3
11: Liquid level gauges must be provided with what?
- Automatic shut-offs
- A relief valve
- A low level mark
- A red line
12: What type refrigerant is NOT ozone depleting?
- Halon
- HFC
- CFC
- HCFC
13: What was the main reason for enacting the no venting rule of July 1, 1992?
- Ozone depletion
- Green house effect
- Global warming potential
- All of the above
14: How far from the ground does a relief valve need to be?
- At least 25' above grade
- At least 20' above grade
- At least 15' above grade
- Not more than 3' above grade
15: What does safe access mean?
- A clear unobstructed path to the equipment and controls
- Locked doors
- OSHA approved
- Well-lit exit signs
16: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- over pressure protection as well as a temperature protection device
- over pressure protection and a rupture disc
- over pressure protection
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
17: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Muffler
- Stop valve
- Foot valve
- Moisture indicator
18: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
19: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
- fusible plug
- relief valve
- rupture disc
- all of the above
20: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- high pressure
- critical pressure
- low pressure
- design pressure
21: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- annually
- regularly
- quarterly
- bi-annually
22: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
23: What is not a requirement of a class T machine room?
- tight fitting doors
- self-closing doors
- automatic ventilation
- fire hose connection to the building fire protection system
24: Stop valves shall not be permitted between the system and the
- bleed valve
- relief valve
- condenser
- service valve
25: Can you use Ammonia in industrial applications?
- No, never
- When mixed with R-718
- Yes, Under certain condidtions
- Yes, always