Topics: ASHRAE/CMR
1: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
- Class A machinery room
- Class M machinery room
- Class B machinery room
- Class T machinery room
2: Which refrigerant class listed below is the most flammable?
- A3
- C3
- A2
- B2
3: What section governs pressure vessels?
- OSHA
- Section ASHREA 34
- Section 1 ASHREA 15 ASME fired
- Section 8 ASHREA 15 ASME unfired
4: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
5: A positive displacement compressor is
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
- 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
6: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 1,000
- 330
- 6.6
- 110
7: A class B2 refrigerant is considered
- toxic and non-flammable
- non-toxic and non-flammable
- non-toxic and highly flammable
- toxic and somewhat flammable
8: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- of Group B2 refrigerant shall be prohibited
- shall not be prohibited
- shall be prohibited
9: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When there are sprinklers above
- When there is a space 6' or more above it
- When it's used as part of a supply or return air system
- When its white
10: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 50
- 350
- 550
- 100
11: The certificate of inspection
- shall be posted and protected from dirt, water, and other elements
- shall be authorized by a notarized insurance company
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be posted on the compressor shell or electrical panel at the unit
12: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a fusible plug
- a pressure relief device
- either a fusible plug or a pressure relief device
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
13: All electrical work done on refrigeration systems must comply with
- OSHA
- NEC and Massachusetts Modifications
- Department of Energy
- ASHREA-15 Section 9.2.1
14: Halogen refrigerants are corrosive to which type of metal?
- black iron
- magnesium
- stainless steel
- copper
15: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 90%
- 80%
- 100%
- 75%
16: 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
17: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 100
- 250
- 350
- 400
18: Large mercantile occupancy is
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
19: What refrigerant is an inorganic compound?
- R-410A
- Ammonia
- R-132A
- R-22
20: What is an egress?
- An escape route
- An entrance or exit
- A valve put on the low side of the system to prevent frosting
- A code violation
21: Direct systems using Group II refrigerants
- shall not be used for air condition for human comfort
- shall be installed in Class T machinery rooms
- shall be allowed to be used for human comfort.
- shall be installed per instruction of the AHJ
22: 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
23: What would be the classification of a church?
- Large mercantile
- Industrial
- Place of assembly
- Institutional
24: Evaporators within 18" of a heating coil must be equipped with a
- zone valve
- low limit control
- pressure relief device
- high limit control
25: Fusible plugs shall not be used with pressure vessels of
- 15 cubic feet or more
- 15 square feet or less
- 3 cubic feet or less
- 3 cubic feet or more