Topics: ASHRAE/CMR
1: How many flammability classifications are refrigerants in?
- 5
- 3
- 7
- 2
2: Where a refrigeration or air conditioning system is installed,
- The company who installed the system must notify the fire department in the jurisdiction where installed
- it shall not be operated below prescribed pressuers
- the form or certificate shall be authorized by the Department of Public Safety
- A field inspection shall be made before it is put into service
3: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
- color-coded glass to determine type of refrigerant
- moisture indicators
- automatic closing shut-off valves
- All of the above
4: A relief valve shall be located at least ___ above grade.
- 36'
- 10'
- 15'
- 25'
5: What kind of material can't be used on the outlet of a relief valve?
- PVC
- Aluminum
- Stainless Steel
- Copper
6: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
7: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
8: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- fusible plug
- relief plug
- fusion plug
- rupture plug
9: 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 installed per instruction of the AHJ
- shall be allowed to be used for human comfort.
10: What refrigerant doesn't have to be classified?
- R-422A
- R-134A
- R-717
- R-718
11: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
- the same
- lower
- there is no Group B1 refrigerants
- higher
12: All electrical work done on refrigeration systems must comply with
- ASHREA-15 Section 9.2.1
- NEC and Massachusetts Modifications
- Department of Energy
- OSHA
13: The Board of Boilers adopts by reference
- MSCA Code
- Montreal Protocol Safety Code
- the 1997 ANSI/ASHRAE Safety Code
- the MACS Pressure Vessel Code of Massachusetts
14: Liquid level gauges must be provided with what?
- A relief valve
- Automatic shut-offs
- A low level mark
- A red line
15: Large mercantile occupancy is
- 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.
- 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 or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
16: A restaurant is classified as a
- mixed occupancy
- commercial occupancy
- public assembly occupancy
- large mercantile occupancy
17: The certificate of inspection
- shall be authorized by a notarized insurance company
- shall be posted and protected from dirt, water, and other elements
- 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
18: What refrigerant were phased out in 2004?
- R-134a
- R-12
- R-11
- R-22
19: Class A refrigerants are considered
- toxic
- non-toxic
- flammable
- non-flammable
20: Class T machine room
- shall have remote controls to stop the action of the refrigerant compressor
- has no flame producing apparatus permanently installed
- shall include closets used for setting equipment
- shall have refrigerant leak detecting systems installed inside and outside the room
21: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 55
- 15
- 50
- 75
22: What type of copper is not permitted on refrigeration systems?
- Type M
- Type L
- Type N
- Type K
23: Pressure vessels having an inside diameter of 6” or less shall be protected by
- 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
- a pressure relief device
- a fusible plug
24: Ammonia (NH3) is a group III refrigerant
- True
- False
25: R-22 is classified as a ____ refrigerant on the safety matrix.
- A-2
- B-2
- A-1
- B-1