Topics: ASHRAE/CMR
1: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
2: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- over pressure protection
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
- over pressure protection and a rupture disc
- over pressure protection as well as a temperature protection device
3: Name three things that must be done when changing refrigeration lubricant?
- You can't change lubricants.
- Nothing must be done
- Place sign, check for leaks, insulate
- Make sure it's compatible, notify owner, notify AHJ
4: Halo-carbon refrigerants cannot be used with what material?
- Aluminum
- Copper
- Stainless Steel
- Magnesium alloy
5: The discharge relief valve is located (9.4.6)
- between the compressor and reciever
- between the compressor and oil separator
- between the compressor and the stop valve
- on top of the condensor
6: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
7: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- shall be inspected by the Boiler of Inspectors bi-annually
- shall have a pressure limiting device installed on the high side of the system
- does not require a pressure-limiting device
- shall have a pressure limiting device and a pressure relief valve installed
8: When a refrigeration or air conditioning system is installed
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall be approved by the owner for proper operation.
- a field inspection shall be made before it is put into service
- it shall not be operated below prescribed pressures
9: When air is ducted through a machine room that services occupied space, What must be done?
- Ducted and sealed
- Insulated and cross broke
- Welded and seamed.
- Flanged and gasketed
10: How are refrigerant blends classified?
- Blends don't have to be classified
- Based on best case Fractionation
- Based on worst case fractionation
- Based on the oil used
11: What type of copper is not permitted on refrigeration systems?
- Type K
- Type N
- Type L
- Type M
12: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- rupture plug
- relief plug
- fusible plug
- fusion plug
13: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- low side of the system
- the liquid side of the system
- high side of the system
- the vapor side of the system
14: What pipe can not be used for refrigeration?
- L
- K
- M
- N
15: Most CFC's are
- flammable
- toxic
- inert but toxic
- inert
16: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by
- District Engineering Inspectors
- Commissioned Inspectors
- Master licensed Technician
- both a or b
17: What refrigerant doesn't have to be classifted?
- R-717
- R-134a
- R-711
- R-718
18: A professional or office building would be considered what type of occupancy?
- business
- commercial
- mercantile
- public assembly
19: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
- the ASME Boiler and Pressure Vessel Code
- Section 11.3.1.5 ASHRAE 15 Standard
- the ANSI Standard 10.7.2
- both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5
20: How many refrigerant classifications are there for flammability?
- 3
- 7
- 2
- 1
21: A class B1 refrigerant is considered
- non-toxic but highly flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
- toxic but non-flammable
22: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
23: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
24: Ammonia (NH3) is a group III refrigerant
- True
- False
25: A restaurant is classified as a
- public assembly occupancy
- commercial occupancy
- mixed occupancy
- large mercantile occupancy