Topics: ASHRAE/CMR
1: What is an example of institutional occupancy?
- Dorms
- Shopping mall
- Hospital
- Football stadium
2: R-22 is classified as a ____ refrigerant on the safety matrix.
- A-1
- B-2
- A-2
- B-1
3: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- Because it's water
- Because it's cheap
- Because it's a non-flammable refrigerant
- R-718 is not rated unlimited because it's a dangerous refrigerant
4: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
5: What kind of material can't be used on the outlet of a relief valve?
- Stainless Steel
- Aluminum
- Copper
- PVC
6: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?
- Flush with ammonia
- Flush with RX-11
- Flush with R-718
- Flush with R-11
7: Which occupancy can ammonia be used in?
- commercial
- depends on the quantity of freon
- industrial
- redifential
8: Evaporators within 18" of a heating coil must be equipped with a
- low limit control
- pressure relief device
- high limit control
- zone valve
9: 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
10: Institutional occupancy is
- a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- None of the above
11: What type of copper is not permitted on refrigeration systems?
- Type M
- Type L
- Type N
- Type K
12: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 5
- 3
- 1
- 2
13: A class B2 refrigerant is considered
- non-toxic and highly flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
- toxic and non-flammable
14: When a refrigeration or air conditioning system is installed
- a field inspection shall be made before it is put into service
- it shall be approved by the owner for proper operation.
- it shall not be operated below prescribed pressures
- the form of certificate shall be authorized by the Department of Pubic safety
15: When should a relief valve start to function?
- Two times it's working pressure
- Before the purge station discharges
- 10 psi before it's set pressure
- At it's set pressure
16: How many groups of refrigerants are there?
- 1
- 3
- 5
- 7
17: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- fusible plug
- fusion plug
- rupture plug
- relief plug
18: Industrial occupancy is
- a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
- is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- Both a and b are correct
19: How are refrigerant blends classified?
- Based on worst case fractionation
- Based on the oil used
- Blends don't have to be classified
- Based on best case Fractionation
20: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- 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
- When there are sprinklers above
21: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a pressure relief device
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- a fusible plug
- either a fusible plug or a pressure relief device
22: The Department that certifies the transportation of refrigerant is the
- EPA
- RSES
- DOT
- EPO
23: How far from the window does a relief valve need to be according to ASHRAE-15?
- There is no minimum for relief valve and windows.
- At least 40'
- At least 20'
- At least 30'
24: Liquid level gauges must be provided with what?
- A low level mark
- A relief valve
- Automatic shut-offs
- A red line
25: _____ and its alloys are suitable for use with ammonia systems.
- Copper
- Magnesium
- Zinc
- Aluminum