Topics: ASHRAE/CMR
1: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 80%
- 99%
- 75%
- 90%
2: A hotel is considered a _______ occupancy.
- residential
- commercial
- mercantile
- institutional
3: A declaration test is needed when the system contains more than
- 55 lbs
- 110 lbs
- 65 lbs
- 120 lbs
4: Relief valves are rated in
- gallons of water per hour
- pounds of air per hour
- gallons of water per minute
- pounds of air per minute
5: What is the minimum height refrigeration piping should be placed against walls?
- 7.25'
- 6'
- 72"
- Ceiling height
6: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 800F
- 700F
- 600F
- 1000F
7: The main purpose of a refrigerant detector in a machinery room is to
- inform there is a refrigerant leak int he system
- detect toxins in the air caused by a refrigerant leak
- to set off an alarm when there is refrigerant present inside the room
- all of the above
8: Ammonia (NH3) is a group III refrigerant
- True
- False
9: 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
- 400
- 250
- 350
10: Trichlorofluoromethane is the name of what refrigerant?
- R-11
- R-12
- R-502
- R-113
11: 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
12: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
13: How many flammability classifications are refrigerants in?
- 7
- 2
- 5
- 3
14: A Low-Probability System
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is such that a leak of refrigerant from a failed connection can not enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak form a failed connection or component of such system
15: Dual-pressure relief devices should be installed on
- vessels of 3 cubic feet or more
- vessels of 3 cubic feet or less
- vessels of 10 cubic feet or more
- vessels of 10 cubic feet or less
16: Who approves containers for refrigerants?
- D.O.E
- D.O.D
- D.O.T
- E.P.A
17: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
- R-718 is not rated unlimited because it's a dangerous refrigerant
- Because it's cheap
- Because it's water
- Because it's a non-flammable refrigerant
18: What is an example of institutional occupancy?
- Dorms
- Hospital
- Football stadium
- Shopping mall
19: The color code of a tank of ammonia is
- lavender
- light green
- white
- silver
20: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
- True
- False
21: How far from the ground does a relief valve need to be?
- At least 20' above grade
- Not more than 3' above grade
- At least 15' above grade
- At least 25' above grade
22: 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
23: What is the minimum size of the discharge pipe?
- Same size as the outlet of the relief valve
- One pipe size larger that the inlet of the relief valve
- Depends on size of manifold
- All of the above
24: A professional or office building would be considered what type of occupancy?
- business
- commercial
- public assembly
- mercantile
25: Liquid level gauges must be provided with what?
- A relief valve
- Automatic shut-offs
- A low level mark
- A red line