Topics: ASHRAE/CMR
1: What section governs pressure vessels?
- OSHA
- Section 1 ASHREA 15 ASME fired
- Section 8 ASHREA 15 ASME unfired
- Section ASHREA 34
2: What refrigerant doesn't have to be classified?
- R-717
- R-718
- R-422A
- R-134A
3: Class T machine room
- shall have refrigerant leak detecting systems installed inside and outside the 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
4: Ammonia can come in contact with _______ ?
- Copper tubing
- Aluminum
- Brass
- Copper
5: What is Trichlorotrifluoromethane?
- R-13
- R-12
- R-113
- R-11
6: The gauge thickness required on a CO2 tank construction is
- 5/16"
- 3/32"
- 1/16"
- 1/8"
7: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Circuit Breaker
- Relief valve
- Temperature limiter device
- T&P device
8: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
- 10
- 20
- 25
- 15
9: Class A refrigerants are considered
- non-flammable
- toxic
- flammable
- non-toxic
10: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 100
- 90
- 80
- 110
11: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 80%
- 90%
- 100%
- 75%
12: How many refrigerant classifications are there for flammability?
- 1
- 3
- 2
- 7
13: What is an egress?
- A code violation
- An escape route
- An entrance or exit
- A valve put on the low side of the system to prevent frosting
14: There can be no airflow from an occupied space through a machine room unless what?
- System is high velocity
- System is ducted and sealed
- Duct is not located in the ceiling
- None of the above.
15: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 7.00'
- 8'4"
- 9.00'
- 7.25'
16: Pressure vessels nameplate markings must be compliant with the
- ASHRAE 34 Standards
- CMR-588 & CMR-528
- ASME Boiler and Pressure Vessel Code
- All of the Above
17: Ammonia (NH3) is a group III refrigerant
- True
- False
18: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is such that a leak of refrigerant from failed connections will 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 from a failed connection or component of such system
19: Which refrigerant class listed below is the most flammable?
- A-1
- C-3
- A-3
- B-2
20: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
21: 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
22: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- do not need pressure relief protection
23: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- explosion precautions must be taken
- gas masks must be worn
- no flames shall be permitted
- the owner shall be informed
24: Which refrigerant class listed below is the most flammable?
- B2
- A3
- A2
- C3
25: 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