Topics: ASHRAE/CMR
1: A Category D fluid
- is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
- is when the design pressure does not exceed 150 psi
- a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
- Both a and b are correct
2: Ammonia belongs to Group
- A-1
- B-2
- B-1
- A-2
3: Which refrigerant class listed below is the most flammable?
- C3
- B2
- A3
- A2
4: Which refrigerant replaced R-12?
- R-410A
- R-22
- R-407A
- R-134A
5: What kind of material can't be used on the outlet of a relief valve?
- PVC
- Aluminum
- Stainless Steel
- Copper
6: 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
7: Pressure vessels with an internal volume of 3 cubic feet or less
- do not need pressure relief protection
- shall use pressure relief devices
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
8: 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
9: What is the minimum height refrigeration piping should be placed against walls?
- 7.25'
- Ceiling height
- 72"
- 6'
10: 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.
11: Doors communicating with outside from a mechanical room must be?
- Self-closing, wooden, fire door
- Self-closing, approved, fire door
- Steel, approved, weather-stripped
- Self-closing, aligned, fire door
12: A relief valve discharge capacity is rated in
- temperature minus pounds of air per second divided by release rate squared
- PSIA
- PSIG
- Pounds of air per minute.
13: Where are the three places that the discharge from an ammonia relief valve be piped?
- atmosphere, tank containing water, where the A.H.J. indicates
- underground, into drain, into mechanical room
- to chemical neutralizing tank only
- none of the above
14: How far from the ground does a relief valve need to be?
- At least 25' above grade
- Not more than 3' above grade
- At least 20' above grade
- At least 15' above grade
15: When an inspection is needed, how often must it be done?
- annually
- every 18 months
- every 36 months
- every 24 months
16: What section of ASHRAE-15 governs pressure vessels?
- OSHA
- Section 7 ASHRAE-15 ASME VIII fired
- Section 6 ASHRAE-34 ASME VIII unfired
- Section 9 ASHRAE-15 ASME VIII unfired
17: A restaurant is classified as a
- mixed occupancy
- public assembly occupancy
- large mercantile occupancy
- commercial occupancy
18: A declaration test is needed when the system contains more than
- 55 lbs
- 120 lbs
- 65 lbs
- 110 lbs
19: How much refrigerant can be stored in a mechanical room outside of the system?
- 330
- 150
- 100
- 200
20: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 6.6
- 330
- 110
- 1,000
21: Refrigerants shall be classified by
- toxicity and flammability
- maximum permissible quantities of each group
- requirements for commercial, industrial, and residential occupancies
- color codes
22: What type of pressure relief device is used on a CO2 system?
- Fusible plug
- Gate valve
- Glove valve
- Rupture disk
23: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the mechanical room housing the refrigeration system
- the return air ducted system
- Machinery rooms need not be vented
- the outdoors
24: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- high pressure
- low pressure
- design pressure
- critical pressure
25: 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.
- 15
- 10
- 25
- 20