Topics: ASHRAE/CMR
1: How many different groups of refrigerants are there?
- 11
- 3
- 15
- 7
2: _____ alloys shall not be used in contact with an halogenated refrigerants.
- Magnesium
- Zinc
- Copper
- Nickel
3: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- Make sure its compatible, notify owner, and notify AHJ.
- you can never change refrigerants
- Place sign, check for leaks, and insulate suction line
- Nothing must be done
4: Stop valves shall not be permitted between the system and the
- relief valve
- bleed valve
- service valve
- condenser
5: 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
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: Halogen refrigerants are corrosive to which type of metal?
- stainless steel
- black iron
- copper
- magnesium
8: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
9: Class 3 refrigerants are
- highly flammable
- non-toxic
- non-flammable
- toxic
10: How many gallons of water do you need per pound of ammonia?
- 100
- 1
- 10
- 50
11: What is not a requirement of a class T machine room?
- tight fitting doors
- self-closing doors
- fire hose connection to the building fire protection system
- automatic ventilation
12: 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
13: All electrical work done on refrigeration systems must comply with
- ASHREA-15 Section 9.2.1
- NEC and Massachusetts Modifications
- Department of Energy
- OSHA
14: R-12. R-22, and R-40 are considered Group I refrigerants.
- True
- False
15: 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
16: 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.
17: All machine rooms must be outfitted with a detector that _______?
- activates an audible alarm
- activates a visual alarm
- starts the ventilation system
- All of the above
18: What would be the classification of a church?
- Institutional
- Large mercantile
- Place of assembly
- Industrial
19: Pressure vessels of 10 cubic feet or more gross volume shall use
- at least one rupture member
- a dual pressure-relief valve if charging into the atmosphere
- at least three means of discharge and/or rupture discs
- both a and b are correct
20: What refrigerant doesn't have to be classifted?
- R-711
- R-718
- R-717
- R-134a
21: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- over pressure protection and a rupture disc
- over pressure protection as well as a temperature protection device
- over pressure protection
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
22: 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.
- 80
- 110
- 100
- 90
23: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
24: Where a refrigeration or air conditioning system is installed,
- A field inspection shall be made before it is put into service
- The company who installed the system must notify the fire department in the jurisdiction where installed
- it shall not be operated below prescribed pressuers
- the form or certificate shall be authorized by the Department of Public Safety
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.
- 10
- 15
- 25
- 20