Topics: ASHRAE/CMR
1: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- mixed occupancy
- commercial occupancy
- institutional occupancy
- public assembly occupancy
2: What type of relief valve is used on a CO2 system?
- gate valve
- rupture disc
- fusible plug
- glove disc
3: How many refrigerant classifications are there for flammability?
- 3
- 7
- 2
- 1
4: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
5: R-717 is
- carbon dioxide
- water
- trichloromethane
- ammonia
6: 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.
- 250
- 350
- 400
- 100
7: How many gallons of water per pound of ammonia do you need?
- 15
- 5
- 1
- 20
8: 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
9: 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.
- 20
- 10
- 15
- 25
10: Stop valves shall not be permitted between the system and the
- condenser
- relief valve
- bleed valve
- service valve
11: How are refrigerant blends classified?
- Blends don't have to be classified
- Based on best case Fractionation
- Based on worst case fractionation
- Based on the oil used
12: How many refrigerant classifications are there for toxicity?
- 5
- 2
- 3
- 1
13: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
14: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 15
- 50
- 75
- 55
15: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- rupture plug
- relief plug
- fusible plug
- fusion plug
16: A relief valve discharge capacity is rated in
- Pounds of air per minute.
- temperature minus pounds of air per second divided by release rate squared
- PSIA
- PSIG
17: 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
18: High pressure controls should be set no higher than
- 80% of set point
- 90% of set point
- 25% of set point
- 10% of set point
19: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 100%
- 75%
- 80%
- 90%
20: What type of refrigerants are NOT flammable?
- CHC
- HFC
- HCFC
- All of the above
21: Which of the following are considered inorganic refrigerants?
- R-717 and R-718
- 410A and R-407C
- R-500 and R-502
- None of the above
22: Which refrigerant class listed below is the most flammable?
- A-3
- B-2
- C-3
- A-1
23: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
24: A Low-Probability System
- is a system highly likely to leak form a failed connection or component of such system
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is such that a leak of refrigerant from a failed connection can not enter the occupied space
- is such that a leak of refrigerant from a failed connection will enter the occupied space
25: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can't change refrigerants
- place sign, check for leaks, insulate
- nothing must be done
- make sure it's compatible, notify owner, notify A.H.J