Topics: All categories in the pool
1: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
- 14 days
- 1 week
- 2 months
- 30 days
2: When a refrigerating machinery room is used, the emergency procedures shall be posted
- inside the room, immediately adjacent to each door
- on a conspicuous card located near the evaporator
- outside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
3: If two 500 ohm resistors are connected in series, the resistance will be
- 1000 ohms
- 200 ohms
- 20 ohms
- 500 ohms
4: What is the minimum height refrigeration piping should be placed against walls?
- Ceiling height
- 72"
- 7.25'
- 6'
5: A high side float is a
- float type switch that stops the compressor when the pressure on the high side becomes too high
- float type valve that controls the crankcase oil level
- metering device used on critically charged systems that controls the level of the liquid refrigerant in the high pressure side of the system.
- float type valve that controls the amount of refrigerant stored in the receiver
6: Stop valves shall not be permitted between the system and the
- relief valve
- service valve
- condenser
- bleed valve
7: What is the leaving chilled water set point for water chiller systems?
- 55F
- 38F
- 45F
- 66F
8: Aluminum, Zinc, Magnesium, or their alloys shall not be used in contact with
- trichlorotrifluoromethane
- methyl chloride
- ammonia
- R-718
9: How much clearance do you need around the perimeter of electrical panels?
- 36"
- 24"
- 18"
- 12"
10: The 4 basic methods of determining whether the proper amount of refrigerant is being introduced into the system are
- sight glass, weight, paper method, and frost line.
- sight glass, weight, pressure, and frost line
- sight glass, weight, pressure, and dipstick
- Buss-eye, weight, pressure, and frost line
11: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 100,000
- 10,000
- 1,000
- 100
12: All low-pressure chillers use which type of compressor?
- Reciprocating
- Scroll
- Centrifugal
- Rotary
13: Heat cannot of itself, pass from a
- cold to a warmer body
- warm to a colder body
- state of hot energy to a state of cold energy
- None of the above
14: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Foot valve
- Moisture indicator
- Stop valve
- Muffler
15: 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
16: What is potential measured in?
- Henrys
- Ohms
- Volts
- Amps
17: How many gallons of water per pound of ammonia do you need?
- 15
- 5
- 20
- 1
18: What section governs pressure vessels?
- OSHA
- Section 1 ASHREA 15 ASME fired
- Section 8 ASHREA 15 ASME unfired
- Section ASHREA 34
19: In a properly balanced system with valves open and properly adjusted, if the suction line is warm to the touch, its because of
- not enough oil in the system
- low head pressure
- oil in evaporator
- moisture in the system
20: 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
21: Name three things that must be done when changing refrigeration lubricant?
- Make sure it's compatible, notify owner, notify AHJ
- Place sign, check for leaks, insulate
- Nothing must be done
- You can't change lubricants.
22: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
23: Class 3 refrigerants are
- non-toxic
- highly flammable
- toxic
- non-flammable
24: By using nitrogen within a pipe during brazing operation,
- Discoloration is prevented
- Copper oxide formation is prevented
- Exterior scale formation is minimized
- The explosion hazard is confined
25: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 6.6 lbs
- 44 lbs
- 13.9 lbs
- 22 lbs