Topics: All categories in the pool
1: A hissing noise at the expansion valve is a good indication that
- liquid is passing thru it
- nothing is passing thru
- expansion valve is oversized
- gas is passing thru it
2: A movie theater would be considered a
- institutional occupancy
- commercial occupancy
- public assembly occupancy
- mixed occupancy
3: In an air conditioning system, the unit of total heat energy content in an air/vapor mixture is
- Specific heat
- Enthalpy
- Latent heat
- Sensible heat
4: When energized, a normally open relay will be
- noisy
- depends on the type and class of the relay
- open
- closed
5: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- phosgene gas sening
- A group sensing
- CO Sensing
- refrigerant sensing
6: A micron is
- one millonths of a micrometer
- one millonths of a centimeter
- a larger unit of measurement than Hg
- one thousandths of a millimeter
7: _____ and its alloys are suitable for use with ammonia systems.
- Zinc
- Copper
- Magnesium
- Aluminum
8: What does an anemometer measure?
- voltage
- velocity
- temperature
- amperage
9: When an electronic bridge is in balance the bridge output will be
- 15 volts
- 1 volt
- 0 volts
- .01 volts
10: The color code of a tank of ammonia is
- light green
- white
- silver
- lavender
11: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.5
- 2.0
- 3.0
- 5.5
12: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the outdoors
- the return air ducted system
- the mechanical room housing the refrigeration system
- Machinery rooms need not be vented
13: On a pumpdown system, the liquid-line solenoid is controlled by the
- low-ambient controller
- low pressure switch
- defrost timer
- thermostat
14: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 550 lbs
- 330 lbs.
- 55 lbs
- 660 lbs
15: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 75%
- 100%
- 90%
- 80%
16: Which creates more of a heat load?
- 90% RH
- 70% RH
- 50% RH
- 30% RH
17: Heat is a form of
- matter
- energy
- power
- work
18: On a TXV, the purpose of an external equalizer is to?
- compensate for a pressure drop across the evaporator coil
- allow a greater adjustment spam
- Increase the pressure on the top of the power head diaphragm
- balance the evaporator load
19: All low-pressure chillers use which type of compressor?
- Scroll
- Reciprocating
- Rotary
- Centrifugal
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: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- explosion precautions must be taken
- the owner shall be informed
- gas masks must be worn
- no flames shall be permitted
22: 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
23: Booster compressors connect to the ____ side of the compressor
- vapor
- low side
- oil side
- liquid
24: A crankcase heater has a supplied voltage of 100 volts and is drawing 1.4 amps. What is the resistance?
- 104 ohms
- 80 ohms
- 71 ohms
- 27 ohms
25: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above