Topics: All categories in the pool
1: A relief valve shall be located at least ___ above grade.
- 25'
- 36'
- 15'
- 10'
2: What is used to check very low pressure?
- Hygrometer
- Manometer
- Hydrometer
- Velometer
3: The start winding has _____ turns than the run winding.
- more
- less
- the same
- none of the above
4: What is an example of institutional occupancy?
- Shopping mall
- Football stadium
- Hospital
- Dorms
5: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- business occupancy
- commercial occupancy
- mercantile occupancy
- public assembly occupancy.
6: Copper and its alloys shall not be used with ammonia
- True
- False
7: The best way to determine the voltage requirement for an electrical component is to
- read the nameplate data
- check with the utility company
- read the voltage with a mulitmeter
- determine the capacity of the service panel
8: Absolute pressure is
- Gauge Pressure
- Atmospheric Pressure
- Gauge + Atmospheric Pressure + Pi
- none of the above
9: Who approves containers for refrigerants?
- D.O.D
- D.O.T
- D.O.E
- E.P.A
10: If a refrigerant leaving the condenser is 94F and the condensing temperature is 105F, the subcooling is
- 21F
- 11F
- 9F
- 29F
11: Sublimation occurs when
- gas is formed from a liquid
- ice melts and turns to water
- gas is formed directly from a solid
- liquid is formed from a gas
12: Low ambient controls are used when
- on air conditioning systems only
- always
- economizers are used
- when systems run all year round
13: The two float-type metering devices are the
- vapor float and the low-side float.
- liquid float and the low-side float
- high-side float and the low-side float
- liquid float and the vapor float
14: A single pole-double throw switch used how many wires excluding the ground wire?
- two
- four
- three
- five
15: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- shall have a pressure limiting device installed on the high side of the system
- shall be inspected by the Boiler of Inspectors bi-annually
- does not require a pressure-limiting device
- shall have a pressure limiting device and a pressure relief valve installed
16: Materials used in construction and installation materials used in the manufacture or installation of refrigerating equipment shall be suitable for conveying refrigerant and the refrigerant oils and will not deteriorate in the presence of what?
- Oil and water
- Water and soap
- Air and dirt
- Moisture and air
17: Increasing superheat will do what to your system?
- Nothing
- Increase gas flow
- Decrease liquid flow
- Increase liquid flow
18: How much refrigerant can be stored in a mechanical room outside of the system?
- 100
- 330
- 200
- 150
19: E = I X R is
- Ohms Law
- Amps Law
- Impedance Law
- Watts Law
20: When a refrigeration or air conditioning system is installed
- a field inspection shall be made before it is put into service
- it shall be approved by the owner for proper operation.
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall not be operated below prescribed pressures
21: A mixed occupancy occurs when two or more occupancies are located with the same building
- true
- false
22: Capacity control on an absorption system is typically accomplished by varying the
- speed of the condenser water circulator pump
- pressure setting on the system's rupture disc
- rate at which heat is supplied to the generator
- speed of the chilled water circulatory pump
23: Oils, classified as to source, are
- naphthalene, mixed, and paraffin
- naphthalene, paraffin, and castor
- animal, vegetable, and mineral
- animal, vegetable, and castor
24: The boiling point of a refrigerant is based on
- Temperature
- Heat content
- a pressure-temperature relationship
- None of the above.
25: When an electronic bridge is in balance the bridge output will be
- .01 volts
- 0 volts
- 1 volt
- 15 volts