Topics: All categories in the pool
1: How many square inches per square foot?
- 24
- 144
- 98
- 64
2: Copper and its alloys shall not be used with ammonia
- True
- False
3: Who authorizes changes to the safety codes?
- Person in charge of the facility
- Person who pulled the permit
- Board of Boilers
- Contractor who last serviced the system.
4: Give an example of a secondary coolant?
- R-12
- R-717
- R-410A
- R-718
5: 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
- 15
- 25
- 10
6: The gauge thickness required on a CO2 tank construction is
- 1/16"
- 5/16"
- 3/32"
- 1/8"
7: The actual expansion curve of compression follows most nearly which one of the following curves?
- Pressure Temperature
- Isothermal
- Adiabatic
- Volume Temperature
8: Where can 50/50 solder be used on?
- suction line
- liquid line
- discharge line
- none of the above
9: What's the purpose of a megohmmeter?
- To measure low to very low resistance values
- To alternate the current in a DC circuit in order to calculate the total impedance of a circuit
- To measure very high resistances
- None of the above
10: Industrial occupancy is
- a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
- is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- Both a and b are correct
11: When can 50/50 solder be used?
- in the low side
- in the high side
- liquid and suction lines
- none of the above.
12: Ohm's Law indicates Amps X Resistance = ___________.
- Ohms
- Impedance
- Current
- Volts
13: What instrument is used to measure very high resistance?
- ammeter
- voltmeter
- meg ohmmeter
- tape measure
14: Which refrigerant class listed below is the most flammable?
- B-2
- A-3
- C-3
- A-1
15: A High-Probablity system
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- 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 failed connections will enter the occupied space
- is a system highly likely to leak from a failed connection or component of such system
16: The evaporator is a device to
- store liquid refrigerant
- remove heat from the refrigeration system
- Keep the compressor busy
- absorb heat into the refrigeration system
17: Liquid level gauges must be provided with what?
- Automatic shut-offs
- A relief valve
- A red line
- A low level mark
18: Large mercantile occupancy is
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
19: If the power element of an expansion valve should lose its charge the valve would
- underfeed the evaporator
- overfeed the evaporator
- go open
- go closed
20: A Lithium-bromide system is an absorption system that
- uses salts as an absorbent and lithium bromide as a refrigerant
- uses ammonia as a refrigerant and lithium bromide as an absorbent
- uses water as a refrigerant and lithium bromide as an absorbent
- uses water as a absorbent and lithium bromide as a refrigerant
21: In an air conditioning plant which an indirect low side, water is used inside of bring: the proper sequence of operating the plan is
- reset the expansion valve
- start the fan and circulating pump
- start the comrpessor
- reset the safety valve
22: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
23: In an electrical circuit, what is potential measured in?
- Ohms
- Volts
- Amps
- Herys
24: The heat picked up in the evaporator must equal to
- the heat giving by the condenser
- the heat gained by the condenser
- the heat of compression
- the heat lost by the medium being cooled
25: A start capacitor is wired in _____ with the start windings.
- junction
- series-parallel
- parallel
- series