The twisting force that must be developed by a motor to turn its load is called:
A) Torque. B) Torsion. C) Horsepower. D) Wattage.
[Ques. 2] Compared to electro-mechanical controls, pneumatic controls can more easily:
A) Provide proportional or modulating control. B) Control small appliances.
C) Control residential air-conditioning systems. D) On-off control.
[Ques. 3] The power wire for an electric furnace should be:
A) No larger than 10 AWG in order to avoid voltage drop.
B) 12 AWG in most cases.
C) Sized to handle the minimum circuit ampacity on the data plate.
D) The same wire gauge as the internal wiring in the furnace.
[Ques. 4] What are two-position controls?
A) Two-position controls will work correctly on either side of the electrical circuit.
B) Two-position controls simply stop and start devices to maintain the desired condition.
C) Two-position controls incorporate a normal operating setting and an energy-saving economy mode.
D) Two-position controls can be mounted either horizontally or vertically and still operate correctly.
[Ques. 5] AC induction motor speed is determined by the current frequency (Hz) and the number of:
A) Start windings. B) Run windings. C) Motor poles. D) Speed taps.
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