In a series circuit, total resistance is determined by:
A) Dividing resistance into amperage.
B) Dividing voltage into the current.
C) Adding the sum of all individual resistances.
D) Total resistance cannot be determined in a series circuit.
[Ques. 2] The three essential requirements for a useful electric circuit are:
A) A power source, a magnetic field, and a path for current flow.
B) A magnetic field, a path for current flow, and a switch.
C) A power source, a path for current flow, and a switch.
D) A power source, a path for current flow, and an electrical load.
[Ques. 3] A refrigeration system dataplate states that the low-side test pressure is 150 psig. This means that:
A) The low side should not be pressurized above 150 psig.
B) The low-side pressure should be 150 psig when the system is running its self-test.
C) The low side should operate with a pressure of 150 psig at all times.
D) The low-side pressure will be 150 psig when the system is operating at design conditions.
[Ques. 4] An air conditioner with a fixed-restriction metering device is operating with an evaporator saturation temperature of 40F and a suction line temperature of 42F. The factory-specified superheat for the current operating condition is 12F. After checking the airflow and determining that it is within specifications, the technician should:
A) Recover charge because the system is overcharged.
B) Add charge because the system is undercharged.
C) Leave the charge alone because it is cooling even better than factory specifications.
D) Move some of the charge from the low side of the system to the high side of the system to balance the charge.
[Ques. 5] The frequency of AC power is measured in:
A) Henrys. B) Coulombs. C) Hertz. D) Faradays.
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