What is the impedance of a single-phase inductive circuit having a voltage of 240 V and a current ...

What is the impedance of a single-phase inductive circuit having a voltage of 240 V and a current flow of 10 A?

A) 10 A/240 V = 0.042
impedance
B) 240 V/10 A = 24
impedance
C) 240 V 10 A = 2,400
impedance
D) Impedance cannot be calculated using only volts and amps.

[Ques. 2] Vacuum pumps are rated by:

A) Blank-off pressure. B) CFM capacity and blank-off pressure.
C) Inches of mercury vacuum. D) CFM capacity.

[Ques. 3] Assuming that atmospheric pressure is 29.92 in Hg, which of the following measures is a perfect vacuum?

A) 0 in Hg vacuum B) 29.92 in Hg vacuum
C) 9.92 in Hg vacuum D) 20 in Hg vacuum

[Ques. 4] Why should some refrigerants NOT be recovered?

A) Older machines may hold toxic chemicals.
B) Many machines hold too little refrigerant to recover.
C) Type III refrigerant cannot be reused.
D) Older refrigerants have mostly dissipated already.

[Ques. 5] Ohm's law is a mathematical formula that describes the relationship between:

A) Volts, amps, and ohms. B) Watts, volts, and amps.
C) Volts, amps, ohms, and watts. D) Ohms, watts, and volts.

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What is the impedance of a single-phase inductive circuit having a voltage of 240 V and a current ...

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