Power and more

Question 1

Causes of Line Loss

Answer 1

1. The resistance of a conductor increases directly with its length. The longer the run, the greater the line loss. 2. The resistance of a conductor decreases in proportion to its cross-sectional area. The larger the conductor, the less the line loss. 3. Voltage drop varies directly with the load. The larger the amperage load, the larger the line loss.

Question 2

Allowable Voltage Drop

Answer 2

the amount of voltage drop that still allows acceptable performance from the equipment, and does not cause harm to the equipment.

Question 3

Inductance

Answer 3

a measure, in henrys, of the opposition to current change in an AC circuit (causing current to lag behind voltage). Inductance is exhibited by turns of wire with or without an iron core.

Question 4

Reactance

Answer 4

(X) a measure, in ohms, of the opposition to AC due to capacitance (XC) or inductance (XL).

Question 5

Def: Power Factor

Answer 5

in AC, the ratio of the actual or effective power in watts to the apparent power in volt-amperes, expressed as a percentage. Inductive loads cause the current to lag behind the voltage, resulting in a power factor of less than 100%.

Question 6

Capacitive Reactance

Answer 6

Produces a power factor of less than 100% if the circuit has a capacitive component such as an electronic ballast.
It causes current to lead voltage.
because a capacitor has the effect on the current waveform opposite to an inductor, capacitors are used to help correct the effects of inductive reactance.

Question 7

Power Factor

Answer 7

Ratio of True or to apparent power