Basic electricity

Question 1

One Kilowatt is equal to how many watts

Answer 1

1000 watts

Question 2

Whats law describe the most fundamental or basic relationship in an electrical circuit

Answer 2

Ohms law

Question 3

What are three element of ohms law

Answer 3

voltage current and resistance

Question 4

How would you write ohms law in a equation

Answer 4

E= I X R , R= E / I, I= E/R

Question 5

If the resistance in a DC circuit remains the same but the voltage double what happen to the amount of current

Answer 5

it also doubles

Question 6

In DC circuits what unit measures power

Answer 6

watts

Question 7

What three elements are required to form an electrical circuit

Answer 7

A source of electrical energy, A load or resistance to use electricity and wires or conductors to connect the source to the load

Question 8

DC circuits can take one of three forms or types what are they

Answer 8

series, parallel and complex

Question 9

A 24 volt lead battery has how many cells

Answer 9

twelve

Question 10

A fully charge lead acid battery has a specific gravity that varies between what two values

Answer 10

1.275 and 1.300

Question 11

You must apply a correction to the specific gravity reading of the electrolyte of a lead acid battery-when the temperature is outside-of what two values

Answer 11

whenever the temperature is less than 70 degrees or more than 90 degree Fahrenheit.

Question 12

what is the reason for having separate facilities for storing and serving nickel cadmium and lead acid batteries

Answer 12

The electrolyte in the two types of batteries is chemically opposite and the fumes from the one type can contaminate the electrolyte of the other type

Question 13

The state of charge of a nickel cadmium battery can not be determined by measuring the specific gravity of the electrolyte for what reason

Answer 13

Theres no significant change in the specific gravity of the electrolyte as the battery is charged or discharged

Question 14

Whats the principal advantage of Ac current over DC current

Answer 14

Power can me transmitted over long distances more efficiently and with smaller wires because the voltage can be easily increased or decreased by a transformer

Question 15

What are the three causes of opposition to current flow in an AC circuit

Answer 15

Resistance, inductive reactance and capacity reactance

Question 16

Define inductance

Answer 16

An induced voltage which is opposite in direction to the applied voltage

Question 17

What component creates capacitance in AC circuits

Answer 17

A capacitor

Question 18

How does a capacitor store electricity

Answer 18

The energy is stored in the form of an electrostatic charge or field that exists between two conductors separated by an insulator

Question 19

What property of an AC circuits is defined by the term impedance

Answer 19

The total opposition to current flow

Question 20

What are two reasons that might cause a nickel-cadmium battery to fail to deliver its rated capacity

Answer 20

Faculty cells or cell imbalance

Question 21

What electrical values are measured by a typical multimeter

Answer 21

Voltage, current and resistance