Electrical Service

Question 1

What are the 5 things required to make a electrical circuit?

Answer 1

Voltage source
Conductors,
Control device (switch)
Over-current protection device
Load

Question 2

Series circuit

Answer 2

The sum of the resistance values of all components in circuit forms the total resistance.
Sum of all voltage drops equals the source voltage

Question 3

Ohms law

Answer 3

E=IxR

Question 4

Parallel

Answer 4

Current total is sum of a individual currents. Resistance total is less then smallest resistance. Voltage supplied to all leg is the same

Question 5

What is specific gravity of fully charged battery?

Answer 5

1.265

Question 6

When testing a battery the total variation between cells and be how much?

Answer 6

50 points

Question 7

What are the common electrical faults? (4)

Answer 7

Opens
High resistance
Short to voltage
Short to Ground

Question 8

What 3 things can be used to repair conductor insulation?

Answer 8

Electrical tape
Liquid tape
heat shrink tubing

Question 9

What is considered the strongest type of wire repair?

Answer 9

Western union splice

Question 10

What is the first step when trouble shooting a electrical issue?

Answer 10

Check source voltage

Question 11

What are the 3 styles of dash displays?

Answer 11

Liquid crystal display (LCD)
Light emitting diode display (LED)
Vacuum fluorescent display

Question 12

Multiplexing (def)

Answer 12

Sending multiple electronic messages through the same signal path at the same time

Question 13

What are the common communication data buses

Answer 13

J - 1708/1587
J - 1939
J - 560

Question 14

What current protection do modules on the multiplexed network have?

Answer 14

20 Amps internal current overload protection

Question 15

Where is the SRS module normally located?

Answer 15

Under or behind the drivers seat

Question 16

What are used in the SRS wiring connectors to prevent accidental deployment when servicing.

Answer 16

Shorting bars

Question 17

All electrical schematics are drawn in a _______________ condition and all the electrical components are drawn in their ______________ position

Answer 17

De-energized

Normal position

Question 18

Voltage drops from high resistances will do what to bulbs?

Answer 18

Cause them to illuminate dimly

Question 19

Manufacturers develop and publish ___________ _______ to guide you through trouble-shooting procedures.

Answer 19

Flow charts

Question 20

In a multiplexed module system the module are known as?

Answer 20

Nodes

Question 21

The Bus wire of a multiplexed system are known as?

Answer 21

The Backbone