Off Road Electrical Circuit Service

Question 1

All electrical schematics are drawn in a de-energized condition and all the electrical components are drawn in the:

a. closed position
b. open position
c. normal position
d. abnormal positon

Answer 1

c. normal position

Question 2

Ohms Law is used in calculating values in electrical circuits. E is the symbol for electromotive force measured in volts (V), I is the symbol for Intensity of current flow, measured in Amperes (A) and R is the symbol for Resistance to current flow, measured in ohms. What is the correct mathematical expression for ohms law?

a. E=IxR
b. I=E/R
c. R=E/I
d. all of the above

Answer 2

d. all of the above

Question 3

High electrical resistances in electrical circuits will cause voltage drops. Voltage drops that occur in equipment lighting systems will cause lamps to:

a. illuminate normally
b. illuminate dimly
c. illuminate brighter than normal
d. burn out

Answer 3

b. illuminate dimly

Question 4

The electrical resistance values of all the components in the _________ electrical circuit add together to form the total resistance value of the circuit.

Answer 4

The electrical resistance values of all the components in the series electrical circuit add together to form the total resistance value of the circuit.

Question 5

________ or ______ warning devices signal the operator of a potential problem or hazardous condition concerning various machine operating conditions.

Answer 5

Audible or visual devices signal the operator of a potential problem or hazardous condition concerning various machine operating conditions.

Question 6

An information _______ allows the unit’s electronic control modules to communicate with each other.

Answer 6

An information data bus allows the unit’s electronic control modules to communicate with each other.

Question 7

List the five components every machine’s electrical circuit must contain to be safe and functional.

Answer 7

a. voltage source
b. electrical conductors
c. control device
d. over current protection device
e. load to be safe and functional

Question 8

When you are troubleshooting a malfunctioning lighting circuit, you will use a process of eliminating components that are not causing a problem in order to find the circuit component that is causing the problem. The process is called:

a. calculating a electrical failure
b. picking the electrical failure
c. illuminating the electrical failure
d. isolating the electrical failure

Answer 8

d. isolating the electrical failure

Question 9

Manufacturers develop and publish ________ to guide you through troubleshooting procedures.

Answer 9

Manufacturers develop and publish flow charts to guide you through troubleshooting procedures.

Question 10

The current draw across each leg of a _______ electrical circuit add together to form the total current draw for the entire circuit.

Answer 10

The current draw across each leg of a parallel electrical circuit add together to form the total current draw for the entire circuit.