190302 e

Question 1

The type of wire connection made by twisting two wires together is called?

Answer 1

A western union splice

Question 2

T/F when using a DMM it is okay to pierce the insulation of the wiring

Answer 2

False

Question 3

When repairing wires with non-insulated butt connectors, what should be done after the connection is crimped?

Answer 3

Once crimped, solder the splice and insulate it with shrink tubing

Question 4

The most common fault that causes electrical circuit malfunction is?

Answer 4

The open fault

Question 5

The troubleshooting process of finding specifically where the fault is located is called?

Answer 5

Isolating the electrical fault

Question 6

What are the four steps to voltage drop testing?

Answer 6

Step one check source voltage

Step two check voltage drop across the load

Step three check voltage drop from positive side of the load to positive battery

Step four check negative side of the load to ground

Question 7

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

Answer 7

normal position.

Question 8

List the five (5) components every machine’s electrical circuit must contain to be safe
and functional.

Answer 8

Every machine’s electrical circuit must have:

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

Question 9

Ohm’s 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 (Ω) What is the correct mathematical expression for Ohm’s Law?
a) E = I x R
b) I = E/R
c) R = E/I

Answer 9

all of the above

Question 10

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

Answer 10

isolating the electrical failure.

Question 11

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

Answer 11

illuminate dimly.

Question 12

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

Answer 12

flow charts

Question 13

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

Answer 13

series

Question 14

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

Answer 14

paralle

Question 15

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

Answer 15

Audible or visual

Question 16

Any change in unit electrical system voltage will affect the bi-metal gauge readings
and cause them to be inaccurate. A small ______ _____ is used to maintain the system voltage and provide accurate gauge readings

Answer 16

voltage regulator

Question 17

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

Answer 17

data bus