WorksheetsPM Midterm 2022-2023
Total questions: 51
Worksheet time: 26mins
Name
Class
Date
1.
Name
4 lines
2.
Electricity is the flow of protons from one atom to another.
a)
True
b)
False
3.
The chemical reaction in a battery causes a lack of electrons at the positive (+) terminal.
a)
True
b)
False
4.
One watt is equal to one volt multiplied by one ampere.
a)
True
b)
False
5.
A series circuit provides two or more different paths for the current to flow through.
a)
True
b)
False
6.
To complete the electrical path to the vehicle’s battery, the vehicle’s metal frame components are often part of the electrical circuit.
a)
True
b)
False
7.
What is the name of the formula E = I x R?
a)
Ampere’s law
b)
Ohm’s law
c)
Watt’s law
8.
What is the current in a 12-volt circuit with a 6-ohm resistor connected series?
a)
2 amps
b)
4 amps
c)
6 amps
9.
Which type of resistor is commonly used in automotive circuits?
a)
fixed value
b)
stepped
c)
variable
d)
All the answers are correct
10.
The unit for measuring electrical current is _____.
a)
amperes
b)
ohms
c)
volts
11.
The unit for measuring electrical resistance is _____.
a)
amperes
b)
ohms
c)
volts
12.
The unit for measuring electrical pressure (force) is _____.
a)
amperes
b)
ohms
c)
volts
13.
Which of the following is a source of energy in an automobile’s electrical system?
a)
battery
b)
AC generator
c)
Both answers are correct.
14.
The black DMM test lead always plugs into the COM input jack.
a)
True
b)
False
15.
High resistance in a circuit causes decreased current flow.
a)
True
b)
False
16.
A circuit is open when it is complete.
a)
True
b)
False
17.
When a circuit protection device (fuse, circuit breaker) opens due to higher than normal current, a short is the likely cause.
a)
True
b)
False
18.
A voltage drop test can find excessive resistance in a circuit that may not be detected using an ohmmeter.
a)
True
b)
False
19.
The wave form of constant DC voltage on a lab scope is a _____.
a)
square wave
b)
sine wave
c)
flat line
20.
When testing resistance in a circuit with an ohmmeter, _____.
a)
the ohmmeter is connected in parallel to the circuit and the circuit is turned on
b)
the ohmmeter is connected in series to the circuit and the circuit is turned on
c)
the circuit or component must first be disconnected from the power source, then the ohmmeter is connected in parallel with the component being tested parallel with the component being tested
21.
When connecting a conventional ammeter to a circuit, _____.
a)
the circuit must turned on
b)
the ammeter must be wired in series with the circuit
c)
the anticipated load current must be less than the ammeter’s maximum current rating
d)
all answers are correct.
22.
DMMs that can measure temperature use a _____ adapter that is placed on or near the object to be checked.
a)
thermometer
b)
thermocouple
c)
refractometer
23.
The best method for testing wires and electrical connections is a(n) _____.
a)
ohmmeter test
b)
voltage drop test
c)
inductive ammeter
24.
Which piece of information about the vehicle’s wiring cannot be found in the electrical schematics?
a)
wire color
b)
wire size
c)
component location on vehicle
25.
A potentiometer [type of variable resistor] can be tested with all the following tools EXCEPT:
a)
test light
b)
voltmeter
c)
digital lab scope (DSO)
26.
A battery is an electrochemical device that converts chemical energy into electrical energy.
a)
True
b)
False
27.
At 0 degrees Fahrenheit, a battery can produce only 40 percent of the electric current that it is capable of producing at 80 degrees Fahrenheit.
a)
True
b)
False
28.
Battery hold-downs reduce the amount of vibration and help increase the life of the battery.
a)
True
b)
False
29.
. The typical CCA rating for a passenger car or light truck is between 300 and 600 amps.
a)
True
b)
False
30.
Vehicles equipped for cold climates may have a battery blanket or heater to keep the battery warm during extremely cold weather
a)
True
b)
False
31.
Which of the following is NOT a common cause for premature battery failure?
a)
increased cycling
b)
excessive engine restarting
c)
overcharging
32.
How many volts are present in a fully charged 12-volt battery?
a)
12
b)
12.1
c)
12.6
33.
When load testing a battery, the load applied to the battery should be _____.
a)
one half the CCA rating
b)
the CCA rating
c)
two times the CCA rating
34.
What is the first step when removing an old battery?
a)
Disconnect the positive cable
b)
Remove the battery hold-down straps and cover
c)
Disconnect the negative terminal
35.
While conducting a battery drain test, if the ammeter reads _____ or more amperes, there is excessive drain.
a)
0.100
b)
0.050
c)
2.500
36.
A conductance tester measures the battery condition by _____.
a)
sending a small AC signal through the battery and measuring the current response
b)
measuring how fast the voltage drops when a 100 amp load is applied
c)
measuring the voltage drop between cells as a load is applied
37.
The best way to test battery cables and terminal for excessive resistance is by _____ testing.
a)
ohmmeter
b)
voltage drop
c)
inductive ammeter
38.
All the following are good safety precautions to follow when charging batteries EXCEPT:
a)
Always wear safety glasses
b)
Make sure the area is well ventilated
c)
Never allow the charging voltage to exceed 12.6 volts
39.
When charging a battery that has been completely discharged, the most important item to monitor is _____.
a)
gassing
b)
charging voltage
c)
battery temperature
40.
Technician A says jump-starting a battery can damage electronic components. Technician B says a dead battery should be jump-started instead of recharged. Who is correct?
a)
tech a
b)
tech b
c)
both
d)
neither
41.
The starter motor converts electric current into torque or twisting force through the interaction of magnetic fields.
a)
True
b)
False
42.
A battery should be checked and charged as needed before performing any starting systems tests.
a)
True
b)
False
43.
The starter motor converts electric current into torque or twisting force through the interaction of magnetic fields.
a)
True
b)
False
44.
Which of the following could result in a hard starting condition?
a)
corroded battery cables
b)
excessive CCA capacity
c)
heavy-gauge battery cables
45.
The usual minimum cranking voltage specification is ______ volts.
a)
9.6
b)
12.1
c)
8.7
46.
The device that prevents the engine from turning the armature of the starter motor is the ______.
a)
overrunning clutch
b)
pinion gear
c)
flywheel
47.
If a ground circuit test reveals a voltage drop of more than 0.2 volt, the problem may be a ______.
a)
loose starter motor mounting bolt
b)
poor battery ground terminal post connector
c)
damaged battery ground cable
d)
All the answers are correct
48.
An engine cranks slowly. Technician A says a possible cause of the problem is low resistance in the starter circuit connections. Technician B says a possible cause is an open in the starter field coil circuit. Who is correct?
a)
tech a
b)
tech b
c)
both
d)
neither
49.
The starter solenoid’s function is to _____.
a)
push the drive pinion gear into engagement with the ring gear teeth
b)
act as a relay switch to energize the starter motor
c)
both answers are correct.
50.
What device pushes the starter pinion gear into mesh with the ring gear when the ignition switch is in the start
a)
overrunning clutch
b)
solenoid
c)
armature
51.
The two main components of the armature are the armature windings and the _____.
a)
field coil
b)
brush holder
c)
commutator
100 %
