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WorksheetsStarter Motor Week 1 Day 1
Total questions: 20
Worksheet time: 10mins
Using a small-diameter pinion gear, the starter motor rotates the engine through a _________ attached to the flywheel.
Ring gear
Solenoid
Relay
Crankshaft
During the cranking process, the pinion of the starter motor engages with the ___________.
Accessory drive system
Crankshaft
Flywheel ring gear
Engine
Technician A says that the ratio between the flywheel ring gear and pinion gear is anywhere between 10:1 and 15:1 in gasoline engines. Technician B says that the higher cranking torque required for diesel engines uses 15:1 to 22:1, with 18:1 being the most common. Who is correct?
Technician A
Technician B
Both Technician A and Technician B
Neither Technician A nor Technician B
What is the electric motor classification where the field and armature windings are connected in parallel?
Series
Compound
Stepper
Shunt
Which of the following statements is true about DC shunt or parallel wound motors?
These motors develop less torque but maintain a constant speed.
Field and armature windings have both series and parallel connections.
These motors have good starting torque and stable operating speed.
These motors are commonly used in wipers and power seats.
Which of the following statements is NOT true about DC series motors?
Field and armature windings are connected in series.
Series motors develop the highest torque.
Series motors are used as starting motors.
Armature coils are energized by microcontroller logic circuits.
In series motors, the current flows through the __________, and then to the __________, before leaving through the __________.
When battery voltage is low, the starter uses __________ amperage to rotate.
More
Less
Zero
The same
________ torque is produced at low speed because the motor draws the highest amperage.
Constant
Zero
Lowest
Greatest
What are the three main components, typically, of an armature?
Shaft, brushes, and commutator
Shaft, windings, and commutator
Battery, switch, and controller
Brushes, pole shoe, and windings
Which of the following statements is incorrect about the one-way clutch in pinion gears?
It operates like a ratchet to protect the starter motor.
It drives when turned in one direction.
It slips when turned in the opposite direction.
It shifts gears in electronically controlled transmissions.
Motor effect can be defined as:
The starter motor causing the engine flywheel and crankshaft to rotate from a resting position
The force of magnetic repulsion and attraction used to rotate an armature
The starter motor rotating the engine through a ring gear attached to the flywheel
The motor armature directly engaging the flywheel through a pinion gear
How much current do the starter solenoids consume?
20 amps to 30 amps
30 amps to 60 amps
50 amps to 80 amps
70 amps to 90 amps
Technician A says that starter relays are a type of continuous-duty relay. Technician B says that starter relays are intended for continuous operation. Who is correct?
Technician A
Technician B
Both Technician A and Technician B
Neither Technician A nor Technician B
The overcrank protection thermostat switch in starter motors is sensitive to ________.
A high initial current
The speed the armature rotation
The force of magnetic repulsion
The temperature of the motor
If the starting system complaint is slow cranking, the ________ test is recommended.
Growler
On-vehicle
Available voltage
Off-vehicle
In a solenoid voltage drop test, the voltage drop should be less than ________ volt for a 12-volt system.
0.8
0.9
0.7
0.5
The _________ is a quick way to determine if the relay is operational.
Starter relay bypass test
Available voltage test
Starter current draw test
Starter circuit voltage drop test
Technician A says a left hand rotation engine rotates clockwise. Technician B says a right hand rotation engine rotates counter-clockwise. Who is correct?
Technician A
Technician B
Both Technician A and Technician B
Neither Technician A nor Technician B
Which of the following is NOT correct concerning overhauling a starter motor?
Use a 24-volt test lamp to test field windings.
The starter motor component parts should also be cleaned and replaced or repaired and lubricated as necessary.
Check drive clutch for slippage.
Perform a full load test.
