WorksheetsDSL-206 Chap 17: Heavy Duty Starting Systems and Circuits
Total questions: 15
Worksheet time: 8mins
Using a small-diameter pinion gear, the starter motor rotates the engine through a __________ attached to the flywheel.
a. Ring gear
b. Solenoid
c. Relay
d. Crankshaft
During the cranking process, the pinion of the starter motor engages with the __________.
a. Accessory drive system
b. Crankshaft
c. Flywheel ring gear
d. 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?
a. Technician A
b. Technician B
c. Both Technician A and Technician B
d. Neither Technician A nor Technician B
What is the electric motor classification where the field and armature windings are connected in parallel?
a. Series
b. Compound
c. Stepper
d. Shunt
Which of the following statements is true about DC shunt or parallel wound motors?
a. These motors develop less torque but maintain a constant speed.
b. Field and armature windings have both series and parallel connections.
c. These motors have good starting torque and stable operating speed.
d. These motors are commonly used in wipers and power seats.
Which of the following statements is NOT true about DC series motors?
a. Field and armature windings are connected in series
b. Series motors develop the highest torque.
c. Series motors are used as starting motors.
d. Armature coils are energized by microcontroller logic circuits.
In series motors, the current flows through the __________, and then to the __________, before leaving through the __________.
a. Negative chassis, brush, armature windings
b. Armature windings, field windings, motor terminal
c. Field coils, armature windings, positive battery
d. Field windings, armature windings, motor terminal
When battery voltage is low, the starter uses __________ amperage to rotate.
a. More
b. Less
c. Zero
d. The same
__________ torque is produced at low speed because the motor draws the highest amperage.
a. Constant
b. Zero
c. Lowest
d. Greatest
What are the three main components, typically, of an armature?
a. Shaft, brushes, and commutator
b. Shaft, windings, and commutator
c. Battery, switch, and controller
d. Brushes, pole shoe, and windings
Which of the following statements is incorrect about the one-way clutch in pinion gears?
a. It operates like a ratchet to protect the starter motor
b. It drives when turned in one direction
c. It slips when turned in the opposite direction.
d. It shifts gears in electronically controlled transmissions.
Motor effect can be defined as:
a. The starter motor causing the engine flywheel and crankshaft to rotate from a resting position
b. The force of magnetic repulsion and attraction used to rotate an armature
c. The starter motor rotating the engine through a ring gear attached to the flywheel
d. The motor armature directly engaging the flywheel through a pinion gear
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?
a. Technician A
b. Technician B
c. Both Technician A and Technician B
d. Neither Technician A nor Technician B
How much current does starter solenoids consume?
a. 20 amps to 30 amps
b. 30 amps to 60 amps
c. 50 amps to 80 amps
d. 70 amps to 90 amps
The overcrank protection thermostat switch in starter motors is sensitive to __________.
a. A high initial current
b. The speed the armature rotation
c. The force of magnetic repulsion
d. The temperature of the motor
