DSL-206 Chap 17: Heavy Duty Starting Systems and Circuits

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