DSL-206 Electrical 2 Mid-term

Using a small-diameter pinion gear, the starter motor rotates the engine through a __________ attached to the flywheel

• a. Ring gear

• b. Relay

• c. Solenoid

• d. Crankshaft

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

Which of the following is NOT correct concerning overhauling a starter motor?

• a. Use a 24-volt test lamp to test field windings.

• b. The starter motor component parts should also be cleaned and replaced or repaired and lubricated as necessary.

• c. Check drive clutch for slippage

• d. Perform a full load test.

What is the electric motor classification where the field and armature windings are connected in parallel?

• a. Series

• b. Compound

• c. Stepper

• d. Shunt

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