Automotive Engine Auxiliary Systems Multiple Choice Questions on “ Starting System – Bendix Drives”.
1. Which are the two types of Bendix drives?
a) Inboard and outboard
b) Inboard and onboard
c) Onboard and outboard
d) Onboard and bottom board
Answer: a
Clarification: Inboard and outboard are the two types of Bendix drives. In the outboard type pinion moves away from the starting motor to engage the flywheel whereas in the inboard type it moves towards the starting motor.
2. In outboard type, the pinion moves which side to the starting motor?
a) Up
b) Towards
c) Away
d) Downward
Answer: c
Clarification: Inboard and outboard are the two types of Bendix drives. In the outboard type pinion moves away from the starting motor to engage the flywheel whereas in the inboard type it moves towards the starting motor.
3. In inboard type, the pinion moves which side to the starting motor?
a) Up
b) Towards
c) Away
d) Downward
Answer: b
Clarification: Inboard and outboard are the two types of Bendix drives. In the outboard type pinion moves away from the starting motor to engage the flywheel whereas in the inboard type it moves towards the starting motor.
4. The sleeve can slide or turn freely over which part of the motor?
a) Shaft
b) Body
c) Commuter
d) Armature
Answer: a
Clarification: The sleeve can slide or turn freely over the shaft of the motor and the shaft is keyed to the fixed down head which is connected torsionally to the sleeve through a coil spring.
5. The lock pin comes out of the detent due to which force?
a) Normal force
b) Centripetal force
c) Shear force
d) Centrifugal force
Answer: d
Clarification: The lock pin comes out of the detent due to centrifugal force which overcomes the spring force. The pinion then gets disengaged as in the case of the standard Bendix drives.
6. Which pin is loaded with a spring which is stiffer than the spring of lock-pin?
a) Race pin
b) Anti-drift pin
c) Circlip pin
d) Roll pin
Answer: b
Clarification: The Anti-drift pin is loaded with a spring that is stiffer than the spring of lock-pin. This prevents the drifting of the pinion to engage with the flywheel.
7. When the motor is started, the sleeve starts rotating along with which part of the motor?
a) Windings
b) Armature shaft
c) Poles and brushes
d) Commuter
Answer: b
Clarification: When the motor is started, the sleeve starts rotating along with the armature shaft of the motor. A spring under compression is employed in between the sleeve and the nut which is fixed on the end of the armature shaft.
8. When pinion gear starts to rotate, which part offers initial resistance?
a) Flywheel
b) Crankshaft
c) Connecting rod
d) Springs
Answer: a
Clarification: When the pinion gear starts to rotate, it is offered by an internal resistance by the flywheel which is stationary when the vehicle is in a standstill position.
9. Which type of Bendix drive is used to avoid the damage caused due to a false engine starting?
a) Overrunning clutch
b) Rubber spring
c) Compression type
d) Folo-thru
Answer: b
Clarification: Rubber spring Bendix drive is used to avoid the damage caused due to false engine starting the piston gets disengaged and an attempt is made to bring it back.
10. Dyer Bendix drive is used in which type of vehicle?
a) Cars
b) Bikes
c) Heavy-duty vehicle
d) Light-duty vehicle
Answer: c
Clarification: Dyer Bendix drive is used in the Heavy-duty type of vehicle, it is designed to complete engagement of the pinion with the flywheel gear.
11. In Dyer Bendix drive, the spiral teeth have which type of motion?
a) Linear motion
b) Colinear motion
c) Angular motion
d) Perpendicular motion
Answer: c
Clarification: When the shift sleeve is pushed to the right and consequently the pinion is also moved in that direction, because of the spiral teeth, there is angular motion.
12. The shell is connected with the armature shaft through splines and the collar is attached to which part?
a) Collar
b) Key
c) Pinion
d) Spigot
Answer: c
Clarification: The shell is connected with the armature shaft through splines and the collar is attached to Pinion of the starting motor to start the vehicles.
13. Lubrication causes the dirt to accumulate on the sleeve and which part?
a) Spigot
b) Collar
c) Pinion
d) Key
Answer: c
Clarification: Lubrication causes the dirt to accumulate on the sleeve and pinion teeth which cause sticking of pinion and inertia drives are that the pinion and the sleeve should not be lubricated.