MECHANIC MOTOR VEHICLE THEORY SENESTER - III

MECHANIC MOTOR VEHICLE THEORY SENESTER - III

A mechanism which enables to transfer the rotary motion of one shaft to another shaft at  the same axis is called —
a) Crank
b) Differential
c) Clutch
d) Fly wheel

The main advantage of a good clutch is ...........
a) Good power transmission
b) Rapid engagement
c) Rapid disengagement
d) Large size

The cushioning springs in clutch plate are used to reduce
a) Vibrations
b) Jerks
c) Vehicle speed
d) None of these

The clutch disc is positioned between the flywheel and the
a) Engine
b) Crankshaft
c) Pressure plate
d) Differential

The diaphragm clutch is generally used in
a) Modem cars
b) Dual mass flywheel
c) Tractors
d) Automatic transmission

"Clutch slippage" when the clutch is engaged is particularly noticeable
a) At low speed
b) At Idling
c) During acceleration
d) While starting the engine

Most of the vehicles having automatic transmission, connect the engine to the   gearbox through
a) Multi-plate clutch
b) Dog clutch
c) Magnetic clutch
d) Fluid clutch (fluid coupling or torque converter)

The synchronizer hub is attached with main shaft through
a) Synchronizer key
b) Shift fork
c) Synchronizer ring
d) Splines inside the hub

Jfthe tractive effort is the highest för a given velocity, then vehicle must be in —
a) Top gear
b) Third gear
c) Second gear
d) First, gear

The component in the torque converter which allows multiplication of the torque is -
a) Pump
b) Stator
c) Turbine
d) Impeller

The main disadvantage of sliding mesh transmission is
a) High noise level
b) Low mechanical efficiency
c) High skilled required by the driver
d) All of these

The purpose of synchromesh mechanism is to —
a) Run the driving and driven gear shafts at different speed
b) Synchronize the speed of driving and driven gear shafts
c) Increase the torque
d) Decrease the torque

In simple planetary gear, the member which increases the torque is —
a) Ring — gear
b) SurEgear
c) Planet carrier
d) None of these

In a torque converter, the maximum torque multiplication occurs at —
a) Stop b) Low speed
c) Medium speed d) High speed
15. The functions of Electronically controlled automatic transmissions is to
a) Downshift automatically when going downhill to control speed
b) Up shift automatically when braking on a slippery surface
c) Prevent the up shift when taking a turn
d) All of the above
16. In Hydraulic fluid controlled automatic transmission, the shifting of gears is based on

a) Governor and throttle pressure b) Only governor pressure
c) Only throttle pressure d) None of these
17. The probable cause for gear jumps out of ruesh is-
a) Weak spring or fork rod
b) Flywheel housing and gearbox out of alignment
c) Worn out teeth of sleeve or gears
d) Any of the above
18. Interlocking mechanism is provided in the shift mechanism of manual transmission is to-
a) Prevent shifting of two gears simultaneously
  b) Prevent shifting of reverse gear
c) Facilitatethe gear selection
  d) All of the above
19. In a simple gear train if number of idle gear is even then the direction of motion of driven  gear will bee
a) Same as driving gear
  b) Opposite to the driving gear
 c) Depending on number of teeth on the driving gear
d) Depending on number of teeth on the driven gear
Contd...3/
-3.
20. The smaller gears inside the differential casing are-
a) Pinion gears b) Sun gears

c) Ring gears d) None of these
21. The type of rear axle used in trucks is-
a) Semi floating b) Fully floating
c) Three quarter floating d) None of these
22. The limited slip differential (LSD) mechanism comes in action when-
 a) Driving on bumpy roads
 b) One tyre encounters a slippery section of road
 c) When cornering at high speed
d) All of the above
23. In most of the modern cars which type of drive is employed on the wheels-
a) Front 2 — wheel drive b) Rear 2 — wheel drive
c) 4 — wheel drive d) All wheel drive
24. Most popular manual steering gear for cars is-
a) Worm and wheel type b) Worm and nut type
c) Rack and Pinion type d) Re circulating ball type
 25. One purpose of re-circulating ball type steering gear is to reduce-
a) Toe out during turn b) Operating friction
c) Operating cost d) None of these
26. The power steering pump is-

a) Belt driven by camshaft b) Chain driven by crank shaft
c) Chain driven by cam shaft d) Belt driven by crank shaft
27. The purpose of caster is to-
  a) Ensure steering stability
b) Reduce the rolling resistance which the tyres may encounter during a turn
c) Enables the vehicle to be towed easily

d) Cancel the tendency of toe-out
28. The electronic power steering (EPS) system control unit controls the assist motor based on signals of-
a) Road resistance, steering turning speed and vehicle speed
b) Road resistance, steering turning direction and engine speed
c) Road resistance, steering turning direction and vehicle speed
d) Road resistance, steering turning speed and engine speed
29. The effect of excessive camber is-
a) High steering alignment torque b) Hard steering
c) Too much traction d) Un even tyre wear
30. The function which allows the driver to raise or lower the steering wheel is-
a) Power steering system
b) Tilt steering system
c) Air bag system
d) Rack and pinion type steering system
Contd.. .4/-


 -4-
31. Which of the following can be adjusted by modifying the tie — rod attachment length?
a) Camber b) Caster
 c) Toe-in or Toe-out d) Steering gear ratio
32. The name of component that connects the rack to the steering knuckles is-
a) Tie rod b) Sector arm
c) Pivot d) Spline
33. The vehicle ride will be comfortable if-
a) Un-sprung weight is kept minimum
  b) Un-sprung weight is kept maximum
c) Sprung weight is kept minimum
d) Vehicle weight is kept minimum
 34. The spring commonly used in modern cars is-
a) Semi elliptical leaf spring
b) Coil spring
c) Quarter elliptical leaf spring

 d) Elliptical leaf spring
35. The part which permits variation in the distance between the spring eyes of a leaf spring as the spring flexes, is called-
a) U — bolt b) Shackle
c) Leaf d) Bush
36. In which type of suspension the compressed air is necessary-
a) Rigid axle suspension b) Air suspension
c) Mc-Persion strut suspension d) Double wishbone suspension
37. A damper is also known as-
a) Torsion bar b) Spring
c) Stabilizer d) Shock absorber
38. An under — inflated tyre wear out more-
a) Near centre b) Near edge
c) In cross section d) In lateral direction

39. The part of the tyre which contacts the road surface is called-
a) Carcass b) Bead
 c) Tread d) Ply
40. The term "ply rating" with reference to a tyre refers to the-
  a) Actual number of plies b) Recommended inflation pressure
c) Aspect ratio d) Rated strength
41. The efficiency of mechanical brakes is usually-
a) 30-40% b) 40-50%
c) 50-60 0/0 d) 60-70%

Contd. ..5/-

'Brake Fade' is-
  a) Loss of pedal free play

b) Loss of hydraulic fluid
 c) Loss of co-efficient of friction
d) Change of colour of the lining due to oil soaked by lining
 43. The brake bleeding process removes from the hydraulic brake system.
a) Air b) Vacuum
c) Excess fluid d) Excess pressure
44. The role of Antilock Brake System (ABS) is that-
a) It reduces the vehicle's stopping distances

b) It minimizes brake fade
c) It maintains directional control during braking by preventing the wheels from locking

d) It prevents nose during braking and thereby postpones locking of the wheels
45. When the hydraulic brake pedal is pressed by the driver and feels 'spongy' it indicates   that-

a) Brake shoe clearance is excessive b) System contains air
c) System is in good condition d) Brake fluid require change
 46. Which of the following problem is caused due to wheel imbalance?
 a) Steering wheel vibration b) Poor acceleration
c) Reduced fuel efficiency d) Road noise

47. 'lhe purpose oftyre rotation on automobile is to-

a) Avoid ply separation b) Equalize wear

c) Get better ride d) None of these
48. If driving incense for a privately driven vehicle is expired then you can get your license   renewed for a maximum period of-
a) 3 years from the date of expiry b) 4 year from the date of expiry
c) 5 years from the date of expiry d) 6 years from the date of expiry
49. For a new petrol run private vehicle, the initial fitness certificate is valid for-
a) 20 years b) 15 years
c) 10 years d) 05 years
50. The violation ofwhich road•signs is a legal
 a) Mandatory sign b) Cautionary signs

c) Informatory signs d) Any of these

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