MOTOR VEHICLE MECHANIC-PAGE 1
MOTOR VEHICLE MECHANIC- PAGE 1 MCQs
1. The angle between the central plane of tyre and the direction of motion is known as :
(A) Tracking (B) Turning radius (C) Slip angle (D) Toe – out
Ans: C
2. The firing order for an in -line 4 cylinder IC engine is :
(A) 1 - 3 - 2- 4 (B) 1 - 2 - 3 - 4 (C) 1 - 3 - 4 - 2 (D) 1 - 2 - 4 – 3
Ans: C
3. The brake drum is made of :
(A) Aluminium alloy (B) Spring steel
(C) High carbon steel (D) Cast iron
Ans: D
4. The vibrations of single dry plate clutch are absorbed by :
(A) Pressure plate (B) Centre hub (C) Clutch Linkage (D) Torsional spring
Ans: D
5. The trouble of an engine misfiring is likely to result from :
(A) Incorrect air fuel mixture (B) Air lock in the fuel lines
(C) Damage of ignition coil winding (D) Spark plug gap is too wide
Ans: D
6. The relationship between resistance, current, and voltage can be expressed in the form of an equation known as :
(A) Charle’s Law (B) Faraday’s Law (C) Flemming’s Law (D) Ohm’s Law
Ans: D
7. Most of the multi speed gear boxes contains :
(A) 3 shaft (B) 4 shaft (C) 2 shaft (D) 5 shaft
Ans: B
8. Brake fluid is a mixture of :
(A) Grease and diesel (B) Petrol and grease
(C) Petroleum oil and grease (D) Glycerine and alcohol
Ans: D
9. The fluid generally used in shock absorber is a mixture of :
(A) 40% SAE 40 oil and 60% transformer oil
(B) 40% SAE 90 oil and 60% turbine oil
(C) 60% transformer oil and 40% turbine oil
(D) 60% turbine oil and 40% transformer oil
Ans: C
10. The calorific value of diesel fuel is about :
(A) 30.5 mJ/kg (B) 50 mJ/kg (C) 45 mJ/kg (D) 42.5 mJ/kg
Ans: D
11. The air gap between the central electrode and ground electrode of a spark plug is around :
(A) 0.3 mm (B) 0.02 mm (C) 1.2 mm (D) 1 mm
Ans: D
12. The total piston displacement of all the engine cylinder is called :
(A) Compression ratio (B) Engine torque
(C) Engine capacity (D) Engine cycle
Ans: C
13. In petrol engine the compression ratio varies from :
(A) 5 : 1 to 7 : 1 (B) 9 : 1 to 11 : 1 (C) 6 : 1 to 8 : 1 (D) 6 : 1 to 9 : 1
Ans: D
14. The thermostat valve which is opened automatically by means of :
(A) High temperature whenever engine desires cooling
(B) Low temperature
(C) Water pressure
(D) Automatic switch
Ans: A
15. The dilution of lubricating oil is caused by :
(A) Worn off particles (B) Water
(C) Solid contaminants (D) Fuels
Ans: D
16. The brake lines in hydraulic brake system are made of :
(A) Plastic (B) Rubber (C) Aluminium (D) Steel
Ans: D
17. __________ brings back shoes in their original position when the brakes are not applied.
(A) Compression spring (B) Retracting spring
(C) Pressure spring (D) Torsion spring
Ans: B
18. The frictional horse power of a well adjusted petrol engine should be nearly :
(A) 20% (B) 50% (C) 15% (D) 10%
Ans: D
19. The automobile body should be sufficiently rigid so as to resist twisting on bad roads, is known as :
(A) Air drag (B) Lightness
(C) Stiffness (D) Torsional stiffness
Ans: D
20. __________ types of gear boxes are generally used in motor cycles.
(A) Synchronising gear boxes (B) Constant mesh
(C) Epicyclic (D) Progressive type
Ans: D
(A) Tracking (B) Turning radius (C) Slip angle (D) Toe – out
Ans: C
2. The firing order for an in -line 4 cylinder IC engine is :
(A) 1 - 3 - 2- 4 (B) 1 - 2 - 3 - 4 (C) 1 - 3 - 4 - 2 (D) 1 - 2 - 4 – 3
Ans: C
3. The brake drum is made of :
(A) Aluminium alloy (B) Spring steel
(C) High carbon steel (D) Cast iron
Ans: D
4. The vibrations of single dry plate clutch are absorbed by :
(A) Pressure plate (B) Centre hub (C) Clutch Linkage (D) Torsional spring
Ans: D
5. The trouble of an engine misfiring is likely to result from :
(A) Incorrect air fuel mixture (B) Air lock in the fuel lines
(C) Damage of ignition coil winding (D) Spark plug gap is too wide
Ans: D
6. The relationship between resistance, current, and voltage can be expressed in the form of an equation known as :
(A) Charle’s Law (B) Faraday’s Law (C) Flemming’s Law (D) Ohm’s Law
Ans: D
7. Most of the multi speed gear boxes contains :
(A) 3 shaft (B) 4 shaft (C) 2 shaft (D) 5 shaft
Ans: B
8. Brake fluid is a mixture of :
(A) Grease and diesel (B) Petrol and grease
(C) Petroleum oil and grease (D) Glycerine and alcohol
Ans: D
9. The fluid generally used in shock absorber is a mixture of :
(A) 40% SAE 40 oil and 60% transformer oil
(B) 40% SAE 90 oil and 60% turbine oil
(C) 60% transformer oil and 40% turbine oil
(D) 60% turbine oil and 40% transformer oil
Ans: C
10. The calorific value of diesel fuel is about :
(A) 30.5 mJ/kg (B) 50 mJ/kg (C) 45 mJ/kg (D) 42.5 mJ/kg
Ans: D
11. The air gap between the central electrode and ground electrode of a spark plug is around :
(A) 0.3 mm (B) 0.02 mm (C) 1.2 mm (D) 1 mm
Ans: D
12. The total piston displacement of all the engine cylinder is called :
(A) Compression ratio (B) Engine torque
(C) Engine capacity (D) Engine cycle
Ans: C
13. In petrol engine the compression ratio varies from :
(A) 5 : 1 to 7 : 1 (B) 9 : 1 to 11 : 1 (C) 6 : 1 to 8 : 1 (D) 6 : 1 to 9 : 1
Ans: D
14. The thermostat valve which is opened automatically by means of :
(A) High temperature whenever engine desires cooling
(B) Low temperature
(C) Water pressure
(D) Automatic switch
Ans: A
15. The dilution of lubricating oil is caused by :
(A) Worn off particles (B) Water
(C) Solid contaminants (D) Fuels
Ans: D
16. The brake lines in hydraulic brake system are made of :
(A) Plastic (B) Rubber (C) Aluminium (D) Steel
Ans: D
17. __________ brings back shoes in their original position when the brakes are not applied.
(A) Compression spring (B) Retracting spring
(C) Pressure spring (D) Torsion spring
Ans: B
18. The frictional horse power of a well adjusted petrol engine should be nearly :
(A) 20% (B) 50% (C) 15% (D) 10%
Ans: D
19. The automobile body should be sufficiently rigid so as to resist twisting on bad roads, is known as :
(A) Air drag (B) Lightness
(C) Stiffness (D) Torsional stiffness
Ans: D
20. __________ types of gear boxes are generally used in motor cycles.
(A) Synchronising gear boxes (B) Constant mesh
(C) Epicyclic (D) Progressive type
Ans: D
21. The heart of the ignition system circuit and component is :
(A) Condenser (B) Ignition coil (C) Generator (D) Distributor
Ans: B
22. When the clutch is disengaged position as a result :
(A) The power is transmitted (B) The power is not transmitted
(C) The power is in neutral position (D) None of the above
Ans: B
23. Most of the gear box casings are made of :
(A) High carbon steel (B) Mild steel
(C) Chromium steel (D) Aluminium alloy
Ans: D
24. The brake fluid has the characteristics like :
(A) Velocity and pressure (B) Velocity and speed
(C) Viscosity and boiling point (D) Velocity and boiling point
Ans: C
25. How many cells are used in 12 volt automobile battery ?
(A) 3 (B) 4 (C) 8 (D) 6
Ans: D
26. If the air fuel mixture ignites before the spark takes place at spark plug is called :
(A) Penetration (B) Detonation (C) Oxidization (D) Pre-ignition
Ans: D
27. What is the reason behind using aluminium alloy to make cylinder blocks ?
(A) Light in weight and has good heat dissipation
(B) Low in material cost
(C) Good look in colour
(D) Heavy weight and poor heat dissipation
Ans: A
28. The thermal efficiency of the 4 stroke engine is :
(A) Low (B) Medium (C) High (D) Normal
Ans: C
29. The inlet valve generally spins about 15 degree before TDC is called :
(A) Valve lag (B) Valve lead
(C) Valve twist (D) None of the above
Ans: B
30. If the engine coolent leaks into the engine oil as a result :
(A) Oil becomes thick oil (B) Turns into black colour
(C) Appears milky stage (D) None of the above
Ans: C
31. The operation of removing trapped air from the hydraulic brake system is known as :
(A) Exhausting (B) Trapping (C) Bleeding (D) Ventilation
Ans: C
32. When a vehicle is moving on straight level road and the resistance affecting both the driving wheels is the :
(A) Lower (B) Higher (C) Normal (D) Same
(B) Ans: D
33. Which of the following is not a part of differential gear box ?
(A) Star pinion (B) Axle shaft (C) Drive pinion (D) Crank shaft
Ans: D
34. The shape of reflector used for automobile head lamp is :
(A) Circle (B) Spherical (C) Parabolic (D) Elliptical
Ans: C
35. The leaf springs are generally made of :
(A) Cast steel (B) High carbon steel
(C) Cast iron (D) Spring steel
Ans: D
36. The backward tilt of the king pin and axle at the top is called :
(A) Camber angle (B) Toe - in
(C) King pin inclination (D) Caster angle
Ans: D
37. Piston displacement of an engine is :
(A) Volume of cylinder×Stroke×No. of cylinders
(B) Pressure of cylinder×No. of cylinder×Stroke
(C) Area of cylinder×Stroke×No. of cylinders
(D) Area of cylinder×Stroke volume×No. of cylinder
Ans: C
38. The clutch unit coil springs are located in between the pressure plate and the :
(A) Disc unit (B) Battle
(C) Fly wheel (D) Clutch cover
Ans: D
39. The wheel base of a auto car is :
(A) The distance between the rear tyres
(B) The distance between the front tyres
(C) Length of the vehicle
(D) The distance between the centre of the front and rear wheels
Ans: D
40. The capacity of a lead acid battery is usually expressed in :
(A) Ohms (B) Volt (C) Ampere - hours (D) Ampere
Ans: C
41. __________operates contact breaker points of ignition system.
(A) Generator (B) Starting motor (C) Regulator (D) Engine
Ans: D
42. When the clutch operates in an oil bath, it is called :
(A) Dry type clutch (B) Wet clutch
(C) Single plate clutch (D) Centrifugal clutch
Ans: B
43. __________ brings back brake shoes in their original position.
(A) Compression spring (B) Tension spring
(C) Refracting spring (D) Coil springs
Ans: C
44. The main advantage of coil spring is that it doesn’t make :
(A) Wear and tear (B) Braking tendency
(C) Noise problem (D) None of the above
Ans: C
45. The air fuel ratio of a rich mixture is about :
(A) 8 : 1 (B) 9 : 1 (C) 13 : 1 (D) 10 : 1
Ans: A
46. The acid used in lead acid battery is :
(A) Hydrofluoric acid (B) Nitric acid
(C) Hydrochloric acid (D) Sulphuric acid
Ans: D
47. __________ gear is used to check straightness, end play of shafts, run out of wheels and back lash of gears.
(A) Vaccum gauge (B) Pressure gauge
(C) Dual gauge (D) Feeler gauge
Ans: C
48. The volumetric efficiency of two stroke engine is :
(A) Medium (B) Normal (C) Less (D) High
Ans: C
49. The heavy lubricating oil has :
(A) Low viscosity (B) Normal viscosity
(C) High viscosity (D) None of the above
Ans: C
50. The firing order of 6 cylinder in-line engine is usually :
(A) 1 - 3 - 4 - 2 - 5 - 6 (B) 1 - 5 - 3 - 6 - 2 - 4
(C) 1 - 3 - 5 - 2 - 3 - 4 (D) 1 - 4 - 5 - 3 - 6 – 2
Ans: B
(A) Condenser (B) Ignition coil (C) Generator (D) Distributor
Ans: B
22. When the clutch is disengaged position as a result :
(A) The power is transmitted (B) The power is not transmitted
(C) The power is in neutral position (D) None of the above
Ans: B
23. Most of the gear box casings are made of :
(A) High carbon steel (B) Mild steel
(C) Chromium steel (D) Aluminium alloy
Ans: D
24. The brake fluid has the characteristics like :
(A) Velocity and pressure (B) Velocity and speed
(C) Viscosity and boiling point (D) Velocity and boiling point
Ans: C
25. How many cells are used in 12 volt automobile battery ?
(A) 3 (B) 4 (C) 8 (D) 6
Ans: D
26. If the air fuel mixture ignites before the spark takes place at spark plug is called :
(A) Penetration (B) Detonation (C) Oxidization (D) Pre-ignition
Ans: D
27. What is the reason behind using aluminium alloy to make cylinder blocks ?
(A) Light in weight and has good heat dissipation
(B) Low in material cost
(C) Good look in colour
(D) Heavy weight and poor heat dissipation
Ans: A
28. The thermal efficiency of the 4 stroke engine is :
(A) Low (B) Medium (C) High (D) Normal
Ans: C
29. The inlet valve generally spins about 15 degree before TDC is called :
(A) Valve lag (B) Valve lead
(C) Valve twist (D) None of the above
Ans: B
30. If the engine coolent leaks into the engine oil as a result :
(A) Oil becomes thick oil (B) Turns into black colour
(C) Appears milky stage (D) None of the above
Ans: C
31. The operation of removing trapped air from the hydraulic brake system is known as :
(A) Exhausting (B) Trapping (C) Bleeding (D) Ventilation
Ans: C
32. When a vehicle is moving on straight level road and the resistance affecting both the driving wheels is the :
(A) Lower (B) Higher (C) Normal (D) Same
(B) Ans: D
33. Which of the following is not a part of differential gear box ?
(A) Star pinion (B) Axle shaft (C) Drive pinion (D) Crank shaft
Ans: D
34. The shape of reflector used for automobile head lamp is :
(A) Circle (B) Spherical (C) Parabolic (D) Elliptical
Ans: C
35. The leaf springs are generally made of :
(A) Cast steel (B) High carbon steel
(C) Cast iron (D) Spring steel
Ans: D
36. The backward tilt of the king pin and axle at the top is called :
(A) Camber angle (B) Toe - in
(C) King pin inclination (D) Caster angle
Ans: D
37. Piston displacement of an engine is :
(A) Volume of cylinder×Stroke×No. of cylinders
(B) Pressure of cylinder×No. of cylinder×Stroke
(C) Area of cylinder×Stroke×No. of cylinders
(D) Area of cylinder×Stroke volume×No. of cylinder
Ans: C
38. The clutch unit coil springs are located in between the pressure plate and the :
(A) Disc unit (B) Battle
(C) Fly wheel (D) Clutch cover
Ans: D
39. The wheel base of a auto car is :
(A) The distance between the rear tyres
(B) The distance between the front tyres
(C) Length of the vehicle
(D) The distance between the centre of the front and rear wheels
Ans: D
40. The capacity of a lead acid battery is usually expressed in :
(A) Ohms (B) Volt (C) Ampere - hours (D) Ampere
Ans: C
41. __________operates contact breaker points of ignition system.
(A) Generator (B) Starting motor (C) Regulator (D) Engine
Ans: D
42. When the clutch operates in an oil bath, it is called :
(A) Dry type clutch (B) Wet clutch
(C) Single plate clutch (D) Centrifugal clutch
Ans: B
43. __________ brings back brake shoes in their original position.
(A) Compression spring (B) Tension spring
(C) Refracting spring (D) Coil springs
Ans: C
44. The main advantage of coil spring is that it doesn’t make :
(A) Wear and tear (B) Braking tendency
(C) Noise problem (D) None of the above
Ans: C
45. The air fuel ratio of a rich mixture is about :
(A) 8 : 1 (B) 9 : 1 (C) 13 : 1 (D) 10 : 1
Ans: A
46. The acid used in lead acid battery is :
(A) Hydrofluoric acid (B) Nitric acid
(C) Hydrochloric acid (D) Sulphuric acid
Ans: D
47. __________ gear is used to check straightness, end play of shafts, run out of wheels and back lash of gears.
(A) Vaccum gauge (B) Pressure gauge
(C) Dual gauge (D) Feeler gauge
Ans: C
48. The volumetric efficiency of two stroke engine is :
(A) Medium (B) Normal (C) Less (D) High
Ans: C
49. The heavy lubricating oil has :
(A) Low viscosity (B) Normal viscosity
(C) High viscosity (D) None of the above
Ans: C
50. The firing order of 6 cylinder in-line engine is usually :
(A) 1 - 3 - 4 - 2 - 5 - 6 (B) 1 - 5 - 3 - 6 - 2 - 4
(C) 1 - 3 - 5 - 2 - 3 - 4 (D) 1 - 4 - 5 - 3 - 6 – 2
Ans: B
51. The mixing of air and fuel in diesel engine occurs in :
(A) Carburettor (B) Fuel pump (C) Fuel injector (D) Engine cylinder
Ans: D
52. The CB point gap is measured by using :
(A) Micrometer (B) Caliper (C) Pitch gauge (D) Feeler gauge
Ans: D
53. The most effective air cleaner for diesel engine is :
(A) Wet type air cleaner (B) Dry type air cleaner
(C) Water bath air cleaner (D) Oil bath air cleaner
Ans: D
54. The most commonly used car heater is :
(A) Diesel type (B) Petrol type (C) Hot water type (D) Hot air type
Ans: C
55:-The fuel which detonate easily is
A:-n-Heptane B:-Iso-octane C:-Benzene D:-Alcohol
Ans: A
56:-The size of a lathe is specified by
A:-Maximum distance between the centres B:-Length of bed
C:-Height of the centre measured from lathe bed D:-All of the above
Ans: D
57:-Which of the following method is used for taper turning in a lathe?
A:-back gear method B:-all gear drive C:-form tool method D:-none of the above
Ans: C
58:-The cutting tool in a milling machine is held in position
A:-arbour
B:-spindle
C:-column
D:-knee
Ans: A
59:-Which of the following metal has the least weldability
A:-carbon steel B:-stainless steel C:-iron D:-cast iron
Ans: B
60:-Which of the following is an example of plastic welding?
A:-arc welding B:-gas welding C:-fusion welding D:-forge welding
Ans: D
61:-Seam welding is
A:-An arc welding process B:-Gas welding process C:-Continuous spot welding process D:-None
Ans: C
62:-In thermit welding, the aluminium and iron oxide are mixed in the proportion of
A:-1:3 B:-1:1 C:-1:2 D:-2:1
Ans: A
63:-The validity of registration of a private vehicle is
A:-1 year B:-2 years C:-life time D:-15 years
Ans: D
64:-Which one of the following is not a heat treatment process?
A:-Parkerising B:-Cyaniding C:-Mar tempering D:-Nitriding
Ans: A
65:-Which one of the following is a natural abrasive?
A:-Diamond B:-Silicon carbide C:-Boron carbide D:-Aluminium oxide
Ans: A
66:-Automotive starting motors are
A:-Series wound B:-Shunt wound C:-Both 1 and 2 D:-None of the above
Ans: C
67:-Gear reduction between the starting motor and the fly wheel is about
A:-5 B:-15 C:-25 D:-50
Ans: B
68:-Spark plug with white insulator tip indicates
A:-Advanced ignition B:-Retarded ignition C:-Leaded fuel D:-Gas leak
Ans: A
69:-Ignition timing can be adjusted by an
A:-Accurate clock B:-Stop watch C:-Stroboscopic light D:-Vacuum gauge
Ans: C
70:-The ratio of the distributor shaft and the crank shaft speed
A:-1 B:-`(1)/(4)` C:-`(1)/(2)` D:-2
Ans: C
71:-The contact breaker gap is mot accurately set by a
A:-Feeler gauge B:-Dial gauge C:-Dwell meter D:-None
Ans: A
72:-A discharged lead acid battery has on its plate
A:-Pb B:-PbO C:-`PbSO_4` D:-`PbSO_2`
Ans: C
73:-A maintenance-free battery
A:-Has lead-antimony plate B:-Lead-calcium plate C:-No acid D:-No water
Ans: B
74:-In a DC generator the magnetic field is produced in the
A:-Armature B:-Commutator C:-Starter D:-None of the above
Ans: C
75:-What is VIN number stands for
A:-Vehicle Index Number B:-Vehicle Identification Number C:-Vehicle Information Number D:-None
Ans: A
76:-Photo chemical smog is caused by the emission
A:-`NO_x` B:-`CO_2` C:-`CO_3` D:-`SO_2`
Ans: A
77:-Blow-by gases are emitted from
A:-Tail pipe B:-Crank case C:-Carburetor D:-Fuel tank
Ans: B
78:-The distance between the centres of the front wheel is called
A:-Track B:-Wheel base C:-Axle width D:-None of the above
Ans: A
79:-For the same compression ratio which is efficient
A:-Petrol engine is efficient B:-Diesel engine is efficient C:-Both are equally efficient D:-Cannot compare
Ans: A
80:-Ignition Quality of petrol is measured by
A:-Calorific value B:-Cetane number C:-Octane number D:-None of the above
Ans: C
81:-Sedan and wagons are the classifications of vehicles based on
A:-body shape B:-seating capacity C:-purpose D:-none of the above
Ans: A
82:-Octane no. of iso-octane is
A:-60 B:-70 C:-80 D:-100
Ans: D
83:-The vehicle specially designed for persons with disability
A:-Articulated vehicle B:-Omni vehicle C:-Motor cab D:-Invalid carriage
Ans: D
84:-Moment of inertia is also called
A:-First moment of area B:-Second moment of area C:-Third moment of area D:-None
Ans: B
85:-A system of forces consists of a number of forces acting on a body
A:-At the same time B:-In the same direction C:-One after the other in a given order D:-None of the above
Ans: A
86:-Two forces each of 100 N act at a point at an angle 60° with each other. The resultant is
A:-100 N B:-0 N C:-200 D:-173 N
Ans: D
87:-The effect of a couple acting on a body is to
A:-Keep the body in equilibrium B:-Rotate the body C:-Impart translator motion D:-None of the above
Ans: B
88:-In which of the following the centroid lies out of the section
A:-T section B:-Symmetrical I section C:-Unsymmetrical I section D:-Angle section
Ans: D
89:- The minimum number of rings in a piston is
A:-1 B:-2 C:-3 D:-4
Ans: C
90:-The purpose drawing the funicular polygon is to find
A:-The magnitude of the resultant B:-Direction of the resultant C:-The point at which resultant Acts D:-All of the above
Ans: D
91:-The phenomenon by which a material under tensile load continues to elongate slowly at a high temperature is known as A:-Fatigue B:-Resilience C:-Creep D:-Plasticity
Ans: C
92:-Internal resistance set up per unit area to resist deformation is known as
A:-Creep B:-Resilience C:-Strain D:-Unit stress
Ans: D
93:-Poisson's ratio is defined as The ratio of
A:-Shear stress to shear strain B:-Lateral stress to lateral strain
C:-Lateral strain to longitudinal strain D:-Lateral strain to longitudinal stress
Ans: C
94:-Which of the following should be followed for fuel efficient driving habit?
A:-steady driving B:-avoid frequent braking C:-speed range between 35-50 kmph D:-all of the above
Ans: D
95:-A fluid flow is said to be laminar if the Reynolds number is less than
A:-2000 B:-1500 C:-2500 D:-4000
Ans: A
96:-Poise is the unit of
A:-mass density B:-viscosity C:-kinematic viscosity D:-velocity gradient
Ans: C
97:-Surge tank in a pipe line is used to
A:-reduce loss of head B:-make flow uniform C:-relieve the pressure due to water hammer D:-none of the above
Ans: C
98:-If the head of a turbine is more than 300 m then the turbine used should be
A:-Francis B:-Kaplan
C:-Pelton D:-Propeller
Ans: C
99. The types of wheels preferred in sports cars are :
(A) disc wheel (B) wire wheel
(C) magnesium alloy wheel (D) aluminium alloy wheel
Ans: C
100. For identification the colour of tail light in a car is :
(A) White (B) Red (C) Green (D) Yellow
Ans: B
(A) Carburettor (B) Fuel pump (C) Fuel injector (D) Engine cylinder
Ans: D
52. The CB point gap is measured by using :
(A) Micrometer (B) Caliper (C) Pitch gauge (D) Feeler gauge
Ans: D
53. The most effective air cleaner for diesel engine is :
(A) Wet type air cleaner (B) Dry type air cleaner
(C) Water bath air cleaner (D) Oil bath air cleaner
Ans: D
54. The most commonly used car heater is :
(A) Diesel type (B) Petrol type (C) Hot water type (D) Hot air type
Ans: C
55:-The fuel which detonate easily is
A:-n-Heptane B:-Iso-octane C:-Benzene D:-Alcohol
Ans: A
56:-The size of a lathe is specified by
A:-Maximum distance between the centres B:-Length of bed
C:-Height of the centre measured from lathe bed D:-All of the above
Ans: D
57:-Which of the following method is used for taper turning in a lathe?
A:-back gear method B:-all gear drive C:-form tool method D:-none of the above
Ans: C
58:-The cutting tool in a milling machine is held in position
A:-arbour
B:-spindle
C:-column
D:-knee
Ans: A
59:-Which of the following metal has the least weldability
A:-carbon steel B:-stainless steel C:-iron D:-cast iron
Ans: B
60:-Which of the following is an example of plastic welding?
A:-arc welding B:-gas welding C:-fusion welding D:-forge welding
Ans: D
61:-Seam welding is
A:-An arc welding process B:-Gas welding process C:-Continuous spot welding process D:-None
Ans: C
62:-In thermit welding, the aluminium and iron oxide are mixed in the proportion of
A:-1:3 B:-1:1 C:-1:2 D:-2:1
Ans: A
63:-The validity of registration of a private vehicle is
A:-1 year B:-2 years C:-life time D:-15 years
Ans: D
64:-Which one of the following is not a heat treatment process?
A:-Parkerising B:-Cyaniding C:-Mar tempering D:-Nitriding
Ans: A
65:-Which one of the following is a natural abrasive?
A:-Diamond B:-Silicon carbide C:-Boron carbide D:-Aluminium oxide
Ans: A
66:-Automotive starting motors are
A:-Series wound B:-Shunt wound C:-Both 1 and 2 D:-None of the above
Ans: C
67:-Gear reduction between the starting motor and the fly wheel is about
A:-5 B:-15 C:-25 D:-50
Ans: B
68:-Spark plug with white insulator tip indicates
A:-Advanced ignition B:-Retarded ignition C:-Leaded fuel D:-Gas leak
Ans: A
69:-Ignition timing can be adjusted by an
A:-Accurate clock B:-Stop watch C:-Stroboscopic light D:-Vacuum gauge
Ans: C
70:-The ratio of the distributor shaft and the crank shaft speed
A:-1 B:-`(1)/(4)` C:-`(1)/(2)` D:-2
Ans: C
71:-The contact breaker gap is mot accurately set by a
A:-Feeler gauge B:-Dial gauge C:-Dwell meter D:-None
Ans: A
72:-A discharged lead acid battery has on its plate
A:-Pb B:-PbO C:-`PbSO_4` D:-`PbSO_2`
Ans: C
73:-A maintenance-free battery
A:-Has lead-antimony plate B:-Lead-calcium plate C:-No acid D:-No water
Ans: B
74:-In a DC generator the magnetic field is produced in the
A:-Armature B:-Commutator C:-Starter D:-None of the above
Ans: C
75:-What is VIN number stands for
A:-Vehicle Index Number B:-Vehicle Identification Number C:-Vehicle Information Number D:-None
Ans: A
76:-Photo chemical smog is caused by the emission
A:-`NO_x` B:-`CO_2` C:-`CO_3` D:-`SO_2`
Ans: A
77:-Blow-by gases are emitted from
A:-Tail pipe B:-Crank case C:-Carburetor D:-Fuel tank
Ans: B
78:-The distance between the centres of the front wheel is called
A:-Track B:-Wheel base C:-Axle width D:-None of the above
Ans: A
79:-For the same compression ratio which is efficient
A:-Petrol engine is efficient B:-Diesel engine is efficient C:-Both are equally efficient D:-Cannot compare
Ans: A
80:-Ignition Quality of petrol is measured by
A:-Calorific value B:-Cetane number C:-Octane number D:-None of the above
Ans: C
81:-Sedan and wagons are the classifications of vehicles based on
A:-body shape B:-seating capacity C:-purpose D:-none of the above
Ans: A
82:-Octane no. of iso-octane is
A:-60 B:-70 C:-80 D:-100
Ans: D
83:-The vehicle specially designed for persons with disability
A:-Articulated vehicle B:-Omni vehicle C:-Motor cab D:-Invalid carriage
Ans: D
84:-Moment of inertia is also called
A:-First moment of area B:-Second moment of area C:-Third moment of area D:-None
Ans: B
85:-A system of forces consists of a number of forces acting on a body
A:-At the same time B:-In the same direction C:-One after the other in a given order D:-None of the above
Ans: A
86:-Two forces each of 100 N act at a point at an angle 60° with each other. The resultant is
A:-100 N B:-0 N C:-200 D:-173 N
Ans: D
87:-The effect of a couple acting on a body is to
A:-Keep the body in equilibrium B:-Rotate the body C:-Impart translator motion D:-None of the above
Ans: B
88:-In which of the following the centroid lies out of the section
A:-T section B:-Symmetrical I section C:-Unsymmetrical I section D:-Angle section
Ans: D
89:- The minimum number of rings in a piston is
A:-1 B:-2 C:-3 D:-4
Ans: C
90:-The purpose drawing the funicular polygon is to find
A:-The magnitude of the resultant B:-Direction of the resultant C:-The point at which resultant Acts D:-All of the above
Ans: D
91:-The phenomenon by which a material under tensile load continues to elongate slowly at a high temperature is known as A:-Fatigue B:-Resilience C:-Creep D:-Plasticity
Ans: C
92:-Internal resistance set up per unit area to resist deformation is known as
A:-Creep B:-Resilience C:-Strain D:-Unit stress
Ans: D
93:-Poisson's ratio is defined as The ratio of
A:-Shear stress to shear strain B:-Lateral stress to lateral strain
C:-Lateral strain to longitudinal strain D:-Lateral strain to longitudinal stress
Ans: C
94:-Which of the following should be followed for fuel efficient driving habit?
A:-steady driving B:-avoid frequent braking C:-speed range between 35-50 kmph D:-all of the above
Ans: D
95:-A fluid flow is said to be laminar if the Reynolds number is less than
A:-2000 B:-1500 C:-2500 D:-4000
Ans: A
96:-Poise is the unit of
A:-mass density B:-viscosity C:-kinematic viscosity D:-velocity gradient
Ans: C
97:-Surge tank in a pipe line is used to
A:-reduce loss of head B:-make flow uniform C:-relieve the pressure due to water hammer D:-none of the above
Ans: C
98:-If the head of a turbine is more than 300 m then the turbine used should be
A:-Francis B:-Kaplan
C:-Pelton D:-Propeller
Ans: C
99. The types of wheels preferred in sports cars are :
(A) disc wheel (B) wire wheel
(C) magnesium alloy wheel (D) aluminium alloy wheel
Ans: C
100. For identification the colour of tail light in a car is :
(A) White (B) Red (C) Green (D) Yellow
Ans: B