The crankcase dilution means
Dilution of fuel in the crankcase
Dilution of oil by water in the crankcase
Dilution of lubrication oil by fuel in the crankcase
Dilution of mixture passing through crankcase in two stroke engines
Correct Answer :
C. Dilution of lubrication oil by fuel in the crankcase
Related Questions
The engine oil is stored in __________ when the engine is not running.
Oil pan
Cylinder head
Oil pump
Separate oil tank
The difference between DOT 3 and DOT 4 brake fluids is
DOT 4 fluids have a higher boiling point than DOT 3 fluid
DOT 4 fluids have a lower boiling point than DOT 3 fluid
DOT 3 and DOT 4 fluids have the same boiling point, but DOT 4 fluid has a longer service life
DOT 4 fluid is more resistant to freezing than DOT 3 fluid
The painting of automobiles is done to
Prevent rust from growing on the body
Improve its external appearance
Retain the characteristics of steel for long
All of these
The reconditioning process used to give cylinder bore surfaces a crosshatch pattern, is known as
Honing
Porous plating
Boring
Shot peening
In a hydraulic power steering system, the power steering pump is driven by a
Belt driven by camshaft
Chain driven by crankshaft
Belt driven by driveshaft
Belt driven by crankshaft
The vehicle ride will be comfortable if
Unsprung mass is kept minimum
Sprang mass is kept minimum
Vehicle mass is kept minimum
All of these
The negative terminal post on the top of a battery is
Smaller than the positive terminal post
Larger than the positive terminal post
Of the same size as the positive terminal post
None of these
The calorific value of Diesel is about
36.5 MJ/kg
38.5 MJ/kg
42.5 MJ/kg
45.5 MJ/kg
The air resistance to a car at 20 kmph is R. The air resistance at 40 kmph will be
R
2 R
4R
4 R²
Damper is also known as
Shock absorber
Torsion bar
Spring
Radius rod
In a four speed four stroke Diesel engine, the intake valve
Opens at T.D.C. and closes at B.D.C.
Opens at 20° before T.D.C. and closes at 35° after B.D.C.
Opens at 10° after T.D.C. and closes at 20° before B.D.C.
None of the above
Which of the following is not an automobile?
Motor cycle
Passenger car
Aeroplane
Truck
Tachometer in a vehicle measures
Speed
Distance
Engine r.p.m.
Fuel consumption
If a tyre is designated as 175/65 R-14 82-S, then the aspect ratio for the tyre is
175
65
14
82
The maximum torque multiplication ratio in a torque converter is about
2.5
10
25
40
The lower cylindrical portion of the piston which improves piston cooling performance is called
Piston crown
Connecting rod
Piston pin boss
Piston skirt
Highest useful compression ratio (HUCR) is the highest compression ratio at which the
Engine can run
Engine gives maximum output
Engine is most efficient
Fuel can be used in a test engine without knocking
It is necessary to maintain the valve clearances as they
Reduce the resistance to sliding that occurs between the cam and the tappet
Allow for lengthening of the valves owing to the heat of combustion
Increase the speed at which the valves move up and down
Make the crankshaft turn smoothly
The function of a first compression ring (top ring) is that it
Increases the combustion temperature
Creates swirl
Maintains a seal and prevents the fuel leakage
Maintains a seal and prevents escape of burned gases and loss of pressure in the combustion chamber
The engine oil viscosity is defined by _________ ratings.
Automatic transmission fluid (ATF)
Society of automotive engineers (SAE)
Gross vehicle weight (GVW)
American petroleum institute (API)
In a four wheel drive (4WD), the numbers of gear boxes are
1
2
3
4
Petrol that detonates easily is called
High octane petrol
Low octane petrol
Unleaded petrol
Blended fuel
Bead wires are made of
Steel
Copper
Zinc
Aluminium
The engine oil level should be checked
Immediately after the ignition switch is turned off
While the engine is running
A few minutes after the ignition switch is turned off
While the engine is running at high idle speed
Thinner is added to the paint in order to
Make pigments and resin mix easily
Make paint film hard
Optimise its viscosity
None of these
With the increase of battery temperature, the specific gravity of electrolyte
Increases
Decreases
Remains the same
None of these
The temperature indicating instrument in vehicles indicates the temperature of
Engine piston
Engine cylinder
Lubricating oil
Jacket cooling water
In a forced feed lubrication system, the device used to guard against excessive oil pressure, is known as
Release chamber
Balancer
Relief valve
Stop valve
In a ventilated disc brake
A duct directs air towards the caliper for cooling while the vehicle is moving
Caliper is covered with cooling fins
Disc contains many small holes for optimum cooling performance
Disc contains radial vanes between its rubbing surfaces for optimum cooling performance
The parking brake generally acts on
Front wheels
Rear wheels
Front and rear wheels
Propeller shaft