A battery can be charged by
Adding distilled water
Adding sulphuric acid
Applying voltage in the reverse direction to that of charging
Applying a voltage in the same direction to that of charging
Correct Answer :
C. Applying voltage in the reverse direction to that of charging
Related Questions
In which of the following conditions, the idle CO percentage should be measured with the vehicle?
Headlights and other electrical devices are switched off
Headlights and other electrical devices are switched on
Headlights and other lights are switched off
Headlights are switched on
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 comparison with a radial tyre, one advantage of a bias ply tyre is
Longer life
Lower rolling resistance
Smoother ride at low speeds
None of these
The two rows of cylinders in a 'V' type engine are generally arranged at
45°
60°
90°
130°
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 exhaust gas from petrol engine contains
Petrol vapours
Water vapours
Carbon monoxide
All of these
The information provided by the oxygen (O₂) sensor to the feedback control system is about the
Air-fuel ratio
Air temperature
Air flow speed
Exhaust gas volume
The commonly used antifreeze solution in automobiles is
Carbon disulphide
Ethylene glycol
Ammonium chloride
Freon-12
The negative plates of a lead acid battery has
Lead peroxide (PbO₂)
Spongy lead (Pb)
Lead sulphate (PbSO₄)
Sulphuric acid (H₂SO₄)
The combustion process in a Diesel engine is a
Constant volume process
Constant pressure process
Constant temperature process
Adiabatic process
The calorific value of petrol is about
36.5-38.5 MJ/kg
39.4-42.5 MJ/kg
42.7-43.5 MJ/kg
45.5-47 MJ/kg
The octane rating of petrol commercially available is
85-95
95-100
100-110
110-125
The main function of the tread pattern on tyre is that
The tread grooves pass air between the tyre and road surface, thereby preventing tyre from overheating
The crests between the tread grooves absorb road noise
In wet conditions, the tread grooves expel water that is drawn between the tyre and road surface
The tread pattern protects the tyre's inner carcass from small stones and pieces of glass
The basic purpose of a four wheel drive (4WD) system is that it
Delivers improved cornering on dry road surfaces
Eliminates the need of snow tyres, tyre chains, etc.
Ensures effective transmission of engine torque to all four wheels, even on slippery road surfaces
Ensures that effective braking can be performed, even on slippery surfaces
The boiling point of Diesel fuel is in the range of
70°C to 100°C
100°C to 120°C
120°C to 180°C
180°C to 360 °C
Which of the following is not a part of the chassis?
Wheels
Front axle
Steering system
Seats
The best fuels for compression ignition engines are
Straight chain paraffin
Aromatics
Branched chain paraffin
Naphthalene
A traction control system (TCS) in automobiles controls the
Vibrations on the steering wheel
Engine power during acceleration
Torque that is transmitted by the tyres to the road surface
Stopping distance in case of emergency
An underinflated tyre will wear the tread most
Near the centre
Near the edges
In the lateral direction
In the cross direction
The most commonly used power plant in automobiles is
Gas turbine
I.C. engine
Battery
None of these
Caster is a
Forward tilt of the kingpin
Backward tilt of the kingpin
Either 'A' or 'B'
None of these
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
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
The reconditioning process used to give cylinder bore surfaces a crosshatch pattern, is known as
Honing
Porous plating
Boring
Shot peening
Which of the following is not an automobile?
Motor cycle
Passenger car
Aeroplane
Truck
The coefficient of rolling resistance for a truck weighing 63,500 N is 0.018. The rolling resistance to the truck is
1.143 N
11.43 N
114.3 N
1143 N
When the piston is at T.D.C, the volume above the piston in the combustion chamber is the
Clearance volume
Cylinder volume
Exhaust volume
None of these
The function of a second ring is that it is a
Back up compression ring which will work in place of the top ring when it is broken
Compression ring and aids the top ring in sealing and cooling
Back up oil control ring which will work in place of the bottom ring when it is broken
Cushion ring which prevents piston slap and knock
The advantage of a tubeless tyre over tube type tyre is
Slow air leakage
Better fuel efficiency
Less chances of running flat
All of these
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