The combustion process in a Diesel engine is a
Constant volume process
Constant pressure process
Constant temperature process
Adiabatic process
Correct Answer :
B. Constant pressure process
Related Questions
Which one of the following statement correctly describes the construction of a bevel gear type differential?
The drive shafts are splined to the differential carrier.
The left side gear and the differential carrier rotate in constant unison.
The differential carrier houses differential pinion gears and side gears; each pinion gear meshes with a different side gear.
The differential carrier houses differential pinion gears and side gears
The connecting rod lower end is connected to the relevant ________ of crankshaft.
Big end
Crank arm
Journal
Small end
The fuel pump of a programmed fuel injection (PFI) system operate for two seconds when the ignition is turned to the start position to
Enable the pump's fault diagnosis function to operate
Warm up and lubricate the pump
Supplies a large amount of fuel and thereby creates a choke effect
Pressurise the fuel system before the engine is started
In a single dry plate clutch, torsional vibrations are absorbed by
Coil springs known as torsional springs
Cushion springs
Central hub
Clutch pedal
Incorrect steering axis inclination (S.A.I.) causes
Tendency to assume toe-out orientation
Generation of a braking effect at tight corners
Poor recovery of the steering wheel after making a turn
The vehicle to pull to the side of lesser inclination
A three way catalytic converter
Re-circulates exhaust gases
Burns fuel vapour gases
Reduces N₂, H₂O, and CO₂ emission levels
Removes CO, HC, and NO₂ from the exhaust gasses passing through it
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 component in the radiator of an automobile that increases the boiling point of water is
Drain plug
Water jacket
Vacuum valve
Pressure cap
Which of the following is not a part of the chassis?
Wheels
Front axle
Steering system
Seats
The formula for Isooctane is
C8H18
C7H17
C6H18
C7H18
The main feature of Macpherson strut suspension is that
The vertical size of the suspension can be made more compact
Non vertical external forces are supported by the suspension arms
The unsprung mass in lighter
The assembly is slightly more complicated in design
The most commonly used power plant in automobiles is
Gas turbine
I.C. engine
Battery
None of these
The firing order for an inline four cylinder I.C. engine is
1-2-3-4
1-3-4-2
1-2-4-3
1-3-2-4
The frequency of flashing of light per minute in a direction (side turn) indicator is about
9
90
900
9000
The clutch is located between the transmission and the
Engine
Rear axle
Propeller shaft
Differential
Which of the following parameter can be adjusted by modifying the tie rod attachment length?
Camber
Caster
Toe
Steering gear ratio
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 gradient resistance to a vehicle having a mass of 980 kg moving on an incline of 10° is
1.6694 N
16.694 N
166.94 N
1669.4 N
In aluminium cylinder blocks, the cylinder liners are made of
Aluminium
Ceramic
Brass
Cast iron
The minimum parking brake force is generally ________ of gross vehicle mass (GVM).
5 %
10 %
15 %
20 %
Which of the following is not an automobile?
Motor cycle
Passenger car
Aeroplane
Truck
The antiknock property of compression ignition engine fuel can be improved by adding
Tetraethyl lead
Trimethyl pentane
Amyl nitrate
Hexadecane
The process of removing the burnt gases from the engine cylinder by the fresh charge coming into the engine cylinder from the crankcase, is known as
Cleaning
Priming
Scavenging
Detonation
In a petrol engine, the high voltage for spark plug is in the order of
1000 volts
2000 volts
11 kilovolts
22 kilovolts
The maximum torque multiplication ratio in a torque converter is about
2.5
10
25
40
The starter motor is driven by
Chain drive
Gear drive
Flat belt drive
V-belt drive
The basic characteristics of a brake fluid is
A high boiling point
Low viscosity
Compatibility with rubber and metal parts
All of these
The condition that causes vapour locking in a brake system is
Overheating of the fluid due to frequent brake application
Overcooling of the brakes during high speed driving
Keeping the vehicle without use for an extended period
An excessively high engine speed on a downhill road
An overinflated tyre will wear the tread most near the
Edges
Corners
Centre
None of these
Bead wires are made of
Steel
Copper
Zinc
Aluminium