The main function of a resonator is that it
Regulates the intake air flow rate
Reduces the intake air noise
Enhances intake efficiency
Regulates the intake air temperature
Correct Answer :
B. Reduces the intake air noise
Related Questions
The process of supplying the intake air to the engine cylinder at a pressure greater than the pressure of the surrounding atmosphere is known as
Supercharging
Auto ignition
Scavenging
Detonation
One effect of detonation is
Delay in ignition
Loss of power
Overheating of engine
Overcooling of engine
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
How many cells are used in a 12 volt car battery?
2
4
6
8
The purpose of turning radius gauges is to measure the
Contact areas of the tyres
Free plays of the steering wheel
Turning radius of the left and right wheels
Difference in the toe angles of the left and right wheels
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 temperature at which tyre inflation pressure should be checked is
20°C
25°C
35°C
Ambient temperature
A four cylinder engine has a capacity of 2.4 litres. The swept volume of one cylinder is
400 cm³
600 cm³
1200 cm³
2400 cm³
In a four cylinder inline engine, the number of firing strokes in one revolution of the crank is
1
2
3
4
The petrol engines are also known as
Spark ignition (S.I.) engines
Compression ignition (C.I.) engines
Steam engines
None of these
The effect of vapour locking on the brake performance is that the
Brakes function more effectively
Brakes fail completely
Brake operation is delayed after depression of the brake pedal
Vapour locking has no effect on brake performance
The valve tappet clearance is measured by
Screw pitch gauge
Engineering scale
Feeler gauge
Vernier caliper
The indicated power of a four stroke engine (in watts) is equal to (where P = Mean effective pressure in N/m², L = Length of stroke in metres, A = Cross-sectional area of the piston in m², and N = Speed of the engine in revolutions per second (r.p.s)
P.L.A.N/2
P.L.A.N
2 × P.L.A.N
P.L.A.N/4
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
The basic purpose of tyre rotation on automobiles is to
Avoid ply separation
Equalize wear
Get better ride
None of these
The temperature indicating instrument in vehicles indicates the temperature of
Engine piston
Engine cylinder
Lubricating oil
Jacket cooling water
The valve overlap in four stroke petrol engines is approximately
30°
60°
90°
120°
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
Tachometer in a vehicle measures
Speed
Distance
Engine r.p.m.
Fuel consumption
Wheel base of a vehicle is the
Distance between the centres of the front and rear wheels
Distance between the centres of the front tyres
Distance between the centres of the rear tyres
Extreme length of the vehicle
A worm gear is used as the pinion for the rack and pinion type of steering gearbox, because it
Improves steering comfort when steering wheel is turned to effect small changes in the direction of forward motion
Allows the steering wheel to be turned by a greater amount when steering
Makes the steering more responsive
Reduces the amount of kickback for large steering angles
When turning a corner
The front wheels are toeing out
The front wheels are turning on different angles
The inside front wheels has a greater angle than the outside wheel
All of the above
The condition that results in large quantities of HC emission is
High temperature combustion
Incomplete combustion
Low temperature combustion
High atmospheric temperature combustion
The basic characteristics of a brake fluid is
A high boiling point
Low viscosity
Compatibility with rubber and metal parts
All of these
In a Diesel engine, the fuel is ignited by
An electric spark
The heat of compression
The hot exhaust
None of these
The ease with which petrol vaporizes is called its
Oxidation
Octane number
Volatility
Cetane number
In order to implement gear changes in the gear unit of an automatic transmission, a ________ is used.
Synchronizer
Planetary gear
Magnetic clutch
Hydraulic multi plate clutch
The sequence order of events in a four stroke engine is
Suction exhaust power compression
Suction power compression exhaust
Suction compression power exhaust
Exhaust compression power suction
The commonly used antifreeze solution in automobiles is
Carbon disulphide
Ethylene glycol
Ammonium chloride
Freon-12
The starting system includes
A battery, a starter, and an ignition switch
A battery, a distributor, and an ignition switch
A battery, a starter, and a distributor
A distributor, a starter, and an ignition switch