# Mech Engineering: IC/Automobile Engine II online Test

What material is used for the insulating body of a spark plug?
Silica
Dolomite
Alumina
Glass
The fuel injector in a diesel engine
Draw the fuel from the fuel tank
Sprays atomized fuel into the cylinder
Sends the extra fuel back to the feed pump
Provides necessary air-fuel mixture for combustion
The gap between the electrodes of a spark plug is nearly________
0.2 to 0.4 mm
0.45 to 0.6 mm
0.6 to 0.8 mm
0.8 to 1.2 mm
The sparking voltage at the spark plug in a petrol engine is
500 to 1000 volt
1000 to 5000 volt
5000 to 8000 volt
10000 to 15000 volt
In a cycle, the spark roughly lasts for
0.001 sec
0.01 sec
0.1 sec
1 sec
Side members of frame may undergo lateral bending due to
Weight of vehicle
Engine torque
Side wind
Sudden impact during collision
Distortion of frame to a parallelogram shapes may be caused by
Cornering force while taking a turn
Braking torque
Weight of vehicle and passengers
Engine and braking torques result in
Longitudinal torsion
Bending of side members in vertical plane
Lateral bending of side members
Distortion of frame to parallelogram shape
Identify the component which constitutes a disengagble connection between engine and transmission system of a vehicle.
Stub axle
Fly wheel
Clutch
Propeller shaft
The clutch is located between the engine and
Gear box
Differential gear
Rear axle
Universal joint
A stone tied to the end of a string 1000 cm ling is whirled in a horizontal circle with a constant speed. If the stone makes 15 revolutions in 30 seconds, the acceleration of the stone is closest to_______
315 cm/s2
630 cm/s2
985 cm/s2
3950 cm/s2
Which is true in respect of clutch plate and engine flywheel in an automobile?
The clutch plate gets connected to the flywheel when the driver presses the clutch pedal
The clutch plate gets disconnected when the clutch pedal is pressed
Clutch plate is always connected to the flywheel
The clutch plate always remains disconnected from the flywheel
The clutch facing can withstand, without being damaged, a maximum pressure intensity of about
10 kPa
50 kPa
100 kPa
1000 kPa
The coefficient of friction for the clutch facings is approximately
1.0
0.75
0.4
0.1
The pressure plate is held against the clutch plate by
Struts
Levers
Thrust bearings
Springs
Which aspect is not correct in the context of wet clutch when compared with dry type?
Clutch plate wetted by oil circulation
Greater torque capacity
Longer life
Can tolerate long engagement times
Which is not true in the context of the free wheel clutch?
Simplified gear changing at low speeds
Transmission subjected to greater wear and tear
Effective use of brakes needed to stop the vehicle on a downward slope
Appreciable saving in fuel on long downward slope
Description:

A series of tests is launched to offer the students of Mechanical Engineering to help them in checking their level of knowledge. These tests will contribute in building the aptitude of the students in various topics of Mechanical engineering. Majority of the questions are from IC engines and Automobile Engineering.

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