For a spark plug designated M 14x1.25, the last digit 1.25 stands for
Gap between electrodes in mm
Electrode diameter in cm
Width of tip in mm
Pitch of plug thread
A hot plug has
Long insulation
Long threaded portion
Long path for heat dissipation
Is generally used in heavy duty, high speed engines
White deposits on the face of a spark plug suggest that
Spark plug is of too high rating
Mixture is too rich
The engine is excessively advanced
Too large a gap between the electrodes
Which is not the function of condenser connected across the contact breaker?
Make and break the primary ignition circuit
Provide rapid collapse and reversal of magnetic field in the coil
Induce high voltage in the secondary circuit
Minimize arcing and pitting of contanct breaker points
The function of distributer in the ignition system of a petrol engine is to
Provide ignition advance
Produce high voltage for sparking
Time the spark
Distribute the current
The speeds of distributor shaft and the crankshaft conform to the ratio
1:1
1:2
1:4
2:1
The centrifugal advance mechanism is located in the
Cam shaft gear
Crankshaft
Valve actuating mechanism
Distributor
Induction coil
The spark advance is usually specified in terms of
Engine speed in rev/ sec
Time in seconds
Degrees of crank rotation
Piston displacement from TDC
The most commonly used friction material for clutch facings is
Cork
Fabric
Asbestos
Leather
Identify the vehicle which is generally provided with four wheel drive?
Ambassador car
Maruti van
Swaraj mazada
Jeep
Which one of the followings is a front wheel drive?
Premier padmini
Ambassador car
Maruti car
Standard gazel
Which aspect is not correct in the context of manual transmission; conventionally called gear boxes?
Simplicity of design
High friction losses
Low initial cost
Lot of fatigue to driver in operation
The number of gear boxes used in four wheel drive is
One
Two
Four
Depends on the design of vehicle
Two speed reverse gear arrangement is generally provided on
Light commercial vehicles
Cars
Tractors
Jeeps and military vehicles
The use of helical gears rather than spur gears in the transmission system has the advantage of
Quiet running
Economy
Less end thrust
Strength