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Compare flywheel with Governer.

Difference between Flywheel and Governor
1.Function- To control the speed variations 1.Function- To regulate the mean speed of
caused by fluctuations of engine turning engine within prescribed limit when there
moment during a cycle. are variations of load.
2. Flywheel acts as a reservoir; it stores 2. A governor regulates the speed by
energy due to its mass moment of inertia regulating the quantity of charge/working
and releases energy when required during a fluid of prime mover.

Draw the sketch of multiplate clutch and describe its construction and working.

Multi – Plate clutch consists of a number of clutch plates instead of only one clutch plate like in
the Single plate clutch.
Friction surface also increased because of a number of clutch plates. Because of number of
friction surfaces, the capacity of the clutch to transmit torque is also increased.
The plates are alternately fitted to the engine crankshaft and gearbox shaft. They are firmly
pressed by strong coil springs and assembled in a drum type casing.

Explain with neat sketch compound type Gear Train. Derive the equation for velocity ratio of gear train. Write it's application.

Compound Gear Train:
When there are more than one gear on a shaft, as shown in Fig. , it is called a compound
train of gear. In a simple train of gears do not affect the speed ratio of the system. But these gears
are useful in bridging over the space between the driver and the driven.
Gear trains inside a mechanical watch
But whenever the distance between the driver and the driven or follower has to be bridged
over by intermediate gears and at the same time a great ( or much less ) speed ratio is required,

Define following terms (i) (ii) (iii) (iv) (v) (vi) Kinematic link Kinematic pair Kinematic chain Mechanism Machine Inversion

(i) Kinematic link: Each part of a machine, which moves relative to some other part, is known as a
kinematic link.
(ii) Kinematic pair: The two links or elements of a machine, when in contact with each other, are said to
form a pair. If the relative motion between them is completely or successfully constrained (i.e. in a
definite direction), the pair is known as kinematic pair.
(iii) Kinematic chain: When the kinematic pairs are coupled in such a way that the last link is joined to the

Draw and explain the turning moment diagram of 4-stroke I.C. Engine.

A turning moment diagram for a four stroke cycle internal combustion engine is shown. We know
that in a four stroke cycle internal combustion engine, there is one working stroke after the crank
has turned through two revolutions, i.e. 720° (or 4 ð radians). Turning moment diagram for a four
stroke cycle internal combustion engine.
Since the pressure inside the engine cylinder is less than the atmospheric pressure during
the suction stroke, therefore a negative loop is formed as shown in Fig. During the compression


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