THEORY OF MACHINE QUIZ

In a single slider crank chain

One is a turning pair and three are sliding pairs

Each of the four pairs is a turning pair

Two are turning pairs and two are sliding pairs

Three are turning pairs and one is a sliding pair

TRUE ANSWER : ?
YOUR ANSWER : ?

In vibration isolation system, if ω/ωn < 2, then for all values of damping factor, the transmissibility will be (where ω = Angular speed of the system, ωn = Natural frequency of vibration of the system)

Less than unity

Zero

Greater than unity

Equal to unity

TRUE ANSWER : ?
YOUR ANSWER : ?

The purpose of a link is to

All of these

Guide other links

Act as a support

Transmit motion

TRUE ANSWER : ?
YOUR ANSWER : ?

The natural frequency of free longitudinal vibrations is equal to (where m = Mass of the body, s = Stiffness of the body, and δ = Static deflection of the body)

Any one of the listed here

0.4985/√δ

1/2π × √(s/m)

1/2π × √(g/δ)

TRUE ANSWER : ?
YOUR ANSWER : ?

If the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then energy stored in the latter at the same speed will be

Same as the first one

One and a half times the first one

One fourth of the first one

Four times the first one

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following property of the instantaneous center is correct?

A rigid link rotates instantaneously relative to another link at the instantaneous centre for the configuration of the mechanism considered.

All of these

The velocity of the instantaneous centre relative to any third rigid link is same whether the instantaneous centre is regarded as a point on the first rigid link or on the second rigid link.

The two rigid links have no linear velocity relative to each other at the instantaneous centre.

TRUE ANSWER : ?
YOUR ANSWER : ?

The steering of a ship means

Turning of a complete ship in a curve towards right or left, while it moves forward

Rolling of a complete ship sideways

None of these

Movement of a complete ship up and down in vertical plane about transverse axis

TRUE ANSWER : ?
YOUR ANSWER : ?

The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity ω₁ rad/s in the clockwise direction and the link OB turns with angular velocity ω₂ rad/s in the clockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)

(ω₁ - ω₂)r

ω₁.ω₂.r

(ω₁ + ω₂)r

(ω₁ - ω₂)2r

TRUE ANSWER : ?
YOUR ANSWER : ?

The cam follower generally used in aircraft engines is

Knife edge follower

Roller follower

Spherical faced follower

Flat faced follower

TRUE ANSWER : ?
YOUR ANSWER : ?

The periodic time is given by (where ω = Angular velocity of the particle in rad/s)

π/ω

2π/ω

ω/2π

ω × 2π

TRUE ANSWER : ?
YOUR ANSWER : ?