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4

The tendency of a body to resist change from rest or motion is known as

A. Mass

B. Friction

C. Inertia

D. Resisting force

Correct Answer :

C. Inertia


Related Questions

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4

For simple harmonic motion of the of follower, a cosine curve represents

A. Displacement diagram

B. Velocity diagram

C. Acceleration diagram

D. All of the above

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4

When the elements of a pair are kept in contact by the action of external forces, the pair is said to be a

A. Lower pair

B. Higher pair

C. Self-closed pair

D. Force-closed pair

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4

The unbalanced force due to revolving masses

A. Varies in magnitude but constant in direction

B. Varies in direction but constant in magnitude

C. Varies in magnitude and direction both

D. Constant in magnitude and direction both

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4

The number of links and instantaneous centers in a reciprocating engine mechanism are

A. 4, 4

B. 4, 5

C. 5, 4

D. 4, 6

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4

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 anticlockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)

A. ω₁.ω₂.r

B. (ω₁ - ω₂) r

C. (ω₁ + ω₂) r

D. (ω₁ - ω₂) 2r

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4

The velocity of a particle moving with simple harmonic motion, at any instant is given by (where ω = Displacement of the particle from mean position)

A. ω √(x² - r²)

B. ω √(r² - x²)

C. ω² √(x² - r²)

D. ω² √(r² - x²)

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4

The equation of motion for a vibrating system with viscous damping is (d²x/dt²) + (c/m).(dx/dt) + (s/m).x = 0, if the roots of the equation are __________ then the system will be under damped.

A. Equal

B. Real

C. Complex conjugate

D. None of these

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4

Cylindrical cams can be classified as

A. Circular

B. Tangent

C. Reciprocating

D. None of the above

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4

Which of the following statement is correct as regard to the difference between a machine and a structure?

A. The parts of a machine move relative to one another, whereas the members of a structure do not move relative to one another

B. The links of a machine may transmit both power and motion, whereas the members of a structure transmit forces only

C. A machine transforms the available energy into some useful work, whereas in a structure no energy is transformed into useful work

D. All of the above

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4

If the controlling force line for a spring controlled governor when produced intersects the Y-axis at the origin, then the governor is said to be

A. Stable

B. Unstable

C. Isochronous

D. None of these

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4

The steering of a ship means

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

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

C. Rolling of a complete ship sideways

D. None of the above

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4

Which of the following is used to control the speed variations of the engine caused by the fluctuations of the engine turning moment?

A. D-slide valve

B. Governor

C. Flywheel

D. Meyer's expansion valve

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4

Oldhams coupling is an inversion of the kinematic chain used in

A. Whitworth quick return mechanism

B. Elliptical trammels

C. Rotary engine

D. Universal joint

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4

A combination of kinematic pairs, joined in such a way that the relative motion between the links is completely constrained, is called a

A. Structure

B. Mechanism

C. Kinematic chain

D. Inversion

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4

The pressure angle of a cam depends upon

A. Offset between centre lines of cam and follower

B. Lift of follower

C. Angle of ascent

D. All of the above

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4

In a ball bearing, ball and bearing forms a

A. Turning pair

B. Rolling pair

C. Screw pair

D. Spherical pair

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4

A Hartnell governor has its controlling force (Fc) given by Fc = ar + b, where r is the radius of rotation and a and b are constants. The governor becomes isochronous when

A. a is +ve and b = 0

B. a = 0 and b is +ve

C. a is +ve and b is -ve

D. a is +ve and b is also +ve

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4

When the two elements of a pair have __________ when in motion, it is said to a lower pair.

A. Line or point contact

B. Surface contact

C. Body contact

D. None of these

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4

A mass of 1 kg is attached to the end of a spring with a stiffness of 0.7 N/mm. The critical damping coefficient of this system is

A. 1.4 N-s/m

B. 18.52 N-s/m

C. 52.92 N-s/m

D. 529.2 N-s/m

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4

The critical speed of a shaft with a disc supported in between is equal to the natural frequency of the system in

A. Transverse vibrations

B. Torsional vibrations

C. Longitudinal vibrations

D. All of these

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4

A shaft carrying three rotors will have

A. No node

B. One node

C. Two nodes

D. Three nodes

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4

When two links are connected by a pin joint, their instantaneous centre lies

A. On their point of contact

B. At the centre of curvature

C. At the centre of circle

D. At the pin joint

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4

The mechanism consisting of three turning pairs and one sliding pair, is called a

A. Single slider crank chain

B. Whitworth quick return motion mechanism

C. Crank and slotted lever quick return motion mechanism

D. All of the above

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4

Which of the following is an open pair?

A. Ball and socket joint

B. Journal bearing

C. Lead screw and nut

D. Cam and follower

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4

The size of cam depends upon

A. Base circle

B. Pitch circle

C. Prime circle

D. Pitch curve

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4

Which of the following is an example of a higher pair?

A. Toothed gearing

B. Belt and rope drive

C. Ball and roller bearing

D. All of these

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4

With single Hooke's joint it is possible to connect two shafts, the axes of which have an angular misalignment up to

A. 10°

B. 20°

C. 30°

D. 40°

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4

Coriolis component acts

A. Perpendicular to sliding surfaces

B. Along sliding surfaces

C. Somewhere in between above two

D. None of the above

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4

In automobiles the power is transmitted from gear box to differential through

A. Bevel gear

B. Universal joint

C. Hooke's joint

D. Knuckle joint

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4

Bifilar suspension method is used to find the

A. Angular acceleration of the body

B. Moment of inertia of the body

C. Periodic time of the body

D. Frequency of vibration of the body