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4

The included angle between the sides of V-belt is

A. 40°

B. 45°

C. 38°

D. 60°

Correct Answer :

A. 40°


Related Questions

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4

When a close coiled helical spring is compressed, its wire is subjected to

A. Tension

B. Shear

C. Compression

D. All of the above

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4

Resilience of a material is important, when it is subjected to

A. Combined loading

B. Fatigue

C. Thermal stresses

D. Shock loading

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4

Maximum principal stress theory is applicable for

A. Ductile materials

B. Brittle materials

C. Elastic materials

D. All of the above

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4

Applications in which stresses are encountered in one direction only uses following type of threads

A. Metric

B. Buttress

C. Acme

D. Square

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4

A sliding bearing in which although lubricant is present, the working surfaces __________ contact each other at least part of the time, is called boundary lubricated bearing.

A. Partially

B. Fully

C. Either A or B

D. None of these

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4

Wahl's stress factor __________ very rapidly as the spring index decreases.

A. Increases

B. Decreases

C. Remain same

D. None of these

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4

In V-belt drive, belt touches

A. At bottom

B. At sides only

C. Both at bottom and sides

D. Could touch anywhere

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4

An imaginary circle which by pure rolling action gives the same motion as the actual gear, is called

A. Addendum circle

B. Dedendum circle

C. Pitch circle

D. Clearance circle

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4

Spring index is

A. Ratio of coil diameter to wire diameter

B. Load required to produce unit deflection

C. Its capability of storing energy

D. Indication of quality of spring

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4

When the length of the journal is equal to the diameter of the journal, then the bearing is said to be a

A. Short bearing

B. Long bearing

C. Medium bearing

D. Square bearing

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4

According to I.B.R., the distance between the rows of rivets, for equal number of rivets in more than one row for lap joint or butt joint (chain riveting) shall not be less than

A. d

B. 1.5 d

C. 2d

D. 2.5 d

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4

A key made from a cylindrical disc having segmental cross-section, is known as

A. Woodruff key

B. Feather key

C. Flat saddle key

D. Gib head key

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4

Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material.

A. Elastic strength

B. Yield strength

C. Shear strength

D. None of these

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4

In the levers of first type, the mechanical advantage is __________ one.

A. Less than

B. Equal to

C. More than

D. None of these

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4

In a transverse fillet welded joint, the size of weld is __________ the throat of weld.

A. 0.5 times

B. Equal to

C. 2 times

D. Double

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4

The design of the pressure vessel is based on

A. Longitudinal stress

B. Hoop stress

C. Longitudinal and hoop stress

D. None of these

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4

The initial tension (in newtons) in a bolt used for making a fluid tight joint like steam engine cover joints, is calculated by the relation (where d = Nominal diameter of bolt in mm)

A. 1420 d

B. 1680 d

C. 2080 d

D. 2840 d

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4

A special case of ductility which permits materials to be rolled or hammered into thin sheets, is called

A. Plasticity

B. Elasticity

C. Ductility

D. Malleability

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4

The coefficient of friction in belt drive depends upon

A. Material of belt

B. Material of pulley

C. Materials of belt and pulley

D. Belt velocity

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4

A metal pipe of 1 m diameter contains a fluid having a pressure of 1 N/mm². If the permissible tensile stress in the metal is 20 N/mm², then the thickness of the metal required for making the pipe will be

A. 5 mm

B. 10 mm

C. 15 mm

D. 25 mm

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4

According to maximum shear stress theory, the maximum shear stress in the shaft is

A. (1/2) × √(σ² + 4τ²)

B. √(σ² + 4τ²)

C. (1/2) × [σ + √(σ² + 4τ²)]

D. σ + √(σ² + 4τ²)

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4

Buttress threads are usually found on

A. Screw cutting lathes

B. Feed mechanisms

C. Spindles of bench vices

D. Railway carriage couplings

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4

In the levers of third type, the mechanical advantage is __________ one.

A. Less than

B. Equal to

C. More than

D. None of these

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4

The coefficient of friction between the belt and pulley depends upon the

A. Material of belt and pulley

B. Slip of belt

C. Speed of belt

D. All of these

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4

Transverse fillet welded joints are designed for

A. Tensile strength

B. Compressive strength

C. Shear strength

D. Bending strength

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4

According to Indian standard specifications, 100 H6/g5 means that the

A. Basic size is 100 mm

B. Actual size is 100 mm

C. Difference between the actual size and basic size is 100 mm

D. None of the above

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4

Residual stress in materials

A. Acts when external load is applied

B. Becomes zero when external load is removed

C. Is independent of external loads

D. Is always harmful

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4

For longitudinal joint in boilers, the type of joint used is

A. Butt joint with single cover plate

B. Butt joint with double cover plate

C. Lap joint with one ring overlapping the other

D. Any one of the above

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4

The stretching in a belt can be controlled by __________ the stress in the belt.

A. Reducing

B. Increasing

C. Both A and B

D. None of these

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4

The radial distance of a tooth from the pitch circle to the top of the tooth is called

A. Addendum

B. Dedendum

C. Clearance

D. Working depth