Home
Current Affairs January 2024

What is the correct answer?

4

Fabric belts are used in industrial applications because

A. They are cheap

B. They can work at high temperature

C. They are unaffected by moisture and humidity

D. None of the above

Correct Answer :

A. They are cheap


Related Questions

What is the correct answer?

4

Buttress threads are usually found on

A. Screw cutting lathes

B. Feed mechanisms

C. Spindles of bench vices

D. Railway carriage couplings

What is the correct answer?

4

In case of thick cylinders, the tangential stress across the thickness of cylinder is

A. Maximum at the outer surface and minimum at the inner surface

B. Maximum at the inner surface and minimum at the outer surface

C. Maximum at the inner surface and zero at the outer surface

D. Maximum at the outer surface and zero at the inner surface

What is the correct answer?

4

The cold working of metals is carried out __________ the recrystallisation temperature.

A. Above

B. Below

C. At

D. None of these

What is the correct answer?

4

The building up of worn and undersized parts, subjected to repeated loads by electroplating is

A. Best method

B. Extremely hazardous

C. Has no effect as regards fatigue strength

D. Cheapest method

What is the correct answer?

4

The design of shafts made of brittle materials is based on

A. Guest's theory

B. Rankine's theory

C. St Venant's theory

D. Von Mises theory

What is the correct answer?

4

The sleeve or muff coupling is designed as a

A. Dun cylinder

B. Hollow shaft

C. Solid shaft

D. Thick cylinder

What is the correct answer?

4

When a circular beam of diameter d is subjected to a shear force F, the maximum shear stress induced will be

A. 4F/ πd²

B. 6F/ πd²

C. 8F/ πd²

D. 16F/ 3πd²

What is the correct answer?

4

The stress in the threaded part of the bolt will be __________ as compared to the shank.

A. Same

B. Higher

C. Lower

D. None of these

What is the correct answer?

4

A machine part subjected to __________ is called a strut.

A. An axial compressive force

B. A tangential force

C. An axial tensile force

D. Any one of these

What is the correct answer?

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

What is the correct answer?

4

In worm, gears, pitch lead angle is

A. Half the angle between two inclined faces in axial plane

B. The angle between the tangent to the pitch helix and the plane of rotation

C. The angle between the tangent to the pitch helix and an element of the cylinder

D. None of the above

What is the correct answer?

4

Which of the following statement is correct?

A. A parallel sunk key is a taperless key

B. A parallel sunk key may be rectangular or square in cross-section

C. A flat saddle key is a taper key which fits in a key way of the hub and is flat on the shaft

D. All of the above

What is the correct answer?

4

Whether any core is required in wire ropes

A. Yes

B. No

C. Sometimes

D. Rarely

What is the correct answer?

4

Factor of safety for fatigue loading is the ratio of

A. Elastic limit to the working stress

B. Elastic limit to the yield point

C. Endurance limit to the working stress

D. Young's modulus to the ultimate tensile strength

What is the correct answer?

4

The distribution of the forces along the length of key fitted in a shaft

A. Varies linearly

B. Is uniform throughout

C. Varies exponentially, being more near the torque-input end

D. Varies exponentially, being less near the torque-input end

What is the correct answer?

4

When two helical springs of equal lengths are arranged to form a cluster spring, then

A. Shear stress in each spring will be equal

B. Load taken by each spring will be half the total load

C. Only A is correct

D. Both A and B is correct

What is the correct answer?

4

The washer is generally specified by its

A. Outer diameter

B. Hole diameter

C. Thickness

D. Mean diameter

What is the correct answer?

4

The taper on a rectangular sunk key is

A. 1 in 16

B. 1 in 32

C. 1 in 48

D. 1 in 100

What is the correct answer?

4

In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by

A. Decreasing the cross-section area of bar

B. Increasing the cross-section area of bar

C. Remain unaffected with cross-section area

D. Would depend upon other factors

What is the correct answer?

4

Which of the following statement is wrong?

A. A key is used as a temporary fastening

B. A key is subjected to tensile stresses

C. A key is always inserted parallel to the axis of the shaft

D. A key prevents relative motion between the shaft and boss of the pulley

What is the correct answer?

4

The spring mostly used in gramophones is

A. Helical spring

B. Conical spring

C. Flat spiral spring

D. Volute spring

What is the correct answer?

4

The toughness of a material _________ when it is heated

A. Does not change

B. Increases

C. Decreases

D. None of the Above

What is the correct answer?

4

For a shaft diameter of 100 mm, the number of bolts in a flange coupling should be

A. 4

B. 6

C. 8

D. 10

What is the correct answer?

4

The objective of idler pulley in belt drive is to

A. Decrease the tendency of belt to slip

B. Increase the power transmission capacity

C. Increase the wrap angle and belt tension

D. All the above objectives

What is the correct answer?

4

The shear plane in case of bolts should

A. Be across threaded portion of shank

B. Be parallel to axis of bolt

C. Be normal to threaded portion of shank

D. Never be across the threaded portion

What is the correct answer?

4

Rankine's theory of failure is applicable for following type of materials

A. Brittle

B. Ductile

C. Elastic

D. Plastic

What is the correct answer?

4

The plasticity is the property of a material which enables it to

A. Regain its original shape after deformation when the external forces are removed

B. Draw into wires by the application of a tensile force

C. Resist fracture due to high impact loads

D. Retain deformation produced under load permanently

What is the correct answer?

4

In skew bevel gearing, the axes of shafts are

A. Intersecting and the teeth are curved

B. Non-intersecting and nonparallel and the teeth are curved

C. Non-intersecting and non-parallel and the teeth are straight

D. None of the above

What is the correct answer?

4

Which of the following screw thread is used for power transmission in one direction only?

A. Square threads

B. Multiple threads

C. Acme threads

D. Buttress threads

What is the correct answer?

4

A screw is said to be over hauling screw, if the

A. Friction angle is less than helix angle

B. Friction angle is more than helix angle

C. Friction angle is equal to helix angle

D. Efficiency of screw is 100%