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4

The function of a washer is to

A. Provide cushioning effect

B. Provide bearing area

C. Absorb shocks and vibrations

D. Provide smooth surface in place of rough surface

Correct Answer :

B. Provide bearing area


Related Questions

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Multiple threads are used to secure

A. Low efficiency

B. High efficiency

C. High load lifting capacity

D. High mechanical advantage

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4

In testing a material for endurance strength, it is subjected to

A. Static load

B. Dynamic load

C. Impact load

D. Completely reversed load

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4

The suitable material for belt used in flour mill is

A. Leather

B. Rubber

C. Canvas or cotton duck

D. Balata gum

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4

A steel containing 0.8% carbon is known as

A. Eutectoid steel

B. Hypereutectoid steel

C. Hypo-eutectoid steel

D. None of these

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4

The acme threads are usually found on

A. Spindles of bench vices

B. Railway carriage couplings

C. Feed mechanism of machine tools

D. Screw cutting lathes

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4

Slenderness ratio is the ratio of

A. Effective length of column to least radius of gyration of the column

B. Width of column to depth of column

C. Maximum size of column to minimum size of column

D. Effective length of column to width of column

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4

In composite or reverse laid ropes

A. Direction of twist of wires in strands is opposite to the direction of twist of strands

B. Direction of twist of wires and strands are same

C. Wires in two adjacent strands are twisted in opposite direction

D. Wires are not twisted

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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

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

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4

The velocity factor for very accurately cut and ground metallic gears operating at velocities upto __________ are equal to 6/(6 + v).

A. 10 m/s

B. 12.5 m/s

C. 15 m/s

D. 20 m/s

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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 taper on a rectangular sunk key is

A. 1 in 16

B. 1 in 32

C. 1 in 48

D. 1 in 100

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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

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4

Stress concentration is caused due to

A. Variation in properties of material from point to point in a member

B. Pitting at points or areas at which loads on a member are applied

C. Abrupt change of section

D. All of the above

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4

The efficiency of a riveted joint is equal to

A. Pt /P

B. Ps /P

C. Pc /P

D. Least of Pt, Ps and Pc/P

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4

When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as

A. Crown bevel gears

B. Angular bevel gears

C. Mitre gears

D. Internal bevel gears

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4

According to Indian standards, total numbers of fundamental deviations are

A. 10

B. 15

C. 20

D. 25

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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%

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4

A spring is used to

A. Measure forces

B. Apply forces

C. Store energy

D. All of these

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An open coiled helical compression spring 'A' of mean diameter 50 mm is subjected to an axial load W. Another spring 'B' of mean diameter 25 mm is similar to spring 'A' in all respects. The deflection of spring 'B' will be __________ as compared to spring 'A'.

A. One-eighth

B. One-fourth

C. One-half

D. Double

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4

In a journal bearing, the load on the bearing is __________ to the axis of the journal.

A. Parallel

B. Perpendicular

C. Both A and B

D. None of these

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4

The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kt as

A. (Kf + 1)/ (Kt + 1)

B. (Kf - 1)/ (Kt - 1)

C. (Kt + 1)/ (Kf + 1)

D. (Kt - 1)/ (Kf - 1)

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4

In order to remove internal stresses produced by hardening the steel, the process usually adopted is

A. Tempering

B. Normalising

C. Annealing

D. Spheroidising

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4

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

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

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

C. Resists fracture due to high impact loads

D. Retain deformation produced under load permanently

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4

Which of the following statement is wrong?

A. The V-belt may be operated in either direction with tight side of the belt at the top or bottom

B. The V-belt drive is used with large centre distance

C. The power transmitted by V-belts is less than flat belts for the same coefficient of friction, arc of contact and allowable tension in the belts

D. The ratio of driving tensions in V-belt drive is more than flat belt drives

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4

The ball bearings are, usually, made from

A. Low carbon steel

B. High carbon steel

C. Medium carbon steel

D. High speed steel

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4

Creep in belt is due to

A. Material of the belt

B. Material of the pulley

C. Uneven extensions and contractions due to varying tension

D. All of the above

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4

The permissible stress in the fillet weld is 100 N/mm². The fillet weld has equal leg lengths of 15 mm each. The allowable shearing load on the weldment per cm length of the weld is

A. 7.5 kN

B. 10.6 kN

C. 15 kN

D. 22.5 kN

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4

Eulers formula for a mild steel column is not valid if the slenderness ratio is

A. 90

B. 60

C. 120

D. 100

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4

The velocity factor for ordinary cut gears operating at velocities upto 12.5 m/s is equal to

A. 0.75/ (0.75 + √v)

B. 3/ (3 + v)

C. 4.5/ (4.5 + v)

D. 6/ (6 + v)