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4

The designation M 33 × 2 of a bolt means

A. Metric threads of 33 numbers in 2 cm

B. Metric threads with cross-section of 33 mm

C. Metric threads of 33 mm outside diameter and 2 mm pitch

D. Bolt of 33 mm nominal diameter having 2 threads per cm

Correct Answer :

C. Metric threads of 33 mm outside diameter and 2 mm pitch


Related Questions

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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

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4

The process which improves the machinability of steels, but lowers the hardness and tensile strength is

A. Normalising

B. Full annealing

C. Process annealing

D. Spheroidising

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4

The face of the tooth is the

A. Surface of the top of the tooth

B. Surface of the tooth above the pitch surface

C. Surface of the tooth below the pitch surface

D. Width of the tooth measured along the pitch circle

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4

In a marine flange coupling, the thickness of flange is taken as

A. d/2

B. d/3

C. 3d/4

D. d/4

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4

According to Unwin's formula, the relation between the diameter of rivet hole (d) and the thickness of plate (t) is given by (where d and t are in mm)

A. d = t

B. d = 1.6 t

C. d = 2t

D. d = 6t

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4

A thin spherical shell of internal diameter d is subjected to an internal pressure p. If V is the storage capacity of shell, then its diameter will be

A. (6V/ π)1/2

B. (6V/ π)1/3

C. (6V/ π)2

D. (6V/ π)3

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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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4

A backing ring is used inside the pipe joint when making a

A. Butt weld

B. Fillet weld

C. Sleeve weld

D. Socket weld

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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

A tapered key which fits in a key-way in the hub and is flat on the shaft, is known as

A. Woodruff key

B. Feather key

C. Flat saddle key

D. Gib head key

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4

The centre distance between two meshing involute gears is equal to

A. (Sum of base circle radii)/cosφ

B. (Difference of base circle radii)/cosφ

C. (Sum of pitch circle radii)/cosφ

D. (Difference of pitch circle radii)/cosφ

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4

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

A. Above

B. Below

C. At

D. None of these

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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 shear stress at a point in a shaft subjected to a torque is

A. Directly proportional to the polar moment of inertia and to the distance of the point from the axis

B. Directly proportional to the applied torque and inversely proportional to the polar moment of inertia

C. Directly proportional to the applied torque and the polar moment of inertia

D. Inversely proportional to the applied torque and the polar moment of inertia

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4

Rivets are generally specified by

A. Thickness of plates to be riveted

B. Length of rivet

C. Diameter of head

D. Nominal diameter

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4

The taper on cotter varies from

A. 1 in 24 to 1 in 20

B. 1 in 15 to 1 in 10

C. 1 in 32 to 1 in 24

D. 1 in 48 to 1 in 24

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4

According to Indian standards, total numbers of tolerance grades are

A. 8

B. 12

C. 18

D. 20

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4

The backlash for spur gears depends upon

A. Module

B. Tooth profile

C. Both module and pitch line velocity

D. Pitch line velocity

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4

Pick up wrong statement. Fatigue strength can be increased by

A. Cold working

B. Shot peening

C. Grinding and lapping surface

D. Hot working

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4

The number of slots in a 25 mm castle nut is

A. 8

B. 6

C. 4

D. 2

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4

Belt slip may occur due to

A. Heavy load

B. Loose belt

C. Driving pulley too small

D. All of the above

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4

If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to

A. 0.2

B. 0.25

C. 0.50

D. 0.6

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4

Which of the following key is preferred for the condition when a large amount of impact type torque is to be transmitted in both direction of rotation?

A. Woodruff key

B. Feather key

C. Gib-head key

D. Tangent key

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4

The property of a material which enables it to be drawn into wires with the application of a tensile force, is called

A. Plasticity

B. Elasticity

C. Ductility

D. Malleability

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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

For a shoe brake, the equivalent coefficient of friction is equal to (where μ = Actual coefficient of friction, and θ = Semi-block angle)

A. 2μ sinθ/(θ + sinθ)

B. μ sinθ/(2θ + sin 2θ)

C. 4μ sinθ/(θ + sinθ)

D. 4μ sinθ/(2θ + sin 2θ)

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4

The metal suitable for bearings subjected to heavy loads is

A. White metal

B. Silicon bronze

C. Monel metal

D. Phosphor bronze

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4

The design of pin of a rocker arm of an I.C. engine is based on

A. Bearing failure

B. Shearing failure

C. Bending failure

D. All of these

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4

The velocity factor for precision metallic gears cut with high accuracy and operating at velocities upto 20 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)

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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