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4

According to I.B.R., shearing resistance required to shear off the rivet per pitch length (in double shear) is (where n = Number of rivets per pitch length)

A. (π/4) d² × τ × n

B. 1.875 × (π/4) d² × τ × n

C. 2 × (π/4) d² × τ × n

D. 3 × (π/4) d² × τ × n

Correct Answer :

B. 1.875 × (π/4) d² × τ × n


Related Questions

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4

If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to

A. Diameter of bolt

B. 0.75 × diameter of bolt

C. 1.25 × diameter of bolt

D. 1.5 × diameter of bolt

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4

In designing thick cylinders, the equation used is

A. Lame's equation

B. Birnie's equation

C. Clavarinos' equation

D. All of these

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4

When an open coiled helical compression spring is subjected to an axial compressive load, the stress induced in the wire is

A. Tensile stress

B. Compressive stress

C. Shear stress

D. Bending stress

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4

The expression 0.175 - 0.841/T is the Lewis form factor for

A. 14 ½° composite and full depth involute system

B. 20° full depth involute system

C. 20° stub system

D. None of the above

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4

The minimum number of teeth on the pinion which will mesh with any gear without interference for 20° full depth involute teeth will be

A. 12

B. 14

C. 18

D. 24

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4

The constant factor in case of R10 series of preferred numbers is

A. 1.06

B. 1.12

C. 1.26

D. 1.58

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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

A V-belt designated as B 4430 LP has

A. 4430 mm as diameter of small pulley

B. 4430 mm as nominal pitch length

C. 4430 mm as diameter of large pulley

D. 4430 mm as centre distance between pulleys

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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

The cross-section of the arm of a bell crank lever is

A. Rectangular

B. Elliptical

C. I-section

D. Any one of these

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4

A crankshaft is a __________ shaft.

A. Transmission

B. Machine

C. Machine frame

D. None of these

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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

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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

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

The shock resistance of steel is increased by adding

A. Nickel

B. Chromium

C. Nickel and chromium

D. Cobalt and molybdenum

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4

The stiffness of a closely coiled helical spring subjected to an axial load W is equal to (where G = Modulus of rigidity, and n = Number of active coils)

A. Gd⁴/ 8D3n

B. Gd3/ 8D3n

C. Gd⁴/ 4D3n

D. Gd⁴/ 8D²n

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4

When a nut is tightened by placing a washer below it, the bolt will be subjected to following type of loads

A. Compression

B. Tension

C. Shear

D. Combined loads

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4

In levers, leverage is the ratio of

A. Load lifted to the effort applied

B. Mechanical advantage to the velocity ratio

C. Load arm to the effort arm

D. Effort arm to the load arm

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4

A single strap butt joint is always in __________ shear.

A. Single

B. Double

C. Triple share

D. None of these

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4

Which of the following statement is correct for gears?

A. The pitch circle diameter is equal to the product of module and number of teeth

B. The addendum is less than dedendum

C. The pitch circle is always greater than the base circle

D. All of the above

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4

A bolt of M 24 × 2 means that

A. The pitch of the thread is 24 mm and depth is 2 mm

B. Cross-sectional area of the threads is 24 mm²

C. The nominal diameter of bolt is 24 mm and pitch is 2 mm

D. The effective diameter of bolt is 24 mm and there are 2 threads per cm

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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 maximum shear stress theory is used for

A. Brittle materials

B. Ductile materials

C. Plastic materials

D. Nonferrous materials

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4

Which of the following screw thread is adopted for power transmission in either direction?

A. Acme threads

B. Square threads

C. Buttress threads

D. Multiple threads

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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

A connecting rod should be

A. Strong in buckling about X-axis

B. Strong in buckling about Y-axis

C. Equally strong in buckling about X-axis and Y-axis

D. Any one of the above

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4

The belt slip occurs due to

A. Heavy load

B. Loose belt

C. Driving pulley too small

D. Any one of the above

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4

Lewis equation in gears is used to find the

A. Tensile stress in bending

B. Shear stress

C. Compressive stress in bending

D. Fatigue stress

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4

For a square key made of mild steel, the shear and crushing strength are related as

A. Shear strength is equal to crushing strength

B. Shear strength is greater than crushing strength

C. Shear strength is less than crushing strength

D. None of the above

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4

Which of the following material has the maximum ductility?

A. Copper

B. Mild steel

C. Aluminium

D. Zinc