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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

Correct Answer :

C. 2d


Related Questions

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4

In nitrated parts, the origins of the fatigue cracks will occur at

A. Surface

B. Just below the surface

C. Within the core

D. None of the above

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4

The ratio of driving tensions in V-belt drives is __________ flat belt drives.

A. Equal to

B. sinα times more than

C. sinα times less than

D. cosecα times more than

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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

When an open coiled helical compression spring is subjected to an axial load (W), the compression produced in the spring will be (where n = No. of active turns of the spring, and G = Modulus of rigidity for the spring material)

A. 2WD3n/Gd⁴

B. 4WD3n/Gd⁴

C. 8WD3n/Gd⁴

D. 16WD3n/Gd⁴

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4

When two nonintersecting and non-coplanar shafts are connected by gears, the arrangement is known as

A. Spur gearing

B. Helical gearing

C. Bevel gearing

D. Spiral gearing

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4

Basic hole is one

A. Whose upper deviation is zero

B. Whose lower deviation is zero

C. Whose lower as well as upper deviations are zero

D. Does not exist

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4

The permissible stress for carbon steel under static loading is generally taken as

A. 2000-3000 kg/m²

B. 3000-4000 kg/cm²

C. 4000-4500 kg/cm²

D. 7500-10,000 kg/cm²

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4

The resultant axial load on a bolt depends upon

A. External load applied

B. Initial tension due to tightening of the bolt

C. Relative elastic yielding of the bolt and the connected members

D. All of the above

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4

A type of brake commonly used in motor cars is a

A. Shoe brake

B. Band and block brake

C. Band brake

D. Internal expanding brake

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4

An elastic bar is fixed at the upper end and loaded at the lower end by a falling weight. The shock load produced can be reduced by

A. Increasing the length of bar

B. Decreasing the cross-sectional area of the bar

C. Decreasing the modulus of elasticity of the bar

D. All of the above

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4

Whether any core is required in wire ropes

A. Yes

B. No

C. Sometimes

D. Rarely

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4

In hydrostatic bearings

A. The Oil film pressure is generated only by the rotation of the journal

B. The oil film is maintained by supplying oil under pressure

C. Do not require external supply of lubricant

D. Grease is used for lubrication

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4

In designing a connecting rod, it is considered like __________ for buckling about Y-axis.

A. Both ends hinged

B. Both ends fixed

C. One end fixed and the other end hinged

D. One end fixed and the other end free

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4

The load cup of a screw jack is made separate from the head of the spindle to

A. Prevent the rotation of load being lifted

B. Enhance the load carrying capacity of the jack

C. Reduce the effort needed for lifting the working load

D. Reduce the value of frictional torque

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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

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4

When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be _________ the bearing modulus.

A. 10 times

B. 5 times

C. 15 times

D. 20 times

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4

If T₁ and T₂ are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to

A. T₁ - T₂ + Tc

B. T₁ + T₂ + Tc

C. (T₁ - T₂ + Tc)/2

D. (T₁ + T₂ + Tc)/2

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4

If the size of a standard specimen for a fatigue testing machine is increased, the endurance limit for the material will

A. Have same value as that of standard specimen

B. Increase

C. Decrease

D. None of these

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4

In radial cams, the follower moves

A. In a direction parallel to the cam axis

B. In a direction perpendicular to the cam axis

C. In any direction irrespective of cam axis

D. Along the cam axis

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4

The pitch of threads on a Jock nut in comparison to pitch of nut is

A. Same

B. Coarser

C. Finer

D. Very fine

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4

When bevel gears having equal teeth and equal pitch angles connect two shafts whose axes intersect at right angle, then they are known as

A. Angular bevel gears

B. Crown bevel gears

C. Internal bevel gears

D. Mitre gears

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4

The maximum bending stress in a curved beam having symmetrical section always occur at the

A. Centroidal axis

B. Neutral axis

C. Inside fibre

D. Outside fibre

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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

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4

The product of the diametral pitch and circular pitch is equal to

A. 1

B. 1/π

C. π

D. π × number of teeth

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4

The shock absorbing capacity of a bolt may be increased by

A. Increasing its shank diameter

B. Decreasing its shank diameter

C. Tightening the bolt properly

D. Making the shank diameter equal to core diameter of thread

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4

Oldham coupling is used to connect two shafts

A. Which are perfectly aligned

B. Which are not in exact alignment

C. Which have lateral misalignment

D. Whose axes intersect at a small angle

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4

The circumferential and longitudinal strains in a cylindrical boiler under internal steam pressure are εc and εl respectively. The change in volume of the boiler cylinder per unit volume will be

A. εc + 2εl

B. c + εl

C. εc + εl²

D. εc² + εl

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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 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

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4

Which is correct statement?

A. A member made of steel will generally be more rigid than a member of equal load carrying ability made of cast iron

B. A member made of cast iron will generally be more rigid than a member of equal load carrying ability made of steel

C. Both will be equally rigid

D. Which one is rigid will depend on several other factors