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4

The resultant axial load on a bolt depends on

A. Initial tension

B. External load applied

C. Relative elastic yielding (springness) of the bolt and the connected member

D. All of the above

Correct Answer :

D. All of the above


Related Questions

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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

A column of length l is fixed at both ends. The equivalent length of the column is

A. l/2

B. l/√2

C. l

D. 2 l

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4

In designing a flange coupling, the pitch circle diameter of bolts is taken as (where d = Diameter of the shaft)

A. 2d

B. 3d

C. 4d

D. 5d

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4

In the levers of third type, the mechanical advantage is __________ one.

A. Less than

B. Equal to

C. More than

D. None of these

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4

The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to an internal pressure is

A. ½

B. 1

C. 2

D. 4

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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 process extensively used for making bolts and nuts is

A. Hot piercing

B. Extrusion

C. Cold peening

D. Cold heading

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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 size of a gear is usually specified by

A. Pressure angle

B. Pitch circle diameter

C. Circular pitch

D. Diametral pitch

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4

The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to

A. Static load

B. Dynamic load

C. Static as well as dynamic load

D. Completely reversed load

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4

In leaf springs, the longest leaf is known as

A. Master leaf

B. Lower leaf

C. Upper leaf

D. None of these

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4

If d is the normal diameter of a bolt in mm, then the initial tension in kg in a bolt used for making a fluid tight joint as for steam engine cover joint is calculated by the relation

A. 124 d

B. 138 d

C. 151 d

D. 168 d

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4

The resilience of a bolt may be increased by

A. Increasing its shank diameter

B. Increasing its length

C. Decreasing its shank diameter

D. Decreasing its length

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4

Two helical springs of the same material and of equal circular crosssection, length and number of turns, but having radii 80 mm and 40 mm, kept concentrically (smaller radius spring within the larger radius spring), are compressed between two parallel planes with a load W. The inner spring will carry a load equal to

A. W/2

B. 2W/3

C. W/9

D. 8W/9

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4

A steel containing __________ 0.8% carbon is known as hypoeutectoid steel.

A. Equal to

B. Less than

C. Greater than

D. None of these

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4

In a transverse fillet welded joint, the size of weld is __________ the throat of weld.

A. 0.5 times

B. Equal to

C. 2 times

D. Double

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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 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

Tapered roller bearings can take

A. Axial load only

B. Both radial and axial loads and the ratio of these being greater than unity

C. Radial load only

D. Both radial and axial loads and the ratio of these being less than unity

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4

The function of cutting oil when threading a pipe is to

A. Provide cooling action

B. Lubricate the dies

C. Help removes chips

D. All of the above

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4

Crushing resistance required to crush the rivet per pitch length is

A. p.d.σc

B. p.t.σc

C. n.d.t.σc

D. (p - d) t.σc

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4

The number of slots in a 25 mm castle nut is

A. 8

B. 4

C. 2

D. 6

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4

Which of the following material has the maximum ductility?

A. Copper

B. Mild steel

C. Aluminium

D. Zinc

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4

The tension on the slack side of the belt is __________ the tension on the tight side of the belt.

A. Equal to

B. Less than

C. Greater than

D. None of these

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4

When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring)

A. (WD/ πd3) × K

B. (2WD/ πd3) × K

C. (4WD/ πd3) × K

D. (8WD/ πd3) × K

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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

The allowable static stress for steel gears is approximately __________ of the ultimate tensile stress.

A. One-fourth

B. One-third

C. One-half

D. Double

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4

Resistance to fatigue of a material is measured by

A. Young's modulus

B. Coefficient of elasticity

C. Elastic limit

D. Endurance limit

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4

A coupling used to connect two perfectly aligned shafts, is

A. Muff coupling

B. Compression coupling

C. Flange coupling

D. All of these

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4

The value of Lewis form factor used in design of gears is

A. Dependent on number of teeth of a gear

B. Dependent on system of teeth

C. Independent of size of teeth

D. All of these