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4

A tap bolt

A. Has a head on one end and a nut fitted to the other

B. Has head at one end and other end fits into a tapped hole in the other part to be joined

C. Has both the ends threaded

D. Has pointed threads

Correct Answer :

B. Has head at one end and other end fits into a tapped hole in the other part to be joined


Related Questions

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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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Yield point in fatigue loading as compared to static loading is

A. Same

B. Higher

C. Lower

D. Depends on other factors

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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

A single strap butt joint is always in __________ shear.

A. Single

B. Double

C. Triple share

D. None of these

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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

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4

According to I.B.R., the efficiency of a double riveted butt joint with double cover straps of equal width should be

A. 45 to 60 %

B. 63 to 70 %

C. 70 to 83 %

D. 80 to 90 %

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4

Stress concentration is caused due to

A. Variations in load acting on a member

B. Variations in properties of materials in a member

C. Abrupt change of cross-section

D. All of these

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When a hole of diameter d is punched in a metal of thickness 't', then the force required to punch a hole is equal to (where τu = Ultimate shear strength of the material of the plate)

A. d.t.τu

B. πd.t.τu

C. π/4 × d².τu

D. π/4 × d² × t.τu

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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 modulus of elasticity for mild steel is approximately equal to

A. 80 kN/mm²

B. 100 kN/mm²

C. 110 kN/mm²

D. 210 kN/mm²

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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

Which of the following statement is wrong for a connecting rod?

A. The connecting rod will be equally strong in buckling about X-axis and Y-axis, if Ixx = 4 Iyy

B. If Ixx > 4 Iyy, the buckling will occur about Y-axis

C. If Ixx < 4 Iyy, the buckling will occur about X-axis

D. The most suitable section for the connecting rod is T-section

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4

If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value?

A. Maximum principal stress theory

B. Maximum shear stress theory

C. Maximum strain energy theory

D. Maximum distortion energy theory

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4

When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at the

A. Thread

B. Middle

C. Shank

D. Head

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In a flange coupling, the flanges are coupled together by means of

A. Bolts and nuts

B. Studs

C. Headless taper bolts

D. None of these

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4

Three different weights fall from a certain height under vacuum. They will take

A. Same time to reach earth

B. Times proportional to weight to reach earth

C. Times inversely proportional to weight to reach earth

D. None of the above

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4

The largest diameter of an external or internal screw thread is known as

A. Minor diameter

B. Major diameter

C. Pitch diameter

D. None of these

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For general industrial machinery, the ratio of the length of journal to its diameter is taken as

A. 0.5 to 1

B. 1 to 2

C. 3 to 5

D. 5 to 10

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A locking device extensively used in marine type connecting rod ends is a

A. Jam nut

B. Castle nut

C. Sawn nut

D. Ring nut

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4

The objective of crowning of the flat pulleys of belt drive is to

A. Prevent the belt from running off the pulley

B. Increase the power transmission capacity

C. Increase the belt velocity

D. Prevent the belt joint from damaging the belt surface

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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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The endurance limit in shear of carbon steel can be obtained by multiplying the endurance limit in flexure by a factor of

A. 0.45

B. 0.55

C. 0.65

D. 0.75

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4

The contact ratio for gears is

A. Zero

B. Less than one

C. Greater than one

D. None of these

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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 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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In hydrodynamic 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

The period during which the cam follower remains at rest, when cam moves, is known as

A. Constant period

B. Fixed period

C. Dwell period

D. Idle period

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4

A chain drive transmits __________ power as compared to belt drive.

A. More

B. Less

C. Same

D. None of these

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The centrifugal tension in belts

A. Decreases the power transmitted

B. Increases the power transmitted

C. Increase the wrap angle

D. Increases the belt tension without increasing power transmission

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4

The contact ratio is the ratio of

A. Length of arc of recess to the circular pitch

B. Length of path of contact to the circular pitch

C. Length of arc of contact to the circular pitch

D. Length of arc of approach to the circular pitch