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4

Yield point in fatigue loading as compared to static loading is

A. Same

B. Higher

C. Lower

D. Depends on other factors

Correct Answer :

C. Lower


Related Questions

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4

The velocity factor for ordinary cut gears operating at velocities upto 12.5 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

If the centre distance of the mating gears having involute teeth is varied within limits, the velocity ratio.

A. Increases

B. Decreases

C. Remains unchanged

D. None of these

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4

According to I.B.R., the factor of safety of riveted joint should not be less than

A. 1

B. 2

C. 3

D. 4

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4

When a close coiled helical spring is compressed, its wire is subjected to

A. Tension

B. Shear

C. Compression

D. All of the above

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4

The maximum efficiency of a square threaded screw is

A. (1 - sinφ)/ (1 + sinφ)

B. (1 + sinφ)/ (1 - sinφ)

C. (1 - sinφ)/ (1 + cosφ)

D. (1 + cosφ)/ (1 - sinφ)

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4

Rankine's theory of failure is applicable for following type of materials

A. Brittle

B. Ductile

C. Elastic

D. Plastic

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4

I.S. specifies following total number of grades of tolerances

A. 18

B. 16

C. 20

D. 22

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4

The piston rod of a steam engine is usually connected to the crosshead by means of

A. Bolted joint

B. Knuckle joint

C. Cotter joint

D. Universal joint

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4

In thrust bearings, the load acts

A. Along the axis of rotation

B. Parallel to the axis of rotation

C. Perpendicular to the axis of rotation

D. In any direction

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4

Which one of the following loading is considered for the design of axles?

A. Bending moment only

B. Twisting moment only

C. Combined bending moment and twisting moments

D. Combined action of bending moment, twisting moment and axial thrust

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4

Oil in journal bearing should be applied at the point where load is

A. Nil or lightest

B. Maximum

C. Average

D. Any one of the above

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4

A connecting rod is designed as a

A. Long column

B. Short column

C. Strut

D. All of these

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4

The acme threads are usually found on

A. Spindles of bench vices

B. Railway carriage couplings

C. Feed mechanism of machine tools

D. Screw cutting lathes

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4

A connecting rod subjected to an axial load may buckle with

A. X-axis as neutral axis

B. Y-axis as neutral axis

C. X-axis or Y-axis as neutral axis

D. Z-axis

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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 of the following has threads at both ends?

A. Bolt

B. Tap bolt

C. Stud

D. None of these

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4

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

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

Which of the following property is essential for spring materials?

A. Stiffness

B. Ductility

C. Resilience

D. Plasticity

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4

In a flange coupling, the bolts are subjected to

A. Tensile stress

B. Compressive stress

C. Shear stress

D. None of these

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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

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

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

When a circular beam of diameter d is subjected to a shear force F, the maximum shear stress induced will be

A. 4F/ πd²

B. 6F/ πd²

C. 8F/ πd²

D. 16F/ 3πd²

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4

The connecting rod bolts are tightened up with initial tension greater than the external load so that

A. Joint may not open up

B. Bolts are weakest elements

C. The resultant load on the bolt would not be affected by the external cyclic load

D. Bolts will not loosen during service

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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 expansion joint is mostly used for pipes which carry steam at __________ pressures.

A. Low

B. High

C. Medium

D. None of these

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4

The notch angle of the Izod impact test specimen is

A. 10°

B. 20°

C. 30°

D. 45°

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4

Idler pulley is used for

A. Increasing velocity ratio

B. For applying tension

C. Changing the direction of motion of belt

D. All of these

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4

A spring of stiffness 1000 N/m is stretched initially by 100 mm from the undeformed position. The work required to stretch it by another 100 mm is

A. 5 N-m

B. 7 N-m

C. 10 N-m

D. 15 N-m