Home
Current Affairs January 2024

What is the correct answer?

4

In a flange coupling, the bolts are subjected to

A. Tensile stress

B. Compressive stress

C. Shear stress

D. None of these

Correct Answer :

C. Shear stress


Related Questions

What is the correct answer?

4

Two shafts will have equal strength, if

A. Diameter of both the shafts is same

B. Angle of twist of both the shafts is same

C. Material of both the shafts is same

D. Twisting moment of both the shafts is same

What is the correct answer?

4

According to Indian standards, total numbers of fundamental deviations are

A. 10

B. 15

C. 20

D. 25

What is the correct answer?

4

If two springs are in parallel then their overall stiffness will be

A. Half

B. Same

C. Double

D. None of the above

What is the correct answer?

4

In V-belt drive, belt touches

A. At bottom

B. At sides only

C. Both at bottom and sides

D. Could touch anywhere

What is the correct answer?

4

If P1 and P2 are the tight and slack side tensions in the belt, then the initial tension Pi (according to Barth) will be equal to

A. [(√P1 + √P2)/2]²

B. P1 + P2

C. 2 × (P1 + P2)

D. [2 × (P1 + P2)] + Pc Where Pc is centrifugal tension

What is the correct answer?

4

Two shafts A and B under pure torsion are of identical length and identical weight and are made of the same material. The shaft A is solid and the shaft B is hollow. We can say that

A. Shaft B is better than shaft A

B. Shaft A is better than shaft B

C. Both the shafts are equally good

D. None of these

What is the correct answer?

4

A special case of ductility which permits materials to be rolled or hammered into thin sheets, is called

A. Plasticity

B. Elasticity

C. Ductility

D. Malleability

What is the correct answer?

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

What is the correct answer?

4

Stress concentration factor is defined as the ratio of

A. Maximum stress to the endurance limit

B. Nominal stress to the endurance limit

C. Maximum stress to the nominal stress

D. Nominal stress to the maximum stress

What is the correct answer?

4

The arms of the pulleys for flat belt drive have

A. Elliptical cross-section

B. Major axis in plane of rotation

C. Major axis twice the minor axis

D. All the three characteristics

What is the correct answer?

4

A single strap butt joint is always in __________ shear.

A. Single

B. Double

C. Triple share

D. None of these

What is the correct answer?

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

What is the correct answer?

4

An imaginary circle which by pure rolling action gives the same motion as the actual gear, is called

A. Addendum circle

B. Dedendum circle

C. Pitch circle

D. Clearance circle

What is the correct answer?

4

Aircraft body is usually fabricated by

A. Welding

B. Pre-casting

C. Riveting

D. Casting

What is the correct answer?

4

In second type of levers,

A. Load is in between the fulcrum and effort

B. Effort is in between the fulcrum and load

C. Fulcrum is in between the load and effort

D. None of these

What is the correct answer?

4

The pitch diameter is the __________ diameter of an external or internal screw thread.

A. Effective

B. Smallest

C. Largest

D. None of these

What is the correct answer?

4

If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to

A. 0.2

B. 0.25

C. 0.50

D. 0.6

What is the correct answer?

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

What is the correct answer?

4

The belt slip occurs due to

A. Heavy load

B. Loose belt

C. Driving pulley too small

D. Any one of the above

What is the correct answer?

4

In skew bevel gearing, the axes of shafts are

A. Intersecting and the teeth are curved

B. Non-intersecting and nonparallel and the teeth are curved

C. Non-intersecting and non-parallel and the teeth are straight

D. None of the above

What is the correct answer?

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)

What is the correct answer?

4

The number of slots in a 25 mm castle nut is

A. 8

B. 6

C. 4

D. 2

What is the correct answer?

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

What is the correct answer?

4

Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole, and σt = Permissible tensile stress for plate material)

A. p.d.σt

B. p.t.σt

C. (p - d) σt

D. (p - d) t.σt

What is the correct answer?

4

When the connected members are very yielding (soft gasket) as compared to the bolt, then the resultant load on the bolt will be equal to the

A. Initial tension

B. External load applied

C. Sum of the initial tension and external load applied

D. Initial tension or external load, whichever is greater

What is the correct answer?

4

The included angle in unified of American National threads is

A. 60°

B. 55°

C. 47°

D. 29°

What is the correct answer?

4

The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by (where T = Number of teeth on the sprocket)

A. p = D sin (90°/T)

B. p = D sin (120°/T)

C. p = D sin (180°/T)

D. p = D sin (360°/T)

What is the correct answer?

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

What is the correct answer?

4

The shear stress at a point in a shaft subjected to a torque is

A. Directly proportional to the polar moment of inertia and to the distance of the point from the axis

B. Directly proportional to the applied torque and inversely proportional to the polar moment of inertia

C. Directly proportional to the applied torque and the polar moment of inertia

D. Inversely proportional to the applied torque and the polar moment of inertia

What is the correct answer?

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