Home
Current Affairs January 2024

What is the correct answer?

4

The stretching in a belt can be controlled by __________ the stress in the belt.

A. Reducing

B. Increasing

C. Both A and B

D. None of these

Correct Answer :

A. Reducing


Related Questions

What is the correct answer?

4

Tensile strength of a mild steel specimen can be roughly predicted from following hardness test

A. Brinell

B. Rockwell

C. Vickers

D. None of the above

What is the correct answer?

4

The shear plane in case of bolts should

A. Be across threaded portion of shank

B. Be parallel to axis of bolt

C. Be normal to threaded portion of shank

D. Never be across the threaded portion

What is the correct answer?

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

What is the correct answer?

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

What is the correct answer?

4

Which of the following statement is correct regarding power screws?

A. The efficiency of a self locking screw can not be more than 50%

B. The efficiency of Acme (trapezoidal) thread is less than that of a square thread

C. If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50%

D. (A) and (B) Only

What is the correct answer?

4

The ball bearings are provided with a cage

A. To reduce friction

B. To facilitate slipping of balls

C. To prevent the lubricant from flowing out

D. To maintain the balls at a fixed distance apart

What is the correct answer?

4

A circular shaft can transmit a torque of 5 kN-m. If the torque is reduced to 4 kN-m, then the maximum value of bending moment that can be applied to the shaft is

A. 1 kN-m

B. 2 kN-m

C. 3 kN-m

D. 4 kN-m

What is the correct answer?

4

The centre distance between two meshing involute gears is equal to

A. (Sum of base circle radii)/cosφ

B. (Difference of base circle radii)/cosφ

C. (Sum of pitch circle radii)/cosφ

D. (Difference of pitch circle radii)/cosφ

What is the correct answer?

4

For a square key made of mild steel, the shear and crushing strength are related as

A. Shear strength is equal to crushing strength

B. Shear strength is greater than crushing strength

C. Shear strength is less than crushing strength

D. None of the above

What is the correct answer?

4

When the fulcrum is in between the load and effort, the lever is said to be of

A. First type

B. Second type

C. Third type

D. Any one of these

What is the correct answer?

4

A thin spherical shell of internal diameter d is subjected to an internal pressure p. If V is the storage capacity of shell, then its diameter will be

A. (6V/ π)1/2

B. (6V/ π)1/3

C. (6V/ π)2

D. (6V/ π)3

What is the correct answer?

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 %

What is the correct answer?

4

Plastic flow in ductile materials

A. Increases the seriousness of static loading stress concentration

B. Lessens the seriousness of static loading stress concentration

C. Has no effect on it

D. Depends on other considerations

What is the correct answer?

4

The design calculations for members subject to fluctuating loads with the same factor of safety, yield the most conservative estimates when using

A. Gerber relation

B. Soderberg relation

C. Goodman relation

D. None of these

What is the correct answer?

4

If the centre distance of the mating gears having involute teeth is increased, then the pressure angle

A. Increases

B. Decreases

C. Remains unchanged

D. None of these

What is the correct answer?

4

A connecting rod is designed as a

A. Long column

B. Short column

C. Strut

D. All of these

What is the correct answer?

4

The cold working of metals is carried out __________ the recrystallisation temperature.

A. Above

B. Below

C. At

D. None of these

What is the correct answer?

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

What is the correct answer?

4

A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved surface of the shaft, is known as,

A. Hollow saddle key

B. Hollow key

C. Soft key

D. None of these

What is the correct answer?

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

What is the correct answer?

4

Shear stress theory is applicable for

A. Ductile materials

B. Brittle materials

C. Elastic materials

D. All of the above

What is the correct answer?

4

The bearings of heavy series have capacity ________ over the medium series.

A. 20 to 30%

B. 10 to 20%

C. 30 to 40%

D. 40 to 50%

What is the correct answer?

4

According to Indian standards, the diameter of rivet hole is made larger than the basic size of rivet by

A. 0.5 mm upto rivet diameter of 24 mm

B. 1 mm for rivet diameter from 27 mm to 36 mm

C. 2 mm for rivet diameter from 39 mm to 48 mm

D. All of the above

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

What is the correct answer?

4

A transmission shaft includes

A. Over head shaft

B. Counter shaft

C. Line shaft

D. All of these

What is the correct answer?

4

The rolling contact bearings are known as

A. Thick lubricated bearings

B. Plastic bearings

C. Antifriction bearings

D. Thin lubricated bearings

What is the correct answer?

4

In order to obtain bolt of uniform strength

A. Increase shank diameter

B. Increase its length

C. Drill an axial hole through head up to threaded portion so that shank area is equal to root area of thread

D. Tighten die bolt properly

What is the correct answer?

4

Basic shaft 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

What is the correct answer?

4

In designing a connecting rod, it is considered like __________ for buckling about X-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

What is the correct answer?

4

A taper key which fits half in the key way of the hub and half in the key way of shaft, is known as

A. Angular bevel gears

B. Mitre gears

C. Crown Bevel gears

D. Internal bevel gears