Home
Current Affairs January 2024

What is the correct answer?

4

In block brakes, the ratio of shoe width to wheel diameter is taken between

A. 0.1 and 0.25

B. 0.25 and 0.50

C. 0.50 and 0.75

D. 0.75 and 1

Correct Answer :

B. 0.25 and 0.50


Related Questions

What is the correct answer?

4

For hardening alloy steels and high speed steels, they are heated to

A. 1100 to 1300°C

B. 1300 to 1500°C

C. 500 to 600°C

D. 700 to 900°C

What is the correct answer?

4

The design of the pressure vessel is based on

A. Longitudinal stress

B. Hoop stress

C. Longitudinal and hoop stress

D. None of these

What is the correct answer?

4

Lewis equation in gears is used to find the

A. Tensile stress in bending

B. Shear stress

C. Compressive stress in bending

D. Fatigue stress

What is the correct answer?

4

Stress concentration in cyclic loading is more serious in

A. Ductile materials

B. Brittle materials

C. Equally serious in both cases

D. Depends on other factors

What is the correct answer?

4

In composite or reverse laid ropes

A. Direction of twist of wires in strands is opposite to the direction of twist of strands

B. Direction of twist of wires and strands are same

C. Wires in two adjacent strands are twisted in opposite direction

D. Wires are not twisted

What is the correct answer?

4

A compound cylinder with inner radius 50 mm and outer radius 70 mm is made by shrinking one cylinder on to the other cylinder, the junction radius is 60 mm and the junction pressure is 1.1 N/mm². The maximum hoop stress developed in the inner cylinder is

A. 3.6 N/mm² compression

B. 3.6 N/mm² tension

C. 7.2 N/mm² compression

D. 7.2 N/mm² tension

What is the correct answer?

4

The crest diameter of a screw thread is same as

A. Major diameter

B. Minor diameter

C. Pitch diameter

D. Core diameter

What is the correct answer?

4

The product of the diametral pitch and circular pitch is equal to

A. 1

B. 1/π

C. π

D. π × number of teeth

What is the correct answer?

4

The toughness of a material _________ when it is heated

A. Does not change

B. Increases

C. Decreases

D. None of the Above

What is the correct answer?

4

If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to

A. Diameter of bolt

B. 0.75 × diameter of bolt

C. 1.25 × diameter of bolt

D. 1.5 × diameter of bolt

What is the correct answer?

4

Factor of safety for fatigue loading is the ratio of

A. Elastic limit to the working stress

B. Elastic limit to the yield point

C. Endurance limit to the working stress

D. Young's modulus to the ultimate tensile strength

What is the correct answer?

4

In order to remove internal stresses produced by hardening the steel, the process usually adopted is

A. Tempering

B. Normalising

C. Annealing

D. Spheroidising

What is the correct answer?

4

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

A. 0.5 times

B. Equal to

C. 2 times

D. Double

What is the correct answer?

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

What is the correct answer?

4

Two shafts of the same length and material are joined in series. If the ratio of their diameters is 2, then the ratio of their angles of twist will be

A. 2

B. 4

C. 8

D. 16

What is the correct answer?

4

The cam follower extensively used in aircraft engines is

A. Knife edge follower

B. Flat faced follower

C. Spherical faced follower

D. Roller follower

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

In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by

A. Decreasing the cross-section area of bar

B. Increasing the cross-section area of bar

C. Remain unaffected with cross-section area

D. Would depend upon other factors

What is the correct answer?

4

In Vickers hardness testing, the pyramid indentor apex is

A. 40°

B. 122°

C. 136°

D. 152°

What is the correct answer?

4

A triple riveted butt joint with double straps of unequal width is to be designed for a boiler shell. The pitch of the rivets in the outer row is double the pitch in the inner row and zigzag riveting is proposed. Which of the following statement is correct?

A. There are four rivets per pitch length, all in double shear

B. There are four rivets per pitch length, out of which two are in single shear and two are in double shear

C. There are five rivets per pitch length, all in double shear

D. There are five rivets per pitch length, out of which four are in double shear and one is in single shear

What is the correct answer?

4

Which of the following screw thread is adopted for power transmission in either direction?

A. Acme threads

B. Square threads

C. Buttress threads

D. Multiple threads

What is the correct answer?

4

In designing thick cylinders, the equation used is

A. Lame's equation

B. Birnie's equation

C. Clavarinos' equation

D. All 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

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

In the calculation of induced shear stress in helical springs, the Wahl's stress factor is used to take care of

A. Combined effect of transverse shear stress and bending stress in the wire

B. Combined effect of bending stress and curvature of the wire

C. Combined effect of transverse shear stress and curvature of wire

D. Combined effect of torsional shear stress and transverse shear stress in the wire

What is the correct answer?

4

A type of brake commonly used in motor cars is a

A. Shoe brake

B. Band and block brake

C. Band brake

D. Internal expanding brake

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

The suitable material for belt used in flour mill is

A. Leather

B. Rubber

C. Canvas or cotton duck

D. Balata gum

What is the correct answer?

4

18/8 steel contains

A. 18% nickel and 8% chromium

B. 18% chromium and 8% nickel

C. 18% nickel and 8% vanadium

D. 18% vanadium and 8% nickel

What is the correct answer?

4

Deep groove ball bearings are used for

A. Heavy thrust load only

B. Small angular displacement of shafts

C. Radial load at high speed

D. Combined thrust and radial loads at high speed