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Current Affairs January 2024

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4

In cylindrical cams, the follower moves

A. In a direction perpendicular to the cam axis

B. In a direction parallel to the cam axis

C. In any direction irrespective of cam axis

D. Along the cam axis

Correct Answer :

B. In a direction parallel to the cam axis


Related Questions

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4

Creep in belt is due to

A. Material of the belt

B. Material of the pulley

C. Uneven extensions and contractions due to varying tension

D. All of the above

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4

The rolling contact bearings as compared to sliding contact bearings have

A. Low starting and low running friction except at very high speeds

B. Accuracy of shaft alignment

C. Small overall dimensions

D. All 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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4

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

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

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4

The number of slots in a 25 mm castle nut is

A. 8

B. 6

C. 4

D. 2

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4

The objective of caulking in a riveted joint is to make the joint

A. Free from corrosion

B. Stronger in tension

C. Free from stress

D. Leak-proof

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4

When the length of the journal is equal to the diameter of the journal, then the bearing is said to be a

A. Short bearing

B. Long bearing

C. Medium bearing

D. Square bearing

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4

The cracks in helical springs used in railway carriages usually start on the inner side of the coil because of the fact that

A. It is subjected to a higher cyclic loading than the outer side

B. It is subjected to a higher stress than the outer side

C. It is more stretched than the outer side during the manufacturing process

D. It has a lower curvature than the outer side

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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

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4

Belt slip may occur due to

A. Heavy load

B. Loose belt

C. Driving pulley too small

D. All of the above

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4

A screw is said to be a self locking screw, if its efficiency is

A. Less than 50 %

B. More than 50 %

C. Equal to 50 %

D. None of these

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4

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

When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is

A. Bending stress only

B. A combination of torsional shear stress and bending

C. Direct shear stress only

D. A combination of bending stress and direct shear stress

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4

The taper on cotter varies from

A. 1 in 24 to 1 in 20

B. 1 in 15 to 1 in 10

C. 1 in 32 to 1 in 24

D. 1 in 48 to 1 in 24

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4

Which of the following statement is correct, for two shafts connected in parallel?

A. Torque in each shaft is the same

B. Shear stress in each shaft is the same

C. Angle of twist of each shaft is the same

D. Torsional stiffness of each shaft is the same

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4

When screw threads are to be used in a situation where power is being transmitted in one direction only, then the screw threads suitable for this will be

A. Knuckle threads

B. Square threads

C. Acme threads

D. Buttress threads

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4

The value of Lewis form factor used in design of gears is

A. Dependent on number of teeth of a gear

B. Dependent on system of teeth

C. Independent of size of teeth

D. All of these

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4

In Vickers hardness testing, the pyramid indentor apex is

A. 40°

B. 122°

C. 136°

D. 152°

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4

In case of pressure vessels having open ends, the fluid pressure induces

A. Longitudinal stress

B. Circumferential stress

C. Shear stress

D. None of these

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4

A leaf spring in automobiles is used

A. To apply forces

B. To measure forces

C. To absorb shocks

D. To store strain energy

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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

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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

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4

Which of the following cotter joint will be used to connect strap end of a connecting rod?

A. Spigot and socket cotter joint

B. Sleeve and cotter joint

C. Gib and cotter joint

D. Any one of these

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4

The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to

A. Static load

B. Dynamic load

C. Static as well as dynamic load

D. Completely reversed load

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4

According to Indian standard specifications, 100 H6/g5 means that the

A. Basic size is 100 mm

B. Actual size is 100 mm

C. Difference between the actual size and basic size is 100 mm

D. None of the above

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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

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4

The elasticity is the property of a material which enables it to

A. Regains its original shape after deformation when the external forces are removed

B. Draw into wires by the application of a tensile force

C. Resists fracture due to high impact loads

D. Retain deformation produced under load permanently

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4

A bench vice has following type of threads

A. Metric

B. Square

C. Buttress

D. Acme

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4

The wire ropes make contact at

A. Bottom of groove of the pulley

B. Sides and bottom of groove of the pulley

C. Anywhere in the groove of the pulley

D. Sides of groove of the pulley