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4

Wire ropes as compared to cotton ropes

A. Are lighter in weight

B. Offer silent operation

C. Can withstand shock loads

D. All of these

Correct Answer :

D. All of these


Related Questions

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4

Lewis form factor for 14 ½° composite and full depth involute system is (where T = Number of teeth)

A. 0.124 - (0.684/T)

B. 0.154 - (0.912/T)

C. 0.175 - (0.841/T)

D. None of these

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4

The taper on a rectangular sunk key is

A. 1 in 16

B. 1 in 32

C. 1 in 48

D. 1 in 100

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4

In a marine flange coupling, the pitch circle diameter of bolts is taken as

A. 1.2 d

B. 1.6 d

C. 2d

D. 2.5 d

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4

The rated life of a bearing varies

A. Directly as load

B. Inversely as square of load

C. Inversely as cube of load

D. Inversely as fourth power of load

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4

Slenderness ratio is the ratio of

A. Effective length of column to least radius of gyration of the column

B. Width of column to depth of column

C. Maximum size of column to minimum size of column

D. Effective length of column to width of column

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4

In order to avoid tearing of the plate at an edge, the distance from the centre line of the rivet hole to the nearest edge of the plate should be equal to (where d = Diameter of rivet hole)

A. d

B. 1.5 d

C. 2.5 d

D. 2 d

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4

An elastic bar is fixed at the upper end and loaded at the lower end by a falling weight. The shock load produced can be reduced by

A. Increasing the length of bar

B. Decreasing the cross-sectional area of the bar

C. Decreasing the modulus of elasticity of the bar

D. All of the above

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4

The shock resistance of steel is increased by adding

A. Nickel

B. Chromium

C. Nickel and chromium

D. Cobalt and molybdenum

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4

In designing a sleeve coupling, length of the sleeve is taken as (where d = Diameter of the shaft)

A. d + 17 mm

B. 2d + 13 mm

C. 2d + 20 mm

D. 3.5d

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4

The period during which the cam follower remains at rest, when cam moves, is known as

A. Constant period

B. Fixed period

C. Dwell period

D. Idle period

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4

A shaft is subjected to a maximum bending stress of 80 N/mm² and maximum shearing stress equal to 30 N/mm² at a particular section. If the yield point in tension of the material is 280 N/mm² and the maximum shear stress theory of failure is used, then the factor of safety obtained will be

A. 2.5

B. 2.8

C. 3.0

D. 3.5

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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

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

In hydrodynamic bearings

A. The oil film pressure is generated only by the rotation of the journal

B. The oil film is maintained by supplying oil under pressure

C. Do not require external supply of lubricant

D. Grease is used for lubrication

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4

The ratio of endurance limit in shear to the endurance limit in flexure is

A. 0.70

B. 0.25

C. 0.40

D. 0.55

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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

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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

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

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4

In cross or regular lay 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

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4

A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is

A. 2000 N-m

B. 2050 N-m

C. 2100 N-m

D. 2136 N-m

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4

A steel containing 0.8% carbon is known as

A. Eutectoid steel

B. Hypereutectoid steel

C. Hypo-eutectoid steel

D. None of these

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4

In a partial journal bearing, the angle of contact of the bearing with the journal is

A. 120°

B. 180°

C. 270°

D. 360°

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4

A V-belt designated as B 4430 LP has

A. 4430 mm as diameter of small pulley

B. 4430 mm as nominal pitch length

C. 4430 mm as diameter of large pulley

D. 4430 mm as centre distance between pulleys

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4

The stress which vary from a minimum value to a maximum value of the same nature (i.e. tensile or compressive) is called

A. Repeated stress

B. Yield stress

C. Fluctuating stress

D. Alternating stress

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4

The load cup of a screw jack is made separate from the head of the spindle to

A. Prevent the rotation of load being lifted

B. Enhance the load carrying capacity of the jack

C. Reduce the effort needed for lifting the working load

D. Reduce the value of frictional torque

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4

In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing

A. Remains constant at all speeds

B. Is minimum at zero speed and increases monotonically with increase in speed

C. Is maximum at zero speed and decreases monotonically with increase in speed

D. Becomes minimum at an optimum speed and then increases with further increase in speed

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4

Taper on the cotter and slot is provided

A. On both the sides

B. On one side only

C. On none of the sides

D. May be provided anywhere

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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

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

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4

The resultant axial load on a bolt depends upon

A. External load applied

B. Initial tension due to tightening of the bolt

C. Relative elastic yielding of the bolt and the connected members

D. All of the above