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4

If Kh is the torque resisting capacity of a hollow shaft and Ks is that of a solid shaft, of the same material, length and weight. Then,

A. Kh > Ks

B. Kh < Ks

C. Kh = Ks

D. None of these

Correct Answer :

A. Kh > Ks


Related Questions

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4

The calorific value of gaseous fuel is expressed in

A. kJ

B. kJ/kg

C. kJ/m2

D. kJ/m3

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4

The ratio of molar specific heats for mono-atomic gas is

A. 1

B. 1.4

C. 1.67

D. 1.87

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4

The safe twisting moment for a compound shaft is equal to the

A. Maximum calculated value

B. Minimum calculated value

C. Mean value

D. Extreme value

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4

The atomic mass of sulphur is

A. 12

B. 14

C. 16

D. 32

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4

The stress necessary to initiate yielding is

A. Considerably greater than that necessary to continue it

B. Considerably lesser than that necessary to continue it

C. Greater than that necessary to stop it

D. Lesser than that necessary to stop it

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4

The ideal efficiency of a Brayton cycle without regeneration, with increase in pressure ratio will

A. Increase

B. Decrease

C. Remain unchanged

D. Increase/decrease depending on application

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4

According to kinetic theory of gases, the velocity of molecules __________ with the increase in temperature.

A. Remains constant

B. Increases

C. Decreases

D. None of these

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4

When a gas is heated at constant pressure

A. Its temperature will increase

B. Its volume will increase

C. Both temperature and volume will increase

D. Neither temperature not volume will increase

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4

Percentage reduction of area in performing tensile test on cast iron may be of the order of

A. 50 %

B. 25 %

C. 0 %

D. 15 %

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4

Petrol is distilled at

A. 65° to 220°C

B. 220° to 345°C

C. 345° to 470°C

D. 470° to 550°C

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4

The hyperbolic process is governed by

A. Boyle's law

B. Charles' law

C. Gay-Lussac law

D. Avogadro's law

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4

The following cycle is used for air craft refrigeration

A. Brayton cycle

B. Joule cycle

C. Carnot cycle

D. Reversed Brayton cycle

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4

The efficiency of the Carnot cycle may be increased by

A. Increasing the highest temperature

B. Decreasing the highest temperature

C. Increasing the lowest temperature

D. Keeping the lowest temperature constant

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4

Modulus of rigidity is defined as the ratio of

A. Longitudinal stress to longitudinal strain

B. Volumetric stress to volumetric strain

C. Lateral stress to Lateral strain

D. Shear stress to shear strain

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4

The gas constant (R) is equal to the

A. Sum of two specific heats

B. Difference of two specific heats

C. Product of two specific heats

D. Ratio of two specific heats

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4

The energy absorbed in a body, when it is strained within the elastic limits, is known as

A. Strain energy

B. Resilience

C. Proof resilience

D. Modulus of resilience

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4

The point of contra flexure is a point where

A. Shear force changes sign

B. Shear force is maximum

C. Bending moment changes sign

D. Bending moment is maximum

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4

The heat and mechanical energies are mutually convertible. This statement was established by

A. Boyle

B. Charles

C. Joule

D. None of these

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4

A closely-coiled helical spring is cut into two halves. The stiffness of the resulting spring will be

A. Same

B. Double

C. Half

D. One-fourth

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4

A cycle consisting of two adiabatic and two constant pressure processes is known as

A. Otto cycle

B. Ericsson cycle

C. Joule cycle

D. Stirling cycle

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4

The relation between equivalent length (L) and actual length (l) of a column for both ends fixed is

A. L = l/2

B. L = l/√2

C. L = l

D. L = 2l

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4

Euler's formula holds good only for

A. Short columns

B. Long columns

C. Both short and long columns

D. Weak columns

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4

The ratio of direct stress to volumetric strain in case of a body subjected to three mutually perpendicular stresses of equal intensity, is equal to

A. Young's modulus

B. Bulk modulus

C. Modulus of rigidity

D. Modulus of elasticity

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4

A double strap butt joint with equal straps is

A. Always in single shear

B. Always in double shear

C. Either in single shear or double shear

D. None of these

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4

Stirling and Ericsson cycles are

A. Reversible cycles

B. Irreversible cycles

C. Semi-reversible cycles

D. Adiabatic irreversible cycles

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4

If the radius of wire stretched by a load is doubled, then its Youngs modulus will be

A. Doubled

B. Halved

C. Becomes four times

D. None of the above

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4

Otto cycle consists of

A. Two constant volume and two isentropic processes

B. Two constant pressure and two isentropic processes

C. Two constant volume and two isothermal processes

D. One constant pressure, one constant volume and two isentropic processes

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4

A body is subjected to a tensile stress of 1200 MPa on one plane and another tensile stress of 600 MPa on a plane at right angles to the former. It is also subjected to a shear stress of 400 MPa on the same planes. The maximum normal stress will be

A. 400 MPa

B. 500 MPa

C. 900 MPa

D. 1400 MPa

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4

When gas is heated at constant pressure, the heat supplied is utilised in

A. Increasing the internal energy of gas

B. Doing some external work

C. Increasing the internal energy of gas and also for doing some external work

D. None of the above

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4

The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is

A. 0.086

B. 1.086

C. 1.086

D. 4.086