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4

A column of length (l) with both ends fixed may be considered as equivalent to a column of length __________ with both ends hinged.

A. l/8

B. l/4

C. l/2

D. l

Correct Answer :

C. l/2


Related Questions

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4

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

A. 50 %

B. 25 %

C. 20 %

D. 30 %

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4

A column of length (l) with both ends fixed may be considered as equivalent to a column of length __________ with both ends hinged.

A. l/8

B. l/4

C. l/2

D. l

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4

The work ratio of simple gas turbine cycle depends upon

A. Maximum cycle temperature

B. Minimum cycle temperature

C. Pressure ratio

D. All of these

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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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According to Avogadro's law

A. The product of the gas constant and the molecular mass of an ideal gas is constant

B. The sum of partial pressure of the mixture of two gases is sum of the two

C. Equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules

D. All of the above

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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

For the same compression ratio, the efficiency of dual combustion cycle is

A. Greater than Diesel cycle and less than Otto cycle

B. Less than Diesel cycle and greater than Otto cycle

C. Greater than Diesel cycle

D. Less than Diesel cycle

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4

The intensity of stress which causes unit strain is called

A. Unit mass

B. Modulus of rigidity

C. Bulk modulus

D. Modulus of Elasticity

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4

The distance between the centres of the rivets in adjacent rows of zigzag riveted joint is known as

A. Pitch

B. Back pitch

C. Diagonal pitch

D. Diametric pitch

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4

If both Stirling and Carnot cycles operate within the same temperature limits, then efficiency of Stirling cycle as compared to Carnot cycle

A. More

B. Less

C. Equal

D. Depends on other factors

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4

The ideal efficiency of a Brayton cycle with 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

Reversed joule cycle is called

A. Carnot cycle

B. Rankine cycle

C. Brayton cycle

D. Bell Coleman cycle

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4

Second law of thermodynamics defines

A. Heat

B. Work

C. Internal energy

D. Entropy

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4

Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle

A. Combustion is at constant volume

B. Expansion and compression are isentropic

C. Maximum temperature is higher

D. Heat rejection is lower

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4

In S. I. units, the value of the universal gas constant is

A. 8.314 J/kg mole-K

B. 83.14 J/kgmole-K

C. 831.4 J/kgmole-K

D. 8314 J/kgmole-K

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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

A close cycle gas turbine gives __________ efficiency as compared to an open cycle gas turbine.

A. Same

B. Lower

C. Higher

D. None of these

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4

The entropy may be expressed as a function of

A. Pressure and temperature

B. Temperature and volume

C. Heat and work

D. All of these

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4

A tri-atomic molecule consists of __________ atoms.

A. One

B. Two

C. Three

D. Four

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4

The value of cp/cv for air is

A. 1

B. 1.4

C. 1.45

D. 2.3

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4

The expansion ratio (r) is the ratio of (where v1 = Volume at the beginning of expansion, and v2 = Volume at the end of expansion)

A. v1/v2

B. v2/v1

C. (v1 + v2)/v1

D. (v1 + v2)/v2

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4

When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel, the process is known as __________ of fuel.

A. Atomisation

B. Carbonisation

C. Combustion

D. None of these

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4

In the below figure, the stress corresponding to point D is

A. Yield point stress

B. Breaking stress

C. Ultimate stress

D. Elastic limit

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4

Which of the following cycles is not a reversible cycle?

A. Carnot

B. Ericsson

C. Stirling

D. None of the above

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4

The relation between Young's modulus (E), shear modulus (C) and bulk modulus (K) is given by

A. E = 3K.C/(3K + C)

B. E = 6K.C/(3K + C)

C. E = 9K.C/(3K + C)

D. E = 12K.C/(3K + C)

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4

The value of gas constant (R) in S. I. units is

A. 0.287 J/kgK

B. 2.87 J/kgK

C. 28.7 J/kgK

D. 287 J/kgK

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4

The most probable velocity of the gas molecules is given by

A. √(KT/m)

B. √(2KT/m)

C. √(3KT/m)

D. √(5KT/m)

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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

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4

The neutral axis of a transverse section of a beam passes through the centre of gravity of the section and is

A. In the vertical plane

B. In the horizontal plane

C. In the same plane in which the beam bends

D. At right angle to the plane in which the beam bends

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4

The maximum shear stress, in the given figure, is equal to __________ of the Mohr's circle.

A. Radius

B. Diameter

C. Circumference

D. Area