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4

The ratio of maximum shear stress developed in a rectangular beam and a circular beam of the same cross-sectional area is

A. 2/3

B. 3/4

C. 1

D. 9/8

Correct Answer :

D. 9/8


Related Questions

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4

Within elastic limit, stress is

A. Inversely proportional to strain

B. Directly proportional to strain

C. Square root of strain

D. Equal to strain

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4

The efficiency and work ratio of a simple gas turbine cycle are

A. Low

B. Very low

C. High

D. Very high

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4

The standard value of atmospheric pressure taken at sea level is

A. 1.013 bar

B. 760 mm of Hg

C. 1013 × 102 N/m2

D. All of these

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4

When a closely-coiled helical spring of mean diameter (D) is subjected to an axial load (W), the stiffness of the spring is given by

A. Cd⁴/D3n

B. Cd⁴/2D3n

C. Cd⁴/4D3n

D. Cd⁴/8D3n

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4

The thermodynamic difference between a Rankine cycle working with saturated steam and the Carnot cycle is that

A. Carnot cycle can't work with saturated steam

B. Heat is supplied to water at temperature below the maximum temperature of the cycle

C. A Rankine cycle receives heat at two places

D. Rankine cycle is hypothetical

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4

The neutral axis of the cross-section a beam is that axis at which the bending stress is

A. Zero

B. Minimum

C. Maximum

D. Infinity

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4

The efficiency of Ericsson cycle is __________ Carnot cycle.

A. Greater than

B. Less than

C. Equal to

D. None of these

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4

The unit of Young's modulus is

A. mm/mm

B. kg/cm

C. Kg

D. kg/cm²

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4

In an ideal gas turbine plant, it is assumed that the compression and expansion processes are

A. Isothermal

B. Isentropic

C. Polytropic

D. None of these

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4

A continuous beam is one which is

A. Fixed at both ends

B. Fixed at one end and free at the other end

C. Supported on more than two supports

D. Extending beyond the supports

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4

Which of the following is a reversible non-flow process?

A. Isochoric process

B. Isobaric process

C. Hyperbolic process

D. All of these

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4

In open cycle gas turbine plants

A. The indirect heat exchanger and cooler is avoided

B. Direct combustion system is used

C. A condenser is used

D. All of the above

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4

The ultimate tensile stress of mild steel compared to ultimate compressive stress is

A. Same

B. More

C. Less

D. Unpredictable

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4

When the expansion or compression takes place according to the law pvn = C, the process is known as

A. Isothermal process

B. Adiabatic process

C. Hyperbolic process

D. Polytropic process

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4

One kilowatt is equal to

A. 1 N-m/s

B. 100 N-m

C. 1000 N-m/s

D. 1 × 106 N-m/s

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4

In a tensile test, near the elastic limit zone, the

A. Tensile strain increases more quickly

B. Tensile strain decreases more quickly

C. Tensile strain increases in proportion to the stress

D. Tensile strain decreases in proportion to the stress

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4

If the value of n = 0 in the equation pvn = C, then the process is called

A. Constant volume process

B. Adiabatic process

C. Constant pressure process

D. Isothermal process

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4

Energy can neither be created nor destroyed, but it can be transformed from one form to another. This statement is known as

A. Zeroth law of thermodynamics

B. First law of thermodynamics

C. Second law of thermodynamics

D. Kinetic theory of gases

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4

The molecular mass expressed in gram (i.e. 1 g - mole) of all gases, at N. T. P., occupies a volume of

A. 0.224 litres

B. 2.24 litres

C. 22.4 litres

D. 224 litres

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4

A definite area or a space where some thermodynamic process takes place is known as

A. Thermodynamic system

B. Thermodynamic cycle

C. Thermodynamic process

D. Thermodynamic law

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4

Carnot cycle consists of

A. Two constant volume and two isentropic processes

B. Two isothermal and two isentropic processes

C. Two constant pressure and two isentropic processes

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

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4

The state of stress at a point in a loaded member is shown in the below figure. The magnitude of maximum shear stress is

A. 10 MPa

B. 30 MPa

C. 50 MPa

D. 100 MPa

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4

The ratio of specific heat at constant pressure (cp) and specific heat at constant volume (cv) is always __________ one.

A. Equal to

B. Less than

C. Greater than

D. None of these

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4

When shear force at a point is zero, then bending moment is _________ at that point.

A. Zero

B. Minimum

C. Maximum

D. Infinity

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4

The gas in cooling chamber of a closed cycle gas turbine is cooled at

A. Constant volume

B. Constant temperature

C. Constant pressure

D. None of these

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4

Steam coal is a

A. Pulverised coal

B. Brown coal

C. Coking bituminous coal

D. Non-coking bituminous coal

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4

When a bar is subjected to a change of temperature and its deformation is prevented, the stress induced in the bar is

A. Tensile stress

B. Compressive stress

C. Shear stress

D. Thermal stress

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4

For a beam, as shown in the below figure, when the load W is applied in the centre of the beam, the maximum deflection is

A. Wl3 / 48EI

B. 5Wl3 / 384EI

C. Wl3 / 392EI

D. Wl3 / 384EI

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4

The ratio of maximum shear stress developed in a rectangular beam and a circular beam of the same cross-sectional area is

A. 2/3

B. 3/4

C. 1

D. 9/8

What is the correct answer?

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