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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

Correct Answer :

C. Higher


Related Questions

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The bending moment at a point on a beam is the algebraic ________ of all the moments on either side of the point.

A. Sum

B. Difference

C. Multiplication

D. None of the above

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The unit of Young's modulus is

A. mm/mm

B. kg/cm

C. Kg

D. kg/cm²

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4

The fuel mostly used in blast furnace for extracting pig iron from iron ores is

A. Hard coke

B. Soft coke

C. Pulverised coal

D. Bituminous coal

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4

The property of a working substance which increases or decreases as the heat is supplied or removed in a reversible manner, is known as

A. Enthalpy

B. Internal energy

C. Entropy

D. External energy

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4

The pull required to tear off the plate per pitch length is (where p = Pitch of rivets, t = Thickness of plates, and σt, τ and σc = Permissible tensile, shearing and crushing stresses respectively)

A. (p - 2d) t × σc

B. (p - d) t × τ

C. (p - d) t × σt

D. (2p - d) t × σt

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4

A key is subjected to side pressure as well at shearing forces. These pressures are called

A. Bearing stresses

B. Fatigue stresses

C. Crushing stresses

D. Resultant stresses

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4

The atomic mass of oxygen is

A. 12

B. 14

C. 16

D. 32

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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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The ratio of lateral strain to the linear strain within elastic limit is known as

A. Young's modulus

B. Bulk modulus

C. Modulus of rigidity

D. Poisson's ratio

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One kg of carbon requires 4/3 kg of oxygen and produces __________ kg of carbon monoxide gas.

A. 8/3

B. 11/3

C. 11/7

D. 7/3

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4

Impact strength of a material is an index of its

A. Toughness

B. Tensile strength

C. Capability of being cold worked

D. Hardness

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For a beam, as shown in the below figure, the deflection at C is (where E = Young's modulus for the beam material, and I = Moment of inertia of the beam section.

A. Wl3/48 EI

B. Wa²b²/3EIl

C. [Wa/(a√3) x EIl] x (l² - a²)3/2

D. 5Wl3/384 EI

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The smallest quantity of a substance, which can exist by itself in a chemically recognizable form is known as

A. Element

B. Compound

C. Atom

D. Molecule

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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 measurement of a thermodynamic property known as temperature is based on

A. Zeroth law of thermodynamics

B. First law of thermodynamics

C. Second law of thermodynamics

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

A. Constant volume process

B. Adiabatic process

C. Constant pressure process

D. Isothermal process

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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 fuel mostly used in steam boilers is

A. Brown coal

B. Peat

C. Coking bituminous coal

D. Non-coking bituminous coal

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4

The maximum stress produced in a bar of tapering section is at

A. Smaller end

B. Larger end

C. Middle

D. Anywhere

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4

Which of the following statement is correct?

A. The heat and work are boundary phenomena

B. The heat and work represent the energy crossing the boundary of the system

C. The heat and work are path functions

D. All of the above

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Which of the following has the highest calorific value?

A. Peat

B. Lignite

C. Bituminous coal

D. Anthracite coal

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In a prismatic member made of two materials so joined that they deform equally under axial stress, the unit stresses in two materials are

A. Equal

B. Proportional to their respective moduli of elasticity

C. Inversely proportional to their moduli of elasticity

D. Average of the sum of moduli of elasticity

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4

The reading of the pressure gauge fitted on a vessel is 25 bar. The atmospheric pressure is 1.03 bar and the value of 'g' is 9.81 m/s2. The absolute pressure in the vessel is

A. 23.97 bar

B. 25 bar

C. 26.03 bar

D. 34.81 bar

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4

The efficiency of Diesel cycle with decrease in cut-off

A. Increases

B. Decreases

C. First increases and then decreases

D. First decreases and then increases

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4

Which of the following materials is most elastic?

A. Rubber

B. Plastic

C. Brass

D. Steel

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4

If the rivets in adjacent rows are staggered and the outermost row has only one rivets, the arrangement of the rivets is called

A. Chain riveting

B. Zigzag riveting

C. Diamond riveting

D. Crisscross riveting

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4

Which of the following cycles has maximum efficiency?

A. Rankine

B. Stirling

C. Carnot

D. Brayton

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A cylindrical section having no joint is known as

A. Joint less section

B. Homogeneous section

C. Perfect section

D. Seamless section

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The processes occuring in open system which permit the transfer of mass to and from the system, are known as

A. Flow processes

B. Non-flow processes

C. Adiabatic processes

D. None of these