GATE XE kind:question PYQs & Answers — Page 134

Questions 1331–1340 of 1772. Imported answers require independent review unless marked reviewed.

Two solid shafts P and Q made of same material transmit equal torque. Shaft P has a uniform circular cross section of area

and shaft Q has a uniform circular cross section of area

. If the maximum torsional shear stress developed in shaft P is 160 MPa, the maximum torsional shear stress developed (in MPa) in shaft Q is ________.

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The slotted arm AB rotates in the horizontal plane about point A at a constant angular speed ω = 10 rad/sec. The particle P is released from rest, in the frictionless slot, at a distance of 2 m from A. The magnitude of the velocity of the particle (in m/s) just before it hits end B is ________ (rounded off to two decimal places).

Diagram for Engineering Sciences question 20

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The uniform pendulum rod, having mass 10 kg and length

, is attached to a viscous damper having damping coefficient

. Use acceleration due to gravity

. The least value of

(in N-s/m) such that small motions of the pendulum rod decay with oscillations is ________.\n

Diagram for Engineering Sciences question 21

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A beam having a constant solid rectangular cross section is subjected to pure bending. The longitudinal strain at a point A on the cross section is

. If the Young’s modulus of the material of the beam is 200 GPa, the maximum tensile stress (in MPa) is ________.

Diagram for Engineering Sciences question 22

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One kg of an ideal gas (molecular weight = X) occupies a certain volume

at temperature

and pressure

. Four kg of another ideal gas (molecular weight = 2X) is added to the first gas keeping the volume

and temperature

same as before. The final pressure is

Your answerChoose one option.

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Which of the following is an intensive thermodynamic property?

Your answerChoose one option.

Enthalpy

Internal energy

Entropy

Pressure

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A thermodynamic process for a substance is represented as a constant pressure process on a

diagram, and a constant temperature process on a

diagram. Which of the following statements is TRUE?

Your answerChoose one option.

The substance is an ideal gas.

The substance is a van der Waals gas.

The substance undergoes a phase change.

Such a process is not possible.

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Addition of a reheat process to a simple Rankine cycle will always

Your answerChoose one option.

increase both efficiency and work output of the cycle.

increase efficiency but not necessarily work output of the cycle.

increase work output but not necessarily efficiency of the cycle.

decrease both efficiency and work output of the cycle.

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A Carnot cycle implemented using an ideal gas in a piston-cylinder system will have

Your answerChoose one option.

work transfer in two parts of the cycle and heat transfer in the other two parts of the cycle.

work transfer in all four parts of the cycle and heat transfer in two parts of the cycle.

work transfer in two parts of the cycle and heat transfer in all four parts of the cycle.

work transfer in all four parts of the cycle and heat transfer in all four parts of the cycle.

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The “degrees of freedom” for a pure substance at its triple point is

Your answerChoose one option.

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GATE XE kind:question PYQs

Question 19

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Question 21

Question 22

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Question 6