GATE ME exam:gate PYQs & Answers — Page 16

Questions 151–160 of 1040. Imported answers require independent review unless marked reviewed.

Topic practice 1040 questionsPage 16 of 104

Which one of the following statements regarding a Rankine cycle is FALSE?

Your answerChoose one option.

Superheating the steam in the boiler increases the cycle efficiency.

The pressure at the turbine outlet depends on the condenser temperature.

Cycle efficiency increases as condenser pressure decreases.

Cycle efficiency increases as boiler pressure decreases.

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For a ball bearing, the fatigue life in millions of revolutions is given by

, where

is the constant applied load and

is the basic dynamic load rating. Which one of the following statements is TRUE?

Your answerChoose one option.

, assuming that the inner race is fixed and outer race is revolving

, assuming that the outer race is fixed and inner race is revolving

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The change in kinetic energy

of an engine is 300 J, and minimum and maximum shaft speeds are

and

, respectively. Assume that the torque-time function is purely harmonic. To achieve a coefficient of fluctuation of 0.05, the moment of inertia (in kg.m

) of the flywheel to be mounted on the engine shaft is

Your answerChoose one option.

0.113

0.096

0.071

0.053

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A ram in the form of a rectangular body of size

and

is suspended by two parallel ropes of lengths 7 m. Assume the center-of-mass of the body is at its geometric center and

. For striking the object P with a horizontal velocity of 5 m/s, what is the angle

with the vertical from which the ram should be released from rest?

Diagram for Mechanical Engineering question 24

Your answerChoose one option.

67.1°

40.2°

35.1°

79.5°

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A linear spring-mass-dashpot system with a mass of 2 kg is set in motion with viscous damping. If the natural frequency is 15 Hz, and the amplitudes of two successive cycles measured are 7.75 mm and 7.20 mm, the coefficient of viscous damping (in N.s/m) is

Your answerChoose one option.

4.41

7.51

2.52

6.11

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Which one of the following failure theories is the most conservative design approach against fatigue failure?

Your answerChoose one option.

Soderberg line

Modified Goodman line

Gerber line

Yield line

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A rigid massless tetrahedron is placed such that vertex O is at the origin and the other three vertices A, B, and C lie on the coordinate axes as shown in the figure. The body is acted on by three point loads, of which one is acting at A along x-axis and another at point B along y-axis. For the body to be in equilibrium, the third point load acting at point O must be

Diagram for Mechanical Engineering question 27

Your answerChoose one option.

along z-axis

plane but not along

axis

plane but not along

axis

plane but not along

axis

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The phases present in pearlite are

Your answerChoose one option.

austenite and ferrite

cementite and austenite

ferrite and cementite

martensite and ferrite

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The “Earing” phenomenon in metal forming is associated with

Your answerChoose one option.

deep draw

rolling

extrusion

forging

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The grinding wheel used to provide the best surface finish is

Your answerChoose one option.

A36L5V

A54L5V

A60L5V

A80L5V

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GATE ME exam:gate PYQs

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Question 28

Question 29

Question 30