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AE-JE (ME) II Theory of machine Quiz-5

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Question 1

In which one of the following is a flywheel generally employed?

Question 2

The turning moment diagram for a single cylinder double acting steam engine consists of +ve and –ve loops above and below the average torque line. For the +ve loop, the ratio of the speeds of the flywheel at the beginning and the end is which one of the following?

Question 3

In a flywheel, the safe stress is

and the density is

Then what is the maximum peripheral velocity

Question 4

The maximum speed of the governor is 400 rpm and minimum speed is 200 rpm then the sensitiveness is

Question 5

Introduction of the flywheel in a rotating system smoothens

Question 6

Flywheel absorbs energy during those periods of crank rotation when

Question 7

The maximum speed and minimum speed in r.p.m. at a Watt governor are 72 and 68 respectively. The range of speed of the governor is :

Question 8

Maximum fluctuation of kinetic energy in an engine has been calculated to be 2600 J. Assuming that the engine runs at an average speed of 200 rpm, the polar mass moment of inertia (in kg. $Description: D:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE-ME-2014-Set-2_files\image147.png$ ) of a fly wheel to keep the speed fluctuation within ±0.5% of the average speed is _________

Question 9

The crank of a slider-crank punching press has a mass moment of inertia of

. The figure below shows the torque demand per revolution for a punching operation. If the speed of the crank is found to drop from 30 rad/s to 20rad/s during punching, what is maximum torque demand during the punching operation?

Question 10

In a variable speed SI. Engine, the maximum torque occurs at the maximum ______

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AE & JE Exams Mechanical Engineering

Feb 22AE & JE Exams