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Engineering Mechanics

Engineering Mechanics
A framed structure is perfect, if the number of members are __________ (2j - 3), where j is the number of joints.

Greater than
Equal to
Less than
None of these

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Engineering Mechanics
A redundant frame is also called __________ frame.

Imperfect
Perfect
None of these
Deficient

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Engineering Mechanics
An ideal machine is one whose efficiency is

Between 60 and 70 %
1
Between 70 and 80%
Between 80 and 90%

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Engineering Mechanics
One joule is equal to

0.1 N-m
100 N-m
10 N-m
1 N-m

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Engineering Mechanics
The moment of inertia of a solid cone of mass ‘m’ and base radius ‘r’ about its vertical axis is

3mr²/5
4mr²/5
3mr²/10
2mr²/5

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Engineering Mechanics
A block of mass 20 kg lying on a rough horizontal plane is connected by a light string passing over a smooth pulley to another mass 5 kg, which can move freely in the Vertical direction, as shown in the below figure. The tension in the string will ___________ with the increase in coefficient of friction.

Decrease
Not be effected
None of these
Increase

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