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Theory of Machine

Theory of Machine
V-belts are usually used for

Short drives
Long and short drives
None of these
Long drives

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Theory of Machine
In a steam engine, the distance by which the outer edge of the D-slide valve overlaps the steam port is called

Lead
Steam lap
None of these
Exhaust lap

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Theory of Machine
The mechanism consisting of three turning pairs and one sliding pair, is called a

Single slider crank chain
Crank and slotted lever quick return motion mechanism
All of these
Whitworth quick return motion mechanism

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Theory of Machine
In multi V-belt transmission, if one of the belt is broken, we have to change the

All the belts
There is no need of changing any one as remaining belts can take care of transmission of load
Broken belt and its adjacent belts
Broken belt

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Theory of Machine
There are six gears A, B, C, D, E and F in a compound train. The numbers of teeth in the gears are 20, 60, 30, 80, 25 and 75 respectively. The ratio of angular speeds of the driven (F) to the driver (A) of the drive is

1/24
4/15
1/8
12

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Theory of Machine
The power of a Porter governor is equal to

[3c²/(1 + 2c)] (m + M) g.h
[4c²/(1 + 2c)] (m + M) g.h
[c²/(1 + 2c)] (m + M) g.h
[2c²/(1 + 2c)] (m + M) g.h

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