THEORY OF MACHINE QUIZ

For two governors A and B, the lift of sleeve of governor A is more than that of governor B, for a given fractional change in speed. It indicates that

None of these

Both governors A and B are equally sensitive

Governor B is more sensitive than governor A

Governor A is more sensitive than governor B

TRUE ANSWER : ?
YOUR ANSWER : ?

The Grubler's criterion for determining the degrees of freedom (n) of a mechanism having plane motion is (where l = Number of links, and j = Number of binary joints)

n = 3(l - 1) - 2j

n = (l -1) - j

n = 4(l - 1) - 3j

n = 2(l - 1) - 2j

TRUE ANSWER : ?
YOUR ANSWER : ?

The Whitworth quick return motion mechanism is formed in a slider crank chain when the

Smallest link is a fixed link

Coupler link is fixed

Slider is a fixed link

Longest link is a fixed link

TRUE ANSWER : ?
YOUR ANSWER : ?

In involute gears, the pressure angle is

Dependent on the size of gears

Always constant

Always variable

Dependent on the size of teeth

TRUE ANSWER : ?
YOUR ANSWER : ?

The ratio of height of Porter governor (when length of arms and links are equal) to the height of Watt's governor is (where m = Mass of the ball, and M = Mass on the sleeve)

M/(m + M)

m/(m + M)

(m + M)/M

(m + M)/m

TRUE ANSWER : ?
YOUR ANSWER : ?

Cross head and guides form a

Sliding pair

Higher pair

Turning pair

Lower pair

TRUE ANSWER : ?
YOUR ANSWER : ?

In a simple train of wheels, the velocity ratio __________ the intermediate wheels.

Depends upon

Either A or B

None of these

Is independent of

TRUE ANSWER : ?
YOUR ANSWER : ?

Cam size depends upon

Outer circle

Prime circle

Pitch circle

Base circle

TRUE ANSWER : ?
YOUR ANSWER : ?

The type of pair formed by two elements which are so connected that one is constrained to turn or revolve about a fixed axis of another element is known as

Spherical pair

Sliding pair

Rolling pair

Turning pair

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a spring controlled governor?

Hartnell governor

Hartung governor

All of these

Wilson-Hartnell governor

TRUE ANSWER : ?
YOUR ANSWER : ?

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