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Theory-of-machines Questions Set 11:

Quiz Mode

For a planar mechanism with 10 instantaneous centers, find the number of links with revolute joints.

Solution:

For the given epicyclic gear train, if Gear B is fixed and arm C makes 10 revolutions, the number of revolutions made by Gear A will be:

Solution:

In a diesel engine, the heat supplied is 75.33 kW and heat rejected is 56.56 kW. Find the indicated power of the engine.

18.77 kW

4260.66 kW

131.89 kW

1.33 kW

Solution:

The motion between the teeth of meshing gears is

partly sliding and partly rolling

may be rolling or sliding depending upon the shape of teeth

rolling

sliding

Solution:

In an IC engine, if the heat supplied is 2000 kJ/kg and the heat rejected is 100 kJ/kg, determine the total work done.

20 kJ/kg

0.05 kJ/kg

1900 kJ/kg

2100 kJ/kg

Solution:

Which of the following represents a positive drive mechanism?

Mechanism of a watch

None of these

Two pulleys connected by a rope

Two pulleys connected by a belt

Solution:

Which type of linkage satisfies the condition s+l = p+q according to Grashof's law?

Deltoid linkage

Parallelogram linkage

Both deltoid and parallelogram linkages

Neither deltoid nor parallelogram linkages

Solution:

In a conical clutch, considering uniform wear, T = nμWR. What is the expression for R?

{(r1 – r2)/2} x cosec α

{(r1 + r2)/2} x cosec α

{2(r1^3 – r2^3) / 3(r1² – r2)²} x cosec α

{2(r1^3 + r2^3) / 3(r1² + r2²)} x cosec α

Solution:

A fixed-gear having 250 teeth is in mesh with another gear having 50 teeth. The two gears are connected by an arm. The number of turns made by the smaller gear for one revolution of the arm about the center of the bigger gear is

Solution:

The relation between the number of links (l) and the number of binary joints (j) for a kinematic chain having constrained motion is given by j = 3/2 l - 2. If the left-hand side of this equation is greater than the right-hand side, then the chain is

locked chain

completely constrained chain

successfully constrained chain

incompletely constrained chain

Theory-of-machines Questions Set 11:

For a planar mechanism with 10 instantaneous centers, find the number of links with revolute joints.

Solution:

For the given epicyclic gear train, if Gear B is fixed and arm C makes 10 revolutions, the number of revolutions made by Gear A will be:

Solution:

In a diesel engine, the heat supplied is 75.33 kW and heat rejected is 56.56 kW. Find the indicated power of the engine.

Solution:

The motion between the teeth of meshing gears is

Solution:

In an IC engine, if the heat supplied is 2000 kJ/kg and the heat rejected is 100 kJ/kg, determine the total work done.

Solution:

Which of the following represents a positive drive mechanism?

Solution:

Which type of linkage satisfies the condition s+l = p+q according to Grashof's law?

Solution:

In a conical clutch, considering uniform wear, T = nμWR. What is the expression for R?

Solution:

A fixed-gear having 250 teeth is in mesh with another gear having 50 teeth. The two gears are connected by an arm. The number of turns made by the smaller gear for one revolution of the arm about the center of the bigger gear is

Solution:

The relation between the number of links (l) and the number of binary joints (j) for a kinematic chain having constrained motion is given by j = 3/2 l - 2. If the left-hand side of this equation is greater than the right-hand side, then the chain is

Solution:

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