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Theory-of-machines Questions Set 7:

Quiz Mode

What is the value of the universal gas constant (R)?

0.718 KJ/Kg

1.005 KJ/Kg

0.287 KJ/Kg

0.574 KJ/Kg

Solution:

What type of motion is generated by a Scotch yoke mechanism?

Logarithmic motion

Sine wave motion

Inverted motion

Square root motion

Solution:

Evaluate the arc of contact between two involute gears, having path of contact 30 mm and pressure angle of 55°.

52.31 mm

50.12 mm

61.92 mm

44.23 mm

Solution:

A linkage has 16 links and 7 loops. Calculate the degree of freedom associated with this linkage if the linkage consists of only single turning pairs.

Solution:

Find the load torque magnitude if the angular speed of the driven member is three times the driving member, and the input torque is 180 N⋅m.

50 N⋅m

60 N⋅m

90 N⋅m

80 N⋅m

Solution:

A wheel accelerates uniformly from rest to 2000 revolutions per minute (rpm) in 20 seconds. What is its angular acceleration?

20.095 rad/s²

10.475 rad/s²

10.425 rad/s²

20.425 rad/s²

Solution:

In a multi-plate clutch, the torque T is 150 N-m, the number of friction plates n is 4, the coefficient of friction μ is 0.3, and the radius R is 0.1 m. Find the axial thrust.

18 N

1250 N

200 N

1800 N

Solution:

A circular solid disc of uniform thickness 20 mm, radius 200 mm and mass 20 kg, is used as a flywheel. If it rotates at 600 rpm, the kinetic energy of the flywheel, in Joules is:

800 J

780 J

750 J

790 J

Solution:

A wheel with a moment of inertia of 0.10 kg-m² is rotating about a shaft at an angular speed of 180 revolutions per minute. A second wheel is set into rotation at 300 revolutions per minute and is coupled to the same shaft so that both wheels finally rotate with a common angular speed of 200 revolutions per minute. The moment of inertia of the second wheel (in kg-m²) is:

0.04

0.02

0.06

0.03

Solution:

A small connecting rod of mass 1.5 kg is suspended in a horizontal plane by two wires 1.25 m long. The wires are attached to the rod at points 120 mm on either side of the center of gravity. If the rod makes 20 oscillations in 40 seconds, the radius of gyration is 107 mm. Find the mass moment of inertia of the rod about a vertical axis through the center of gravity.

0.027 kg-m^2

0.026 kg-m^2

0.017 kg-m^2

0.016 kg-m^2

Theory-of-machines Questions Set 7:

What is the value of the universal gas constant (R)?

Solution:

What type of motion is generated by a Scotch yoke mechanism?

Solution:

Evaluate the arc of contact between two involute gears, having path of contact 30 mm and pressure angle of 55°.

Solution:

A linkage has 16 links and 7 loops. Calculate the degree of freedom associated with this linkage if the linkage consists of only single turning pairs.

Solution:

Find the load torque magnitude if the angular speed of the driven member is three times the driving member, and the input torque is 180 N⋅m.

Solution:

A wheel accelerates uniformly from rest to 2000 revolutions per minute (rpm) in 20 seconds. What is its angular acceleration?

Solution:

In a multi-plate clutch, the torque T is 150 N-m, the number of friction plates n is 4, the coefficient of friction μ is 0.3, and the radius R is 0.1 m. Find the axial thrust.

Solution:

A circular solid disc of uniform thickness 20 mm, radius 200 mm and mass 20 kg, is used as a flywheel. If it rotates at 600 rpm, the kinetic energy of the flywheel, in Joules is:

Solution:

Solution:

Solution:

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