Jobs By Abekus

Theory-of-machines Questions Set 21:

Quiz Mode

What is the relationship between the displacement of the slider and the crank angle over an interval?

Quadratic

Directly proportional

Linear

Inversely proportional

Solution:

The motion of a piston in the cylinder of a steam engine is an example of

completely constrained motion

incompletely constrained motion

successfully constrained motion

none of the above

Solution:

A Watt governor rotates at a vertical height of 300 mm at a speed of 60 rpm. If the speed is now changed to 80 rpm, what will be its new vertical height in mm?

198.66 mm

112.32 mm

168.75 mm

140.62 mm

Solution:

Consider a slider-crank mechanism rotating at 20 rad/s. The crank radius is 0.1 m. Find the velocity (in m/s) of the piston when the crank is at 90 degrees to the piston direction.

1 m/s

2 m/s

3 m/s

4 m/s

Solution:

What is the ratio of the height of a porter governor to the height of a Watt governor, when they have equal arm and link lengths, where m is the mass of the ball and M is the mass of the sleeve?

m/(M+m)

M/(m+M)

(M+m)/m

(M+m)/M

Solution:

An Oldham Coupling is used to connect two parallel shafts that are 20 mm apart. The driving shaft speed is 150 rpm. Find the maximum sliding velocity of the tongue of the intermediate piece along the groove.

0.349 m/s

0.314 m/s

0.294 m/s

None of the above

Solution:

A flywheel of mass 150 kg is given a spin of 50 rpm about its horizontal axis. If the whole assembly rotates about a vertical axis at 3 rad/s, the gyroscopic couple experienced will be ________.

Given that the radius of gyration of the flywheel is 1 m.

600π Nm

750π Nm

300π Nm

850π Nm

Solution:

The rotor of a ship rotates in a clockwise direction when viewed from the stern, and the ship takes a left turn. The effect of the gyroscopic couple acting on it will be:

To raise the bow and stern

To lower the bow and stern

To raise the stern and lower the bow

To raise the bow and lower the stern

Solution:

The turbine rotor of the ship has a mass of 2500 kg and it rotates at 1200 rpm clockwise when viewed from the aft. The radius of gyration of the rotor is 300 mm. The gyroscopic couple, if the ship turns right at a radius of 250 mm with a speed of 30 km/h, is:

941.50 N-m

680.70 N-m

750.20 N-m

794.36 N-m

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, find the radius of gyration of the rod about a vertical axis through the center of gravity.

107 mm

108 mm

109 mm

106 mm

Theory-of-machines Questions Set 21:

What is the relationship between the displacement of the slider and the crank angle over an interval?

Solution:

The motion of a piston in the cylinder of a steam engine is an example of

Solution:

A Watt governor rotates at a vertical height of 300 mm at a speed of 60 rpm. If the speed is now changed to 80 rpm, what will be its new vertical height in mm?

Solution:

Consider a slider-crank mechanism rotating at 20 rad/s. The crank radius is 0.1 m. Find the velocity (in m/s) of the piston when the crank is at 90 degrees to the piston direction.

Solution:

What is the ratio of the height of a porter governor to the height of a Watt governor, when they have equal arm and link lengths, where m is the mass of the ball and M is the mass of the sleeve?

Solution:

An Oldham Coupling is used to connect two parallel shafts that are 20 mm apart. The driving shaft speed is 150 rpm. Find the maximum sliding velocity of the tongue of the intermediate piece along the groove.

Solution:

A flywheel of mass 150 kg is given a spin of 50 rpm about its horizontal axis. If the whole assembly rotates about a vertical axis at 3 rad/s, the gyroscopic couple experienced will be ________.

Given that the radius of gyration of the flywheel is 1 m.

Solution:

The rotor of a ship rotates in a clockwise direction when viewed from the stern, and the ship takes a left turn. The effect of the gyroscopic couple acting on it will be:

Solution:

The turbine rotor of the ship has a mass of 2500 kg and it rotates at 1200 rpm clockwise when viewed from the aft. The radius of gyration of the rotor is 300 mm. The gyroscopic couple, if the ship turns right at a radius of 250 mm with a speed of 30 km/h, is:

Solution:

Solution:

Related Question Sets:

Related Topics:

Theory-of-machines Questions Set 21:

What is the relationship between the displacement of the slider and the crank angle over an interval?

Solution:

The motion of a piston in the cylinder of a steam engine is an example of

Solution:

A Watt governor rotates at a vertical height of 300 mm at a speed of 60 rpm. If the speed is now changed to 80 rpm, what will be its new vertical height in mm?

Solution:

Consider a slider-crank mechanism rotating at 20 rad/s. The crank radius is 0.1 m. Find the velocity (in m/s) of the piston when the crank is at 90 degrees to the piston direction.

Solution:

What is the ratio of the height of a porter governor to the height of a Watt governor, when they have equal arm and link lengths, where m is the mass of the ball and M is the mass of the sleeve?

Solution:

An Oldham Coupling is used to connect two parallel shafts that are 20 mm apart. The driving shaft speed is 150 rpm. Find the maximum sliding velocity of the tongue of the intermediate piece along the groove.

Solution:

A flywheel of mass 150 kg is given a spin of 50 rpm about its horizontal axis. If the whole assembly rotates about a vertical axis at 3 rad/s, the gyroscopic couple experienced will be ________. Given that the radius of gyration of the flywheel is 1 m.

Solution:

The rotor of a ship rotates in a clockwise direction when viewed from the stern, and the ship takes a left turn. The effect of the gyroscopic couple acting on it will be:

Solution:

The turbine rotor of the ship has a mass of 2500 kg and it rotates at 1200 rpm clockwise when viewed from the aft. The radius of gyration of the rotor is 300 mm. The gyroscopic couple, if the ship turns right at a radius of 250 mm with a speed of 30 km/h, is:

Solution:

Solution:

Related Question Sets:

Related Topics:

A flywheel of mass 150 kg is given a spin of 50 rpm about its horizontal axis. If the whole assembly rotates about a vertical axis at 3 rad/s, the gyroscopic couple experienced will be ________.

Given that the radius of gyration of the flywheel is 1 m.