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)

The effort of a Porter governor is equal to (where c = Percentage increase in speed, m = Mass of ball and M = Mass on the sleeve)

A

$${\text{c}}\left( {{\text{m}} - {\text{M}}} \right){\text{g}}$$

B

$${\text{c}}\left( {{\text{m}} + {\text{M}}} \right){\text{g}}$$

C

$$\frac{{\text{c}}}{{\left( {{\text{m}} + {\text{M}}} \right){\text{g}}}}$$

D

$$\frac{{\text{c}}}{{\left( {{\text{m}} - {\text{M}}} \right){\text{g}}}}$$

When the sleeve of a Porter governor moves upwards, the governor speed

A

increases

B

decreases

C

remains unaffected

D

none of the mentioned

When the sleeve of a Porter governor moves downwards, the governor speed

A

increases

B

decreases

C

remains unaffected

D

first increases and then decreases

In designing a sleeve coupling, length of the sleeve is taken as (where d = Diameter of the shaft)

A

d + 17 mm

B

2d + 13 mm

C

2d + 20 mm

D

3.5 d

In designing a sleeve coupling, outer diameter of the sleeve is taken as (where d = Diameter of the shaft)

A

d + 17 mm

B

2d + 13 mm

C

2d + 20 mm

D

3.5d

A sport goods store ordered an equal number of white and yellow tennis balls. The tennis ball company delivered 30 extra tennis ball, making the ratio of white balls to yellow balls 6:5, How many tennis ball did the sport goods store originally order?

A

150

B

180

C

300

D

330

For achieving maximum capacity of the ball mill, the ball charge should be equal to about __________ percent of the ball mill volume.

A

10

B

25

C

50

D

75

If the opposite links of a four bar linkage are equal, the links will always form a

A

Triangle

B

Rectangle

C

Parallelogram

D

Pentagon

The power of a Porter governor is equal to

A

c2/1 + 2c (m + M)gh

B

2c2/1 + 2c (m + M)gh

C

3c2/1 + 2c (m + M)gh

D

4c2/1 + 2c (m + M)gh

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

A

governor A is more sensitive than governor B

B

governor B is more sensitive than governor A

C

both governors A and B are equally sensitive

D

none of the mentioned

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)

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