Related Questions

When the sleeve of a Porter governor moves upwards, the governor speed
A increases
B decreases
C remains unaffected
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)
A $$\frac{{\text{m}}}{{{\text{m}} + {\text{M}}}}$$
B $$\frac{{\text{M}}}{{{\text{m}} + {\text{M}}}}$$
C $$\frac{{{\text{m}} + {\text{M}}}}{{\text{m}}}$$
D $$\frac{{{\text{m}} + {\text{M}}}}{{\text{M}}}$$
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 $$\frac{{\text{c}}}{{\left( {{\text{m}} - {\text{M}}} \right){\text{g}}}}$$
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
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 distance between two stations, Dhaka and Chittagong is 450 km. A train starts at 5 pm from Dhaka and moves towards chittagong at an average speed of 60 km/hr. Another train starts from Chittagong at 4:20 pm and moves towards Dhaka at an average speed of 80 km/hr. At what time will the two trains meet?
A 6:10 pm
B 7:05 pm
C 8:15 pm
D 6: 35 pm
A truck moves at the speed of 90 km/hr after repairing and moves at the speed of 80 km/hr before repairing. It covers x distance in 8 hours after repairing. How much time (in hours) will it take to cover 4x distance before repairing?
A 48
B 40
C 36
D 28
A man standing on a edge of a cliff throws a stone vertically upwards with a certain speed. He then throws another stone downwards with the same speed. Find the ratio of the speeds of the two stones when they hit the ground.
A 1 : 1
B 1 : 2
C 1 : 4
D Cannot be found from the given information.
A Porter governor is a
A dead weight governor
B pendulum type governor
C spring loaded governor
D inertia governor

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