Fundamentals of Mechanical Engineering ❤️
Whose part load efficiency is more
The answer to this poll is
1 Rankine Cycle- Rankine's part load effiviency is higher than Brayton's cycle.
But Brayton's mechanical efficiency is higher than Rankine cycle.
1 Rankine Cycle- Rankine's part load effiviency is higher than Brayton's cycle.
But Brayton's mechanical efficiency is higher than Rankine cycle.
For a body completely submerged for stability which condition should satisfy
Anonymous Poll
3%
1 M=B
14%
2 B=G
66%
3 B above G
7%
4 G above B
11%
2 Both 1 and 2
Fundamentals of Mechanical Engineering ❤️
For a body completely submerged for stability which condition should satisfy
The answer to this poll is
3 B above G
For completely submerged to have stability B should be above G.
3 B above G
For completely submerged to have stability B should be above G.
A cold liquid is stored in spherical vessel in order to
Anonymous Poll
49%
1 Reduce rate of heat transfer
32%
2 Increase rate of heat transfer
13%
3 Prevent the liquid from freezing
6%
4 None of these
Fundamentals of Mechanical Engineering ❤️
A cold liquid is stored in spherical vessel in order to
The answer to this poll is
1 Reduce rate of heat transfer- If there had been no vessel, heat from surrounding would easily penetrate and rose the temperature of the fluid.
1 Reduce rate of heat transfer- If there had been no vessel, heat from surrounding would easily penetrate and rose the temperature of the fluid.
At which condition effectiveness of fin will be more
Anonymous Poll
32%
1 When you are riding bike at maximum speed.
42%
2 When you are riding bike slowly.
26%
3 Speed will not affect effectiveness
Fundamentals of Mechanical Engineering ❤️
At which condition effectiveness of fin will be more
The answer to this poll is
2 When you are riding bike slowly - Because effectiveness is inversely proportional to square root of convection heat transfer coefficient.
As we know h depends on Velocity so less velocity means less h value and hence more effectiveness.
2 When you are riding bike slowly - Because effectiveness is inversely proportional to square root of convection heat transfer coefficient.
As we know h depends on Velocity so less velocity means less h value and hence more effectiveness.
Fundamentals of Mechanical Engineering ❤️
Velocity of sound will be greater in winter than in summer
The answer to this poll is
2 False - Speed of sound is directly proportional to square root of temperature. So speed of sound will be more in summer.
2 False - Speed of sound is directly proportional to square root of temperature. So speed of sound will be more in summer.
Effect of friction at sleeve will make the governor
Anonymous Poll
23%
1 Sensitive
56%
2 Insensitive
13%
3 Isochronous
8%
4 Tend to hunt more
A transmission shaft subjected to bending loads must be designed on the basis of
Anonymous Poll
12%
1 Rankine Theory
29%
2 Tresca Theory
8%
3 Haigh's Theory
51%
4 Fatigue Strength
Fundamentals of Mechanical Engineering ❤️
Effect of friction at sleeve will make the governor
The answer to this poll is
2 Insensitive- Friction always acts opposite to the motion of sleeve and sensitivity will be more if there is more displacement of sleeve for a given change of speed. Hence friction opposes the motion so we can say that it makes it more insensitive.
2 Insensitive- Friction always acts opposite to the motion of sleeve and sensitivity will be more if there is more displacement of sleeve for a given change of speed. Hence friction opposes the motion so we can say that it makes it more insensitive.
Fundamentals of Mechanical Engineering ❤️
A transmission shaft subjected to bending loads must be designed on the basis of
The answer to this poll is
4 Fatigue Strenth- Transmission shafts are subjected to reverse bending, suppose if one only considers Torque transmission and desin it by Tresca then the designing stress/allowable stress can fail the material because in fatigue failure occurs below yield point, hence we design by Fatigue strength.
4 Fatigue Strenth- Transmission shafts are subjected to reverse bending, suppose if one only considers Torque transmission and desin it by Tresca then the designing stress/allowable stress can fail the material because in fatigue failure occurs below yield point, hence we design by Fatigue strength.
By increasing cutting velocity of the tool in orthogonal machining Cutting Force
Anonymous Poll
29%
1 Increases
31%
2 Decreases
40%
3 No effect
Fundamentals of Mechanical Engineering ❤️
By increasing cutting velocity of the tool in orthogonal machining Cutting Force
The answer to this poll is
3 No effect- There is no effect of velocity on cutting force.
3 No effect- There is no effect of velocity on cutting force.
During punching without the use of flywheel the speed of the motor
Anonymous Poll
38%
1 Remains same
49%
2 Decreases
13%
3 Increases
Fundamentals of Mechanical Engineering ❤️
During punching without the use of flywheel the speed of the motor
The answer to this poll is
2 Decreases- Because the punch experiences resisting shera force which decreases its spedd that is why we use flywheel.
2 Decreases- Because the punch experiences resisting shera force which decreases its spedd that is why we use flywheel.
Stream functiom is definable if a valid velocity potential function exists.
Anonymous Poll
69%
1 True
31%
2 False