Fundamentals of Mechanical Engineering ❤️
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This channel will help you feel the concepts in Mechanical Engineering and will be useful for various competetive exams.
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In Psychometry chart Specific Humidity is plot on y axis and dry bulb temperature is plot on x axis. Specific humidity is a function of vapour pressure. So as we know as temperature increases vapour pressure increases whivh can be seen in Psychometric chart.

Specific humidity is calculated at a particular location and is the ratio of mass of vapour per kg of dry air.

Relative Humidity is indication of capacity of air to accomodate maximum vapor.
It is the ratio of Vapor pressure to saturated vapour pressure.

#FUNDA #RAC
As latent heat of vaporisation of a liquid decreases, boiling point will
Anonymous Poll
55%
1 Increase
28%
2 Decrease
17%
3 Remains same
Fundamentals of Mechanical Engineering ❤️
As latent heat of vaporisation of a liquid decreases, boiling point will
The answer to the above poll is



1 Increases- As we increse temperature latent heat decreases and Pressure increases.(Can be seen from narrowing of dome in a TS diagram)
Boiling point is directly proportional to pressure.
On increasing %C , Young's Modulus will
Anonymous Poll
28%
1 Increase
33%
2 Decrease
39%
3 Remains same
Fundamentals of Mechanical Engineering ❤️
On increasing %C , Young's Modulus will
The answer to the above poll is



3 Reamains same - Upto elastic limit it if we increase or decrease carbon content there is no change in slope of stress strain diagram i.e Young's modulus.
What will be the entropy of universe when a bar is stretched within elastic limit? (Assuming there is no heat transfer to the surrounding)
Anonymous Poll
62%
1 >0
13%
2 <0
25%
3 0
Fundamentals of Mechanical Engineering ❤️
What will be the entropy of universe when a bar is stretched within elastic limit? (Assuming there is no heat transfer to the surrounding)
The answer to this poll is




3 0

As we know dS=DQ/T + del(generation).
Since heat transfer to the surrounding is 0,so it depends on del(generation). And when a material is stretched within elastic limit it can be treated as reversible process, because if we remove the load it will again take its original shape.
For a 2D point to have translational motion, the Homogeneous Transformation matrix will be of order
Anonymous Poll
13%
1) 1*1
56%
2) 2*2
31%
3) 3*3
Can we apply Energy conversation when the cylinder rolls from one postion to another.
As we know for pure rolling of a material, it cannot roll when friction is absent.
Anonymous Poll
66%
1 Yes
31%
2 No
3%
3 Maybe
Fundamentals of Mechanical Engineering ❤️
Can we apply Energy conversation when the cylinder rolls from one postion to another.
As we know for pure rolling of a material, it cannot roll when friction is absent.
The answer to this poll is



1 Yes- A body cannot roll without absence of friction but the point of comtact where friction acts is static i.e in rest so static friction acts at the point of conatct.
So no energy is lost because the point is stationary, hence we can apply Energy conservation.
If you hit someone by a punch👊, in which case the person will get more hurted.
Anonymous Poll
18%
1 When you simply translate your hand and hit
82%
2 When you translate and rotate both at the same time and hit
Fundamentals of Mechanical Engineering ❤️
If you hit someone by a punch👊, in which case the person will get more hurted.
The answer to this poll is


2
Because, as we know energy is constant, so more the energy input hence more will be the output.
While translating you will Induce 1/2mv^2 and by rotating you will induce 1/2*I*(omega)^2.
So the energy absorbed by another person will be more.


Bruce Lee used to punch by this method.
Which one of the following materials will be stronger?
Anonymous Poll
72%
1 Fine Grains
28%
2 Coarse Grains
Fundamentals of Mechanical Engineering ❤️
Which one of the following materials will be stronger?
The answer to this poll is



1 Fine grains
The dislocations will find difficulty to move because as the grain size is smaller the number of grain boundaries will be higher which acts as obstacles for dislocations, so this material will be stronger than the coarse grains materials.
Profit Volume ratio is independent of fixed cost
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69%
1 True
31%
2 False
Fundamentals of Mechanical Engineering ❤️
Profit Volume ratio is independent of fixed cost
The answer to this poll is


1 True- P/V ratio indicates about how fast there is recovery of money when one unit of product is sold.
It is the ratio of (S-V) /S
It is independent of Fixed cost.
Shear Stress during Torsion of shaft doesn't depend on material of shaft.
Anonymous Poll
61%
True
39%
False