21.
How many jobs were supported by the U.S. wind power industry in 2018?5
A
5000
B
114000
C
36000
D
73000
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How many jobs were supported by the U.S. wind power industry in 2018?5
5000
114000
36000
73000
How many different components does it take to build a utility-scale wind turbine?
More than 800
More than 80
More than 8,000
More than 80,000
How many blades does a modern wind turbine have?
2
3
4
5
Global winds towards westernly direction are known as
Trade winds
Western winds
Eastern winds
None of the above
Global Cold wind move from
Polar to equatorial region
Equatorial to polar region
Equatorial to oceanic region
Oceanic to Equatorial region
Global Cold wind generated from Oceans moves to
Mountains
Equator
Plain areas
Poles
By how much has the price of American wind power decreased since the 1980s?
60 percent
90 percent
80 percent
70 percent
At gradient height the shear force is
Zero
Minimum
Maximum
None of the above
Air layer from 100m that extends up to the gradient height is known as
Surface layer
Ekman layer
Boundary layer
None of the above
Which force is responsible for forcing the global winds towards westernly direction
Coriolis
Gravitational
Centripetal
Centrifugal
Why a small liquid drop is in spherical shape?
due to surface tension
due to low viscosity
due to hydrogen bonding
due to low density
Which of the following is correct about Surface Tension?
It is a scalar quantity
It is a molecular phenomenon
Its root cause is the electromagnetic forces
All of the above
Which of the following is an application of surface tension?
Use of soaps and detergents as cleansing agents
Molecular structure can be elucidated by surface tension measurements through parachor values
Surfactants are incorporated in preparations like toothpaste
All of the mentioned
Which of the following factors affect the Surface Tension?
Nature of liquid
Area of Surface
Both a and b
None of the above
Which is the effect of increase in the temperature on the surface tension of the liquid?
it decreases
it increases
it remains the same
None of the above
Which is correct about the height of a capillary column of a liquid, at a particular temperature, as per Jurin's law?
equal to the diameter of the tube
directly proportional to the diameter of the tube
inversely proportional to the diameter of the tube
half of the diameter of the tube
When will the height of water in capillary tube be minimum?
When water temperature is 0 degree C
When water temperature is 4 degree C
When water temperature is -4 degree C
None of the above
When impurity is added to a liquid, its surface tension
decreases
first decreases and then
increases increases
remains same
What will be the change in the height of water in a capillary tube in stationary condition on earth if the same tube is taken in a lift going downward with acceleration?
height increases
height decreases
Remains same
can decrease or increase
What is the shape of meniscus when angle of contact is greater than 90 degree?
Concave
Convex
Plane
None of the above