Mechanical Engineering

Question: According to Darcy’s formula, the loss of head due to friction in the pipe is (where f = Darcy’s coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe)
[A].

[B].

[C].

[D].

Answer: Option A

Explanation:

No answer description available for this question.

Question: In a free nappe,
[A].

the pressure below the nappe is atmospheric

[B].

the pressure below the nappe is negative

[C].

the pressure above the nappe is atmospheric

[D].

the pressure above the nappe is negative

Answer: Option A

Explanation:

No answer description available for this question.

Question: A weir, generally, used as a spillway of a dam is
[A].

narrow crested weir

[B].

broad crested weir

[C].

Ogee weir

[D].

submerged weir

Answer: Option C

Explanation:

No answer description available for this question.

Question: In a sharp-crested weir, the thickness of the weir is kept less than half of the height of water above the crest of the weir.
[A].

True

[B].

False

Answer: Option A

Explanation:

No answer description available for this question.

Question: A weir is said to be broad crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.
[A].

equal to.

[B].

less than

[C].

more than

Answer: Option C

Explanation:

No answer description available for this question.

Question: A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.
[A].

equal to

[B].

less than

[C].

more than

Answer: Option B

Explanation:

No answer description available for this question.

Question: According to Bazin, the coefficient of discharge varies with the height of water over the sill of a weir.
[A].

Correct

[B].

Incorrect

Answer: Option A

Explanation:

No answer description available for this question.

Question: According to Bazin’s formula, the discharge over a rectangular weir is mL2g x H3/2 where m is equal to
[A].

[B].

[C].

[D].

Answer: Option A

Explanation:

No answer description available for this question.

Question: According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)
[A].

Cd(L – nH)2gH

[B].

Cd(L – 0.1nH)2gH3/2

[C].

Cd(L – nH)2gH2

[D].

Cd(L – 0.2nH)2gH5/2

Answer: Option B

Explanation:

No answer description available for this question.