Explore topic-wise MCQs in Graduate Aptitude Test (GATE).

This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Graduate Aptitude Test (GATE) knowledge and support exam preparation. Choose a topic below to get started.

1.

The loss of head due to friction in a pipe of uniform diameter in which a viscous flow is taking place, is (where RN = Reynold number)
A. 1/RN
B. 4/RN
C. 16/RN
D. 64/RN
Answer» D. 64/RN
Discussion
2.

In a venturimeter, the velocity of liquid at throat is __________ than at inlet.

A. higher
B. lower
Answer» B. lower
Discussion
3.

The maximum discharge over a broad crested weir is

A. 0.384 Cd x L x H1/2
B. 0.384 Cd x L x H3/2
C. 1.71 Cd x L x H1/2
D. 1.71 Cd x L x H3/2
Answer» E.
Discussion
4.

 

In order to measure the flow with a venturimeter, it is installed in

A. horizontal line
B. inclined line with flow upwards
C. inclined line with flow downwards
D. any direction and in any location
Answer» E.
Discussion
5.

 

Coefficient of resistance is the ratio of

A. actual velocity of jet at vena contracta to the theoretical velocity
B. area of jet at vena contracta to the area of orifice
C. loss of head in the orifice to the head of water available at the exit of the orifice
D. actual discharge through an orifice to the dieoretical discharge
Answer» D. actual discharge through an orifice to the dieoretical discharge
Discussion
6.

According to equation of continuity,
A. w1a1 = w2a2
B. w1v1 = w2v2
C. a1v1 = a2v2
D. a1/v1 = a2/v2
Answer» D. a1/v1 = a2/v2
Discussion
7.

When a tube of smaller diameter is dipped in water, the water rises in the tube due to viscosity of water.
A. True
B. False
Answer» C.
Discussion
8.

The Reynold's number of a ship is __________ to its velocity and length.
A. directly proportional
B. inversely proportional
Answer» B. inversely proportional
Discussion
9.

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» B. the pressure below the nappe is negative
Discussion
10.

Coefficient of contraction is the ratio of
A. actual velocity of jet at vena contracta to the theoretical velocity
B. loss of head in the orifice to the head of water available at the exit of the orifice
C. actual discharge through an orifice to the theoretical discharge
D. area of jet at vena contracta to the area of orifice
Answer» E.
Discussion
11.

 

An error of 1% in measuring head over the apex of the notch (H) will produce an error of __________ in discharge over a triangular notch.

A. 1%
B. 1.5%
C. 2%
D. 2.5%
Answer» E.
Discussion
12.

A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall per unit length is (where w = Specific weight of liquid, and H = Height of liquid)

A. wH
B. wH/2
C. wH2/2
D. wH2/3
Answer» D. wH2/3
Discussion
13.

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» D.
Discussion
14.

The kinematic viscosity is the

A. ratio of absolute viscosity to the density of the liquid
B. ratio of density of the liquid to the absolute viscosity
C. product of absolute viscosity and density of the liquid
D. product of absolute viscosity and mass of the liquid
Answer» B. ratio of density of the liquid to the absolute viscosity
Discussion
15.

In one dimensional flow, the flow

A. is steady and uniform
B. takes place in straight line
C. takes place in curve
D. takes place in one direction
Answer» C. takes place in curve
Discussion
16.

In a depressed 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» C. the pressure above the nappe is atmospheric
Discussion
17.

The value of bulk modulus of a fluid is required to determine
A. Reynolds number
B. Froudes number
C. Mach number
D. Eulers number
Answer» D. Eulers number
Discussion
18.

One litre of water occupies a volume of

A. 100 cm3
B. 250 cm3
C. 500 cm3
D. 1000 cm3
Answer» E.
Discussion