MCQ 1 One litre of water occupies a volume of

(A) 100 cm³ (B) 250 cm³ (C) 500 cm³ (D) 1000 cm³

MCQ 2 The value of bulk modulus of a fluid is required to determine

(A) Mach number (B) Reynold's number (C) Euler's number (D) Froude's number

MCQ 3 In a depressed nappe

(A) the pressure above the nappe is negative (B) the pressure above the nappe is atmospheric (C) the pressure below the nappe is atmospheric (D) the pressure below the nappe is negative

MCQ 4 In one dimensional flow, the flow

(A) is steady and uniform (B) takes place in one direction (C) takes place in curve (D) takes place in straight line

MCQ 5 The kinematic viscosity is the

(A) ratio of absolute viscosity to the density of the liquid (B) product of absolute viscosity and mass of the liquid (C) ratio of density of the liquid to the absolute viscosity (D) product of absolute viscosity and density of the liquid

MCQ 6 Which of the following is an example of laminar flow?

(A) Under ground flow (B) Flow past tiny bodies (C) Flow of oil in measuring instruments (D) All of these

MCQ 7 The discharge over a right angled notch is (where H = Height of liquid above the apex of notch)

(A) C_d 2g × H (B)  C_d 2g × H^3/2 (C)  C_d 2g × H² (D)  C_d 2g × H^5/2

MCQ 8 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 (D) None of these

MCQ 9 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

MCQ 10 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 %

MCQ 11 The pressure less than atmospheric pressure is known as

(A) suction pressure (B) vacuum pressure (C) negative gauge pressure (D) All of these

MCQ 12 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 contract a to the area of orifice

MCQ 13 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

MCQ 14 The Reynold's number of a ship is __________ to its velocity and length.

(A) directly proportional (B) inversely proportional (C) both A and B (D) None of these

MCQ 15 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 (C) Cant say (D) None of these

MCQ 16 According to equation of continuity,

(A) w₁a₁ = w₂a₂ (B) w₁v₁ = w₂v₂ (C) a₁v₁ = a₂v₂ (D) a₁/v₁ = a₂/v₂

MCQ 17 Coefficient of resistance is the ratio of

(A) actual discharge through an orifice to the dieoretical discharge (B) loss of head in the orifice to the head of water available at the exit of the orifice (C) area of jet at vena contracta to the area of orifice (D) actual velocity of jet at vena contracta to the theoretical velocity

MCQ 18 The total energy line lies over the hydraulic gradient line by an amount equal to the

(A) pressure head + velocity head (B) pressure head (C) pressure head − velocity head (D) velocity head

MCQ 19 In order to measure the flow with a venturimeter, it is installed in

(A) inclined line with flow downwards (B) any direction and in any location (C) inclined line with flow upwards (D) horizontal line

MCQ 20 The discharge through a large rectangular orifice is given by (where H₁ = Height of the liquid above the top of the orifice, H₂ = Height of the liquid above the bottom of the orifice, b = Breadth of the orifice, and C_d = Coefficient of discharge)

(A) Q =  C_d × b₂g (H₂ − H₁) (B) Q =  C_d × b₂g (H₂^1/2 − H₁^1/2) (C) Q =  C_d × b₂g (H₂^3/2 − H₁^3/2) (D) Q =  C_d × b₂g (H₂² − H₁²)

MCQ 21 The discharge over a rectangular notch is (where b = Width of notch, and H = Height of liquid, above the sill of the notch)

(A)  C_d × b₂gH (B)  C_d × b₂g × H (C)  C_d × b₂g × H^3/2 (D)  C_d × b₂g × H²

MCQ 22 The discharge through a siphon spillway is

(A) C_d × a²g × H^5/2 (B) C_d × a²g × H² (C) C_d × a²g × H^3/2 (D) C_d × a²gH

MCQ 23 The maximum discharge over a broad crested weir is

(A) 0.384 C_d × L × H^1/2 (B) 0.384 C_d × L × H^3/2 (C) 1.71 C_d × L × H^1/2 (D) 1.71 C_d × L × H^3/2

MCQ 24 In a venturimeter, the velocity of liquid at throat is __________ than at inlet.

(A) higher (B) lower (C) medium (D) None of these

MCQ 25 The loss of head due to friction in a pipe of uniform diameter in which a viscous flow is taking place, is (where R_N = Reynold number)

(A) 1/R_N (B) 4/R_N (C) 16/R_N (D) 64/R_N