Hydraulics Mock test – 4 || Civil Engineering Mock tests Welcome to your Hydraulics & Fluid Mechanics Mock test - 4 Take an exciting test in Hydraulics/Fluid Mechanics You have only 20 mins to complete the test (25 Questions) Wish you all the best!!! Name Email 1) The coefficient of discharge in case of internal mouthpiece is __________ that of external mouthpiece. (A) Less than (B) More than (C) Equal to (D) None of these2) Barometer is used to measure (A) Velocity of liquid (B) Atmospheric pressure (C) Pressure in pipes and channels (D) Difference of pressure between two points in a pipe3) The value of coefficient of discharge is __________ the value of coefficient of velocity. (A) Less than (B) Same as (C) More than (D) None of these4) The weight per unit volume of a liquid at a standard temperature and pressure is called (A) Specific weight (B) Mass density (C) Specific gravity (D) None of these5) An error of 1% in measuring head over the crest 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 %6) The viscosity of a liquid __________ its rate of flow through a hole in a vessel. (A) Effects (B) Does not effect (C) Both A and B (D) None of these7) The specific gravity of water is taken as (A) 0.001 (B) 0.01 (C) 0.1 (D) 18) The hydraulic mean depth or the hydraulic radius is the ratio of (A) Area of flow and wetted perimeter (B) Wetted perimeter and diameter of pipe (C) Velocity of flow and area of flow (D) None of these9) The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a rectangular notch is given by (A) dQ/Q = (1/2) × (dH/H) (B) dQ/Q = (3/4) × (dH/H) (C) dQ/Q = (dH/H) (D) dQ/Q = (3/2) × (dH/H)10) A flow in which the quantity of liquid flowing per second is not constant, is called (A) Streamline flow (B) Turbulent flow (C) Steady flow (D) Unsteady flow11) A flow in which the viscosity of fluid is dominating over the inertia force is called (A) Steady flow (B) Unsteady flow (C) Laminar flow (D) Turbulent flow12) A flow whose streamline is represented by a curve, is called (A) One-dimensional flow (B) Two-dimensional flow (C) Three-dimensional flow (D) Four-dimensional flow13) The unit of surface tension is (A) N/m (B) N/m2 (C) N/m3 (D) N-m14) Euler's number is the ratio of __________ force to pressure force. (A) Inertia (B) Gravity (C) Viscous (D) None of these15) The efficiency of power transmission through pipe is (where H = Total supply head, and hf = Head lost due to friction in the pipe) (A) (H - hf )/H (B) H/(H - hf ) (C) (H + hf )/H (D) H/(H + hf )16) If a body floating in a liquid returns back to its original position, when given a small angular displacement, the body is said to be in (A) Neutral equilibrium (B) Stable equilibrium (C) Unstable equilibrium (D) None of these17) A flow in which the volume of a fluid and its density does not change during the flow is called _________ flow. (A) Incompressible (B) Compressible (C) Viscous (D) None of these18) The coefficient of venturi-flume, generally, lies between (A) 0.3 to 0.45 (B) 0.50 to 0.75 (C) 0.75 to 0.95 (D) 0.95 to 1.019) The flow of water through the hole in the bottom of a wash basin is an example of (A) Steady flow (B) Uniform flow (C) Free vortex (D) Forced vortex20) The hydraulic mean depth for a circular pipe of diameter (d) is (A) d/6 (B) d/4 (C) d/2 (D) d21) A fluid whose viscosity does not change with the rate of deformation or shear strain is known as (A) Real fluid (B) Ideal fluid (C) Newtonian fluid (D) Non-Newtonian fluid22) The stress-strain relation of the Newtonian fluid is (A) Linear (B) Parabolic (C) Hyperbolic (D) Inverse type23) The units of dynamic or absolute viscosity are (A) Metres² per sec (B) kg sec/meter (C) Newton-sec per meter (D) Newton-sec² per meter24) A notch is used to measure __________ of liquids. (A) Pressure (B) Discharge (C) Velocity (D) Volume25) The length of the divergent cone in a Venturimeter is __________ that of the convergent cone. (A) Equal to (B) Double (C) Three to four times (D) Five to six times