Q.1) Metacentric height for small values of angle of heel is the distance between the –
A) Centre of gravity and centre of buoyancy
B) Centre of gravity and metacentre
C) Centre of buoyancy and metacentre
D) Free surface and centre of buoyancy
Option (B)
Q.2) Stream lines and Path lines always coincide in case of :
A) Steady flow
B) Laminar flow
C) Uniform flow
D) Turbulent flow
Option (A)
Q.3) The pressure at the summit of a syphon is –
A) Equal to atmospheric
B) Less than atmospheric
C) More than atmospheric
D) None of the above
Option (B)
Q.4) In case of an airfoil, the separation of flow occurs :
A) At the extreme rear of body
B) At the extreme front of body
C) Midway between rear and front of body
D) Anywhere between rear and front of body depending upon Reynold’s number
Option (A)
Q.5) The hydraulic grade line is –
A) Always above the centre line of pipe
B) Never above the energy grade line
C) Always sloping downward in the direction of flow
D) All of the above
Option (B)
Q.6) If the speed of pressure wave is v0 and pipe length is L, rapid closure occurs when time of closure is :
A) Less than 2L/v0
B) Greater than 2L/v0
C) Less than L/v0
D) Zero
Option (A)
Q.7) The hydraulic jump always occurs from –
A) Below critical depth to above critical depth
B) Above critical depth to below critical depth
C) Below critical depth to above normal depth
D) Above normal depth to below normal depth
Option (A)
Q.8) A triangular channel section is most economical when each of its sloping sides is inclined to the vertical at an angle of :
A) 300
B) 450
C) 600
D) 750
Option (B)
Q.9) The critical state of flow through a channel section may be defined as the state of flow at which the :
A) Specific energy is maximum for a given discharge
B) Specific force is maximum for a given discharge
C) Discharge is maximum for a given specific force
D) Discharge is minimum for a given specific energy
Option (C)
Q.10) The most common device for measuring discharge through channels is :
A) Venturi flume
B) Current meter
C) Pitot tube
D) All of the above
Option (A)
Q.11) Super critical flow can occur in a :
A) Channel with mild slope
B) Channel with steep slope
C) A horizontal channel
D) All of the above
Option (D)
Q.12) Froude number is the ratio of inertia force to –
A) Viscous force
B) Surface Tension force
C) Gravity force
D) Compressive force
Option (C)
Q.13) The causes of cavitation are :
A) High suction lift and low pump speed
B) Low suction lift and high pump speed
C) High suction lift and high pump speed
D) Low suction lift and low pump speed
Option (C)
Q.14) A streamlined body is defined as a body about which –
A) The flow is laminar
B) The flow is along the streamlines
C) The flow separation is suppressed
D) The drag is zero
Option (C)
Q.15) A Bourdon gauge measures the pressure at a point relative to :
A) The standard atmospheric pressure and not relative to the absolute zero pressure
B) The absolute zero pressure and not relative to the local atmospheric pressure
C) Standard atmospheric pressure and not relative to the local atmospheric pressure
D) The local atmospheric pressure and not relative to the standard atmospheric pressure
Option (D)
Q.16) Streamlines and Equipotential lines :
A) Can be drawn graphically for viscous flow around any boundary
B) Form meshes of perfect squares
C) Are orthogonal wherever they meet
D) Can be determined mathematically for all boundary conditions
Option (C)
Q.17) In a supersonic flow, a diverging passage results in :
A) Increase in the velocity and pressure
B) Increase in the velocity and density
C) Decrease in pressure and density
D) Decrease in velocity and pressure
Option (C)
Q.18) A surge tank is provided in a hydro-power scheme to :
A) Provide additional storage close to the penstock
B) Take care of change of slope, alignment or size of the water conductor
C) Reduce the pressures under transient conditions
D) Provide convenient overspills
Option (C)
Q.19) The motion of air mass in a tornado is a :
A) Free vortex motion
B) Forced vortex motion
C) Free vortex at centre and forced vortex outside
D) Forced vortex at centre and free vortex outside
Option (D)
Q.20) Hot wire Anemometer is used to measure :
A) Discharge
B) Velocity of gas
C) Pressure intensity of gas
D) Pressure intensity of liquid
Option (B)
