Q.1
Kinematic similarity is said to exist between the model and the prototype, if both of them
Q.2
The Francis formula for the discharge over Cipoletti weir is
Q.3
Manometer is used to measure
Q.4
Dynamic similarity is said to exist between the model and the prototype, if both of them
Q.5
A Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is
Q.6
Bulk modulus of a fluid is the ratio of
Q.7
The viscosity of a liquid __________ its rate of flow through a hole in a vessel.
Q.8
A uniform body 3 m long, 2 m wide and 1 m deep floats in water. If the depth of immersion is 0.6 m, then the weight of the body is
Q.9
Discharge of a centrifugal pump is (where N = Speed of the pump impeller)
Q.10
Guide angle as per the aerofoil theory of Kaplan turbine blade design is defined as the angle between
Q.11
Which of the following hydraulic unit is used for transmitting increased or decreased torque to the driven shaft?
Q.12
The hydraulic efficiency of an impulse turbine is maximum when velocity of wheel is _______ of the jet velocity,
Q.13
In a forced vortex, the velocity of flow everywhere within the fluid is
Q.14
The maximum efficiency of transmission through a pipe is
Q.15
Theoretical power required (in watts) to drive a reciprocating pump is (where w = Specific weight of liquid to be pumped in N/m3, Q = Discharge of the pump in m3/s, Hs = Suction head in meters, and Hd = Delivery head in meters)
Q.16
For starting an axial flow pump, its delivery valve should be
Q.17
Maximum impulse will be developed in hydraulic ram when
Q.18
The force exerted by a jet of water (in a direction normal to flow) impinging on a fixed plate inclined at an angle θ with the jet is
Q.19
According to fan laws, for the fans having constant wheel diameters, the power demand varies
Q.20
The number of buckets on the periphery of a Pelton wheel is given by
Q.21
The pressure at a point in a fluid will not be same in all the directions when the fluid is
Q.22
When a body is placed over a liquid, it will sink down if
Q.23
The kinematic viscosity of an oil (in stokes) whose specific gravity is 0.95 and viscosity 0.011 poise, is
Q.24
A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal to
Q.25
Specific weight of water in S.I. units is equal to
Q.26
The specific weight of water in S.I. units is taken as
Q.27
A flow is called super-sonic if the
Q.28
One liter of water occupies a volume of
Q.29
The variation in the volume of a liquid with the variation of pressure is called its
Q.30
The unit of surface tension is
Q.31
Unit of surface tension is
Q.32
Hydrometer is used to determine
Q.33
The units of dynamic or absolute viscosity are
Q.34
In a short cylindrical external mouthpiece, the vena contracta occurs at a distance __________ the diameter of the orifice from the outlet of orifice.
Q.35
The total pressure on the top of a closed cylindrical vessel of radius (r) completely filled up with liquid of specific weight (w) and rotating at (ω) rad/s about its vertical axis, is
Q.36
Which of the following instrument can be used for measuring speed of a submarine moving in deep sea?
Q.37
A pressure of 25 m of head of water is equal to
Q.38
In a centrifugal pump casing, the flow of water leaving the
Q.39
When a plate is immersed in a liquid parallel to the flow, it will be subjected to a pressure __________ that if the same plate is immersed perpendicular to the flow.
Q.40
For similarity, in addition to models being geometrically similar to prototype, the following in both cases should also be equal
Q.41
Low specific speed of a pump implies it is
Q.42
Medium specific speed of a pump implies it is
Q.43
High specific speed of a pump implies it is
Q.44
The unit speed of the turbine runner is
Q.45
The speed of a turbine runner is
Q.46
The shear stress between the two liquid layers is __________ proportional to the distance between two layers.
Q.47
According to fan laws, at constant pressure, the speed capacity and power vary
Q.48
The force exerted (in Newton) by a jet of water impinging normally on a fixed plate is (where w = Specific weight of water in N/m3, a = Cross-sectional area of jet in m², and V = Velocity of jet in m/s)
Q.49
Density of water is maximum at
Q.50
The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be
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