Q.1
Discharge of a centrifugal pump is
Q.2
The ratio of absolute viscosity to mass density is known as
Q.3
The velocity at which the flow changes from laminar flow to turbulent flow is called
Q.4
Which type of the pump is different from others in the same group?
Q.5
Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)
Q.6
An average value of coefficient of velocity is
Q.7
Cavitation will begin when
Q.8
The coefficient of discharge for an external mouthpiece is
Q.9
A flow through an expanding tube at constant rate is called
Q.10
An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity)
Q.11
The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to
Q.12
The intensity of pressure on an immersed surface __________ with the increase in depth.
Q.13
The efficiency of a Pelton wheel working under constant head ________ with the increase in power.
Q.14
The discharge through a channel of trapezoidal section is maximum when
Q.15
Coefficient of contraction is the ratio of
Q.16
The most efficient section of a channel is
Q.17
The static head of a centrifugal pump is equal to the _________ of suction head and delivery head.
Q.18
The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.
Q.19
A Piezometer tube is used only for measuring
Q.20
According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)
Q.21
The ratio of the normal force of jet of water on a plate inclined at an angle of 30° as compared to that when the plate is normal to jet, is
Q.22
The bulk modulus of elasticity
Q.23
Gradually varied flow is
Q.24
Which of the following pump is generally used to pump highly viscous fluid?
Q.25
A hydraulic accumulator is a device used to store _________ energy which may be supplied to a machine later on.
Q.26
A hydraulic accumulator normally consists of
Q.27
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by
Q.28
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a rectangular notch is given by
Q.29
According to Bernoulli's equation
Q.30
Which of the following instruments is used to measure flow on the application of Bernoulli's theorem?
Q.31
Ratio of inertia force to surface Jension is known as
Q.32
When the flow in an open channel is gradually varied, the flow is said to be
Q.33
Barometer is used to measure
Q.34
When the flow parameters at any given instant remain same at every point, then flow is said to be
Q.35
The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by
Q.36
According to fan laws, at constant speed and capacity, the pressure and power vary
Q.37
The height of a water column equivalent to a pressure of 0.15 MPa is
Q.38
The atmospheric pressure with rise in altitude decreases
Q.39
An ideal flow of any fluid must satisfy
Q.40
In an immersed body, centre of pressure is
Q.41
The undershot water wheels are those in which
Q.42
Multistage centrifugal pumps are used to obtain
Q.43
A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is
Q.44
An impulse turbine is used for
Q.45
The power developed by a turbine is (where H = Head of water under which the turbine is working)
Q.46
The flow ratio in case of Francis turbine varies from
Q.47
The speed ratio in case of Francis turbine varies from
Q.48
Francis, Kaplan and propeller turbines fall under the category of
Q.49
Which of the following pump is successfully used for lifting water to the boilers?
Q.50
The value of mass density in kg-sec-V-m⁴ for water at 0°C is
0 h : 0 m : 1 s