Q.1
The ratio of absolute viscosity to mass density is known as
Q.2
In order that flow takes place between two points in a pipeline, the differential pressure between these points must be more than
Q.3
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.4
If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be
Q.5
The bulk modulus of elasticity
Q.6
Gradually varied flow is
Q.7
An open tank contains 1 m deep water with 50 cm depth of oil of specific gravity 0.8 above it. The intensity of pressure at the bottom of tank will be
Q.8
If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be
Q.9
The hydraulic grade line is
Q.10
During the opening of a valve in a pipe line, the flow is
Q.11
Which of the following has highest coefficient of discharge ?
Q.12
A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is
Q.13
A balloon lifting in air follows the following principle
Q.14
Choose the wrong statement
Q.15
In a forced vortex motion, the velocity of flow is
Q.16
In a free vortex motion, the radial component of velocity everywhere is
Q.17
A fluid in equilibrium can’t sustain
Q.18
The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to
Q.19
Reynolds number is significant in
Q.20
Mach number is significant in
Q.21
Stanton diagram is a
Q.22
A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, then
i) the ball will move to the front
ii) the bubble will move to the front
iii) the ball will move to the rear
iv) the bubble will move to the rear
Find out which of the above statements are correct ?
Q.23
In steady flow of a fluid, the total accele ration of any fluid particle
Q.24
When the flow parameters at any given instant remain same at every point, then flow is said to be
Q.25
The atmospheric pressure with rise in altitude decreases
Q.26
If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy is
Q.27
With the same cross-sectional area and immersed in same turbulent flow, the largest total drag will be on
Q.28
A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury?
Q.29
The viscosity of a gas
Q.30
A fluid of kinematic viscosity 0.4 cm²/sec flows through a 8 cm diameter pipe. The maximum velocity for laminar flow will be
0 h : 0 m : 1 s