Q.1
A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is
Q.2
The horizontal component of force on a curved surface is equal to the
Q.3
The distance from pipe boundary, at which the turbulent shear stress is one-third die wall shear stress, is (where R is the radius of pipe)
Q.4
For measuring flow by a venturimeter, if should be installed in
Q.5
Which of the following instrument can be used for measuring speed of an aeroplane
Q.6
The increase in meta centric height
i) increases stability
ii) decreases stability
iii) increases comfort for passengers
iv) decreases comfort for passengers
The correct answer is
Q.7
Select the correct statement
Q.8
Least possible value of correction factor for
i) kinetic energy is zero
ii) kinetic energy is 1
iii) momentum is zero
iv) momentum is 1
The correct statements are
Q.9
The discharge over a broad crested weir is maximum when the depth of flow is (where H is the available head)
Q.10
The line of action of the buoyant force acts through the centroid of the
Q.11
Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is
Q.12
The flow in which conditions do not change with time at any point, is known as
Q.13
The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as
Q.14
The fluid forces considered in the Navier Stokes equation are
Q.15
The tendency of a liquid surface to contract is due to the following property
Q.16
The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as
Q.17
When time of closure tc = L/v0 (where L is length of pipe and v0 is speed of pressure wave), the portion of pipe length subjected to maximum head is
Q.18
Cavitation will begin when
Q.19
Pascal-second is the unit of
Q.20
Which of the following statements is correct?
Q.21
Centre of pressure compared to e.g. is
Q.22
If the dynamic viscosity of a fluid is 0.5 poise and specific gravity is 0.5, then the kinematic viscosity of that fluid in stokes is
Q.23
An ideal flow of any fluid must satisfy
Q.24
If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm”, the pressure at a depth of 50 m below the oil surface will be
Q.25
The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm”. The pressure at 2.5 m below the oil surface will be
Q.26
In case of an airfoil, the separation of flow occurs
Q.27
The property of fluid by virtue of which it offers resistance to shear is called
Q.28
Falling drops of water become spheres due to the property of
Q.29
Which of the following is the unit of kinematic viscosity
Q.30
Ratio of inertia force to surface Jension is known as
0 h : 0 m : 1 s