A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used ? 1 : 2.5 1 :25 1:50 1 : 5 TRUE ANSWER : ? YOUR ANSWER : ?
A vertical rectangular plane surface is submerged in water such that its top and bottom surfaces are 1.5 m and 6.0 m res-pectively below the free surface. The position of center of pressure below the free surface will be at a distance of 4.2 M 4.0 M 4.8 M 4.6 M TRUE ANSWER : ? YOUR ANSWER : ?
Metacentric height is given as the distance between the center of gravity of the body and the center of pressure the center of gravity of the body and the center of buoyancy the center of gravity of the body andthe meta center center of buoyancy and metacentre TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following instrument can be used for measuring speed of an aeroplane Orifice plate pitot tube rotameter Venturimeter TRUE ANSWER : ? YOUR ANSWER : ?
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 (i) and (iv) (ii) and (iii) (ii) and (iv) (i) and (iii) TRUE ANSWER : ? YOUR ANSWER : ?
At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be negative value maximum could be any value minimum TRUE ANSWER : ? YOUR ANSWER : ?
The discharge through a V- notch varies as H5/2 H1/2 H5’4 where H is head. H3’2 TRUE ANSWER : ? YOUR ANSWER : ?
Normal depth in open channel flow is the depth of flow corresponding to laminar flow unsteady flow uniform flow Steady flow TRUE ANSWER : ? YOUR ANSWER : ?
Fluid is a substance that always expands until it fills any container has the same shear stress.at a point regardless of its motion cannot be subjected to shear forces cannot remain at rest under action of any shear force TRUE ANSWER : ? YOUR ANSWER : ?
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 (ii) and (iii) (i) and (iv) (i) and (iii) (ii) and (iv) TRUE ANSWER : ? YOUR ANSWER : ?