301. The speed of a sound wave in a gas is analogous to the speed of
An elementary wave in an open channel
Flow in an open channel
A disturbance travelling upstream in moving fluid
None of these
✅ The correct answer is option A.
Fluid Mechanics MCQs
302. A pressure head of 320 metres of water in meters of CCl₄ (sp.gr = 1.6) will be
100
200
320
160
✅ The correct answer is option B.
303. The pitot static tube does not measure the __________ pressure.
Static
Total
Difference in static & dynamic
All of the above
✅ The correct answer is option D.
304. Differential manometer measures the
Atmospheric pressure
Sub-atmospheric pressure
Pressure difference between two points
None of these
✅ The correct answer is option C.
305. If ‘x’ is the depth of flow in an open channel of large width, then the hydraulic radius is equal to
x
x/2
x/3
2x/3
✅ The correct answer is option A.
306. Drag force on the float of a rotameter is(where Q = flow rate of the )
∝Q
∝√Q
∝Q²
Constant
✅ The correct answer is option D.
307. Non-colloidal solution is an example of the __________ fluid.
Non-Newtonion
Newtonion
Dilatent
Pseudoplastic
✅ The correct answer is option B.
308. Rise of liquid in a capillary tube is due to
Cohesion
Adhesion
Both A & B
Neither A nor B
✅ The correct answer is option C.
309. With increase in the ratio of orifice diameter to pipe diameter in case of an orificemeter, the overall pressure loss
Decreases
Increases
Remains constant
Increases linearly
✅ The correct answer is option C.
310. The curve of metacentre for a floating body __________ the curve of buoyancy.
Is always below
Is the evolute of
Intersects at right angle
Is tangential to
✅ The correct answer is option B.