6241. Low specific speed of a pump implies that, it is a/an __________ pump.
Axial flow
Centrifugal
Mixed flow
None of these
✅ The correct answer is option B.
Chemical Engineering
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6242. In a free vortex, the
Velocity changes linearly with radial distance
Flow is necessarily rotational
Radial component of velocity is same everywhere
Stream lines are not circular
✅ The correct answer is option A.
6243. As the velocity V and thus the Reynolds number of a flow past a sphere increases from very low value, the drag force for Re << 1
Increases linearly with V
Decreases linearly with V
Decreases as V²
None of these
✅ The correct answer is option A.
6244. Delivery of insufficient quantity of liquid by a pump may be caused by
Air leak in the inlet
Low rpm
Too high a lift
All of the above
✅ The correct answer is option D.
6245. Boiler feed water pump is usually a __________ pump.
Reciprocating
Gear
Multistage centrifugal
Diaphragm
✅ The correct answer is option C.
6246. The continuity equation in ideal fluid flow states that
Net rate of inflow into any small volume must be zero
Energy is not constant along a streamline
Energy is constant along a streamline
There exists a velocity potential
✅ The correct answer is option A.
6247. Velocity at a certain point in case of streamline flow is
Constant
Independent of time
Both A & B
Neither A nor B
✅ The correct answer is option C.
6248. Which of the following quantities are computed by using the hydraulic radius for non-circular ducts?
Velocity and relative roughness
Head loss and velocity
Reynold number, relative roughness and head loss
Reynolds number and friction factor
✅ The correct answer is option C.
6249. Sewage sludge is an example of the __________ fluid.
Bingham plastic
Newtonion
Pseudoplastic
Dilatent
✅ The correct answer is option A.