Df + Bf = Wf
Df = Bf + Wf
Df + Bf + Wf =0
None of these
✅ The correct answer is option A.
Chemical Engineering MCQs
In case of venturimeters, friction losses are about __________ percent of maximum velocity head.
2
8
12
20
✅ The correct answer is option A.
For pipe flows, head is proportional to __________ at constant capacity(where, D = pipe diameter).
1/D
1/D²
1/D⁵
D²
✅ The correct answer is option C.
The fluid jet discharging from a 2″ diameter orifice has a diameter of 1.75″ at its vena-contracta. The co-efficient of contraction is
1.3
0.766
0.87
None of these
✅ The correct answer is option B.
Permanent loss in a venturimeter is about __________ percent of the pressure drop in theupstream cone.
1
10
40
70
✅ The correct answer is option B.
The __________ is measured by a piezometric opening.
Dynamic pressure
Static pressure
Total pressure
Point velocity
✅ The correct answer is option C.
In case of turbulent flow of a Newtonion fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity)
Vavg
1.2 Vavg
1.5 Vavg
1.8 Vavg
✅ The correct answer is option B.
What is the ratio of the velocity at the axis of the pipe to the mean velocity of flow in case of pipe flow under viscous condition?
0.5
0.67
1
2
✅ The correct answer is option D.
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.
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.