Q.1
For turbulent flow of newtonion fluid in a circular cross-section pipe, the ratio of maximum to average fluid velocity is
Q.2
The ratio of the depth of flow to the diameter of the channel for maximum discharge in a circular channel in open channel flow is
Q.3
Diaphragm pumps are used to transport
Q.4
Select the correct practical example of steady non-uniform flow.
Q.5
In case of a centrifugal pump, the ratio of total delivered pressure to pressure developed with the impeller is called the __________ efficiency.
Q.6
__________ isused for measuring the static pressure exerted on the wall by a fluid flowing parallel to the wall in a pipeline.
Q.7
Paper pulp is an example of __________ fluid.
Q.8
Forces acting on a particle settling in fluid are __________ forces.
Q.9
Pick out the wrong statement.
Q.10
Higher specific speed (200-500) of a centrifugal pump indicates that the pump is of __________ flow type.
Q.11
With increase in pump speed, its NPSH requirement
Q.12
Mercury is an ideal barometric fluid mainly due to its
Q.13
The velocity profile for a Bingham plastic fluid flowing (under laminar conditions) in a pipe is
Q.14
A streamline is a line in flow field,
Q.15
Efficiency of power transmission (η) through a circular pipe is given by (ht - hf)/ht, which has a maximum value of __________ percent.
Q.16
A centrifugal pump has the following specifications:
Power = 4 H.P.; Speed = 800 rpm
Head = 8 metres
Flow = 1000 litres/minutes.
If its speed is halved, the power consumed now will be __________ hp.
Q.17
Brownian movement is prominent in the particle size range of __________ microns in case of settling of a particle in a fluid.
Q.18
Small pressure differences in liquids is measured using a/an
Q.19
The head loss in turbulent flow in pipe is proportional to(where, V = velocity of fluid through the pipe)
Q.20
For pipe flows, head is proportional to __________ at constant capacity(where, D = pipe diameter).
Q.21
Choose the correct set of dimensions of viscosity that are equivalent (where, F, M, L, T are dimensions for force, mass, length and time respectively).
Q.22
In a/an __________ , the flow rate of fluids is obtained by measuring the difference between the impact and the static pressure.
Q.23
In a stabilised soap bubble, pressure inside it compared to external pressure is
Q.24
Hot wire anemometer is used to measure the
Q.25
Pick out the wrong statement pertaining to fluid flow.
Q.26
The discharge co-efficient for an orificemeter does not depend upon the
Q.27
Bernoulli's equation accounts for the
Q.28
For steady ideal fluid flow, the Bernoulli's equation states that the
Q.29
Which of the following is not dimension-less?
Q.30
Multistage centrifugal pumps are generally used for
Q.31
A centrifugal pump has the following specifications:
Power = 4 H.P.; Speed = 800 rpm
Head = 8 metres
Flow = 1000 litres/minutes.
If its speed is halved, the new discharge will be __________ litres/minute.
Q.32
The kinetic energy correction factor for velocity distribution of laminar flow is
Q.33
The Navier-Stokes equation deals with the law of conservation of
Q.34
Remote control valve is a __________ valve.
Q.35
A centrifugal pump designed to pump water is employed to pump a more viscous oil. In the later case, the pump
Q.36
Pick out the correct statement.
Q.37
Potential flow is characterised by the
Q.38
Critical velocity in a pipe flow
Q.39
The simple pitot tube does not measure the
Q.40
All pipes of a particular nominal size have the same
Q.41
In fluid flow, the boundary layer separation can not occur
Q.42
Pick out the wrong statement.
Q.43

Pick out the correct statement pertaining to the flow through a converging-diverging tube.

  • The value of Mach number is always unity at the throat.
  • No shock wave develops in the tube when the Mach number at exit is greater than unity.
  • Throughout the converging portion of the tube, the density increases in the downstream direction.
  • none of these.
Q.44

The terminal velocity of a solid spherical particle falling through a stationary fluid mass in the Stoke's law range is proportional to the

  • inverse of fluid viscosity.
  • square of particle size.
  • difference in the densities of the particle & fluid.
  • all (a), (b) and (c).
Q.45

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
Q.46

A centrifugal pump designed to pump water is employed to pump a more viscous oil. In the later case, the pump

  • develops a lower head.
  • capacity is reduced.
  • requires more power.
  • all (a), (b) and (c).
Q.47

Which of the following conditions must be satisfied for lift force to be developed ?

  • The body should be bluff body.
  • The body should be stream lined.
  • Circulation around the body is essentially required.
  • The main stream velocity must approach the velocity of sound in that fluid medium.
Q.48

Cavitation can be prevented by

  • suitably designing the pump.
  • maintaining the suction head sufficiently greater than the vapour pressure.
  • maintaining suction head = developed head.
  • maintaining suction head lower than the vapour pressure.
Q.49

Assuming flow to be laminar, if the diameter of the pipe is halved, then the pressure drop will

  • increase
  • decrease
  • remain same
  • be quadrupled
Q.50

Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ε0) with age/time (t) (where, ε = roughness of the surface after time't'. α = a co-efficient to be experimentally determined)?

  • ε = ε0 + α.t
  • ε = ε0 + α.t2
  • ε = ε0 + α.t3
  • ε = ε0 + α.t4
0 h : 0 m : 1 s