Download turbulent flow - SNS Courseware

1. According to the equation of continuity when water falls its
speed increases, while it’s cross sectional area
1. increases
2. decreases
3. remain same
4. different
2. If the layers of the fluid has frictional force between them then
it is known as
1. viscous
2. non-viscous
3. incompressible
4. invisid and incompressible
3. Venturi relation is one of the applications of the
1. equation of continuity
2. Bernoulli's equation
3. light equation
4. speed equation
4. The simplified equation of continuity is represented as
1. A1v1 = A2v2
2. A1v2 = A2v2
3. A1v1 = A1v2
4. A2v1 = A1v1
5. If every particle of the fluid has irregular flow, then the flow is
said to be
1. laminar flow
2. turbulent flow
3. fluid flow
4. transient flow
6. The path traced by a single particle is
1. Path line
2. Stream line
3. Streak line
4. Stream tube
7. If every particle of the fluid follow the same path, then flow is
said to be
1. laminar flow
2. turbulent flow
3. fluid flow
4. visid flow
8. The chimney works best on the principle of
1.
2.
3.
4.
equation of continuity
Bernoulli's equation
light equation
speed equation
9. The net force acting on a droplet of water is equal to the
1. weight-drag force
2. weight + drag force
3. weight*drag force
4. weight/drag force
10. The well known formula one racing car has a body with
1. laminated design
2. turbulent design
3. flat design
4. streamlined design
11. The Bernoulli's equation deals with the conservation of
1.
2.
3.
4.
Energy
Mass
Momentum
thrust
12. A Stream line is defined as the line
1. Parallel to central axis flow
2. Parallel to outer surface of flow
3. Equal velocity in flow
4. Pressure drop is uniform
13. The Continuity equation is connected with
1.
2.
3.
4.
Conservation of mass
Compressibility of fluids
Steady/Unsteady fluids
Denser fluids
14. The change in potential energy is measured as the difference
of
1. mgf
2. mgh
3. mg
4. mgt
15. If the fluid has constant density then it is said to be
1.
2.
3.
4.
thick
in-viscous
compressible
incompressible
16. The frictional effect between the layers of the flowing fluid is
known as
1. viscosity
2. friction
3. gravity
4. surface tension
17. If fluid is incompressible and it is steady then its mass is
1. increasing
2. decreasing
3. same
4. conserved
18. Force required to slide one layer from another measures the
1. viscosity
2. friction
3. gravity
4. surface tension
19. According to the equation of continuity the product of area of
pipe and the speed of fluid along the pipe is
1. 1
2. 0
3. constant
4. different
20. When the net force acting on a droplet becomes zero its
constant speed is known as
1. viscosity
2. friction
3. gravity
4. terminal velocity
21. The constant of equation of continuity is known as
1. flow rate
2. friction
3. fluid flow
4. surface tension
22. An object moving through the liquid facing the retarding force
is named as
1.
2.
3.
4.
viscosity
friction
drag force
surface tension
23. When the magnitude of the drag force get equal to the weight
of the drop the net force acting on a drop becomes
1. 1
2. 0
3. min
4. max
24. The change in kinetic energy is measured as the difference of
1. 1/2(mv)2
2. (mv)2
3. 1/2(mv)
4. 1/2(m)2
25. The image of source +k with respect to a circle is a source +k
at the inverse point is
1.
2.
3.
4.
a source +k at the centre
a source +k at the same point
a sink -m at the centre
none of the above
26. In a conformal transformation source is transformed into
1.
2.
3.
4.
equal source
equal sink
equal doublet
source and sink
27. The stream function is constant along a particular stream
line flow
1. false
2. true
3. both
4. cant say
28. The flow in which conditions do not change with time at any
point is known as
1.
2.
3.
4.
Uniform flow
Steady flow
Streamline flow
unsteady flow
29. The flow in which each liquid particle has a definite path and
their path do not cross each other is called
1.
2.
3.
4.
Uniform flow
Steady flow
Streamline flow
unsteady flow
30 At a particular instant the acceleration of the body is called
1.
2.
3.
4.
instantaneous acceleration
instantaneous velocity
instantaneous displacement
instantaneous speed
31. The magnitude of the displacement from initial position to
final position is the
1. straight line
2. curved line
3. circle
4. total distance
32. According to International Standard Atmosphere (ISA) a
decrease in temperature is
1. Decrease in altitude
2. Change in angle of attack
3. Increase in altitude
4. No change in altitude
33. The sonic velocity is largest in which of the following
1. Water
2. Steel
3. Kerosene
4. Air
34.The velocity of disturbance in case of fluids is _____the velocity
of the disturbance in solids
1. less than
2. equal to
3. more than
4. none of the above
35. A stagnation point is the point on the immersed body where
the magnitude of velocity is
1.
2.
3.
4.
small
large
zero
none of the above
36. The sonic velocity in a fluid medium is directly proportional
to
1. Mach number
2. pressure
3. square root of temperature
4. none of the above
37. For a Symmetrical Airfoil the lift coefficient for zero degree
angle of attack is
1. -1.0
2. 0.0
3. 0.5
4. 1.0
38. Which one of the following is favorable for an airplane
operation
1. tail wind in cruise and head wind in landing
2. tail wind both in cruise and landing
3. head wind both in cruise and landing
4. head wind in cruise and tail wind in landing
39. Which one of the following is not true in supersonic flow
1. over a gradual expansion, entropy remains constant
2. over a sharp expansion corner, entropy can increase
3. over a gradual compression, entropy can remain constant
4. over a sharp compression corner, entropy increases
40. All real fluids are
1.
2.
3.
4.
incompressible to some extent
compressible to some extent
Transitional
Turbulent
41. The rate at which temperature decreases with increasing
altitude is known as
1. magnus effect
2. d'alembert paradox
3. lapse rate
4. Aerosols
42. Bernoulli’s equation is valid under steady state
1. only along streamline invisid flow, between two points
in potential flow
2. between any two points in both invisid flow and potential
flow.
3. only along a stream line flow
4. None of the above
43. The flow in river during heavy rainfall is
1. unsteady, non-uniform and 3D
2. Steady, uniform and 2D
3. Steady, uniform and 3D
4. Un steady,uniform and 3D
44. In atmosphere tiny solid or liquid suspended particles of
various composition called
1.
2.
3.
4.
Aerosols
Carcinogens
Green house gas
Microbes