More Classes
5th Class
6th Class
7th Class
8th Class
9th Class
10th Class
11th Class
12th Class
NAT I
NAT II
CSS
IQ
General Knowledge
MDCAT
ECAT
GAT General
GAT Subject
Other Links
Go to Home
Online Tests
Physics ECAT Pre Engineering Chapter 6 Fluid Dynamics Online Test MCQs With Answers
Question # 1
Ball pen functions on the principle of
Choose an answer
Viscosity
Boyle's law
Gravitational force
Surface tnesion
Previous
Skip
Next
Question # 2
A tube tapers from 20 cm diameter to 2 cm, the velocity at first cross-section is 50 ms
-1
then velocity at second cross-section is
Choose an answer
5000 cms
-1
500 cms
-1
50 cms
-1
0.5 cm/s
Previous
Skip
Next
Question # 3
The terminal velocity of water droplet of radius 1 x 10
-4
m and desity 1000 kg m
-3
descending through air of viscosity 19 x 10
-6
kg. m
-1
s
-1
is
Choose an answer
2.5 ms
-1
3.2 ms
-1
4.3 ms
-1
1.1 ms
-1
Previous
Skip
Next
Question # 4
0.10 cm can be written as:
Choose an answer
1.0 x 10
-2
m
1.0 x 10
-3
cm
1.0 x 10
-4
cm
1. x 10
-4
m
Previous
Skip
Next
Question # 5
The pressure will change in the pipe, as the fluid moves through that pipe of varying
Choose an answer
cross-section
height
none of them
both of them
Previous
Skip
Next
Question # 6
Bernoulli's equation is the fundamental equation in fluid dynamics, which relates pressure to fluid
Choose an answer
speed
height
none of them
both of them
Previous
Skip
Next
Question # 7
At low speeds, the drag force is
Choose an answer
proportional to speed
inversely proportional to speed
not simply proportional to speed
none of them
Previous
Skip
Next
Question # 8
Fluids have three types of energies. The Bernoulli's equation combines those energies.which of the following is one of the three enrgies possessed by a fluid?
Choose an answer
potential energy
pressure energy
strain energy
(a) and (b) only
Previous
Skip
Next
Question # 9
Which of the following options states the names of fluids in the order of increasing viscosity?
Choose an answer
mercury, motor oil, methanol
methanol, mercury, motor oil
motor oil, mercury, methanol
methanol, motor oil, mercury
Previous
Skip
Next
Question # 10
Two copper balls of 1 cm and 2 cm in diameter are simultaneously dropped in the same viscous medium. The terminal velocity of bigger ball is:
Choose an answer
Not affected due to its size
Twice that of small size ball
Four times that of small size ball
1/4th of that of small size ball
Previous
Skip
Next
Question # 11
Under normal circumstances, the volume of blood is sufficient to keep the vessels
Choose an answer
flatted for all times
inflated for all times
inflated for small times
none of them
Previous
Skip
Next
Question # 12
Which of the following options correctly states the equation of continuity for an ideal fluid?
Choose an answer
A
1
A
2
= V
1
V
2
A
1
/A
2
= V
2
/V
1
A
1
/A
2
= V
1
/V
2
none of the above
Previous
Skip
Next
Question # 13
The mass of fluid passing through any cross-section per unit time is called
Choose an answer
electric flux
magnetic flux
mass flux
none of them
Previous
Skip
Next
Question # 14
A high concentration of red blood cells increases its viscosity from
Choose an answer
3 - 5 times that of mercury
5 - 8 times that of mercury
3 - 5 times that of water
5 - 8 times that of water
Previous
Skip
Next
Question # 15
Viscosity of water is ______ that of air but ___ that of plasma.
Choose an answer
More, more
Less, more
Less, less
More, less
Previous
Skip
Next
Question # 16
A body is moving through a viscous medium eventually comes to rest because of:
Choose an answer
Force of gravity
Force of friction
Its weight
Both A and C
Previous
Skip
Next
Back