Bernoulli Equation MCQs : Here you will find MCQ Questions related to "Bernoulli Equation" in Aerodynamics. These Bernoulli Equation MCQ Questions Will help you to improve your Aerodynamics knowledge and will prepare you for various Examinations like Competitive Exams, Placements, Interviews and other Entrance Exmaniations
Question 1
If the fluid flow at some point along a streamline is brought to rest, this point is called?
A. Bernoulli point
B. stagnation point
C. Pressure point
D. ideal point
View Answer
Ans : B
Explanation: If the fluid flow at some point along a streamline is brought to rest, this point is called a stagnation point, and at this point the total pressure is equal to the stagnation pressure.
Question 2
Bernoulli's principle can be derived from the principle of?
A. conservation of mass
B. conservation of voltage
C. conservation of energy
D. conservation of momentum
View Answer
Ans : C
Explanation: Bernoulli's principle can be derived from the principle of conservation of energy. This states that, in a steady flow, the sum of all forms of energy in a fluid along a streamline is the same at all points on that streamline.
Question 3
An increase in the speed of the fluid, implying an ___________ in its kinetic energy.
A. increase
B. decreases
C. remain same
D. None of the above
View Answer
Ans : A
Explanation: An increase in the speed of the fluid – implying an increase in its kinetic energy (dynamic pressure) – occurs with a simultaneous decrease in (the sum of) its potential energy (including the static pressure) and internal energy.
Question 4
Bernoulli's principle can also be derived directly from Isaac Newton's ____________.
A. Third Law of Motion
B. Zero Law of Motion
C. First Law of Motion
D. Second Law of Motion
View Answer
Ans : D
Explanation: Bernoulli's principle can also be derived directly from Isaac Newton's Second Law of Motion. If a small volume of fluid is flowing horizontally from a region of high pressure to a region of low pressure, then there is more pressure behind than in front. This gives a net force on the volume, accelerating it along the streamline.
Question 5
In the below formula z stands for?
A. z is the fluid flow speed at a point on a streamline,
B. z is the acceleration due to gravity,
C. z is the elevation of the point above a reference plane
D. z is the pressure at the chosen point
View Answer
Ans : C
Explanation: z is the elevation of the point above a reference plane, with the positive z-direction pointing upward – so in the direction opposite to the gravitational acceleration
Question 6
The constant in the Bernoulli equation can be normalised.
A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
View Answer
Ans : A
Explanation: The constant in the Bernoulli equation can be normalised. A common approach is in terms of total head or energy head H.
Question 7
Bernoulli’s equation is applicable only for _______
A. Irrotational flow
B. Viscous flow
C. Compressible flow
D. Inviscid, incompressible flow
View Answer
Ans : D
Explanation: Bernoulli’s equation is applicable only for inviscid and incompressible flow because in inviscid flow, the viscosity is zero and hence no viscous forces acts on the body also incompressible flow means the density remains constant. The inviscid and incompressible flow reduces many fluid problems.
Question 8
The coefficient of pressure at stagnation point is ___________
A. 0
B. 0.5
C. 1
D. 0.7
View Answer
Ans : C
Explanation: The coefficient of pressure is the dimensional less quantity and it describes the relative pressure at each and every point in a flow field. At stagnation point, its value is maximum and it can change from point to point in a flow field.
Question 9
Bernoulli's equation is not valid for ideal fluids
A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
View Answer
Ans : B
Explanation: Bernoulli's equation is valid for ideal fluids: those that are incompressible, irrotational, inviscid, and subjected to conservative forces.
Question 10
Change in kinetic energy is measured as the difference of?
A. 1/2(mv)²
B. (mv)²
C. 1/2(mv)
D. 1/2(m)²
View Answer
Ans : A
Explanation: Change in kinetic energy is measured as the difference of 1/2(mv)²