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Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation


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10 Questions MCQ Test Fluid Mechanics for Civil Engineering | Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation

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Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 1

 When is orifice called ‘large orifice’?

Detailed Solution for Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 1

Explanation: It is the correct parametric definition for ‘large orifice’.

Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 2

In case of any orifice, velocity always remains constant and hence discharge can be calculated.

Detailed Solution for Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 2

Explanation: In case of large orifice, velocity always remains variable and hence discharge cannot be calculated.

Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 3

Find the discharge through a rectangular orifice 2.2 m wide and 1.3 m deep fitted to a easier tank. The water level in a team is 2.5 m above the top edge of orifice. 

Detailed Solution for Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 3

Explanation: Q = 2/3 Cd *b*√2g* (H21.5 – H11.5)
Here,
H1 = 3.8
H2 = 2.5
b = 2.2
Hence, Q = 13.9 m3/s.

Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 4

 Find the discharge through a rectangular orifice 3.2 m wide and 1.7 m deep fitted to a easier tank. The water level in a team is 3.3 m above the top edge of orifice. Take Cd = 0.6 

Detailed Solution for Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 4

Explanation: Q = 2/3 Cd *b*√2g* (H21.5 – H11.5)
Here,
H1 = 5
H2 = 3.3
b = 3.2
Hence, Q = 29.4 m3/s.

Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 5

Find the discharge through totally drowned orifice of width 2.3 m if the difference of water levels on both side of the orifice be 40 cm. The height of water from top and bottom of the orifice are 2.6 m and 2.75 m respectively. 

Detailed Solution for Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 5

Explanation: Q = Cd * b * (H2 – H1) √2gH
Here, b = 2.3
H2 = 2.75
H1 = 2.6
H = 40
Q = .56 m3/s.

Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 6

Find the discharge through totally drowned orifice of width 3.3 m if the difference of water levels on both side of the orifice be 50 cm. The height of water from top and bottom of the orifice are 2.25 m and 2.67 m respectively. 

Detailed Solution for Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 6

Explanation: Q = Cd * b * (H2 – H1) √2gH
Here, b = 3.3
H2 = 2.67
H1 = 2.25
H = 50
Q = 2.6 m3/s.

Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 7

A rectangular orifice of 2 m width and 1.2 m deep is fitted in one side of large tank. The easier level on one side of the orifice is 3m above the top edge of the orifice while on the other side of the orifice the water level is 0.5 m below it’s top edge. Calculate discharge if Cd = .64 

Detailed Solution for Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 7

Explanation: Explanation: Q = Cd * b * (H2 – H) √2gH
Here, b = 2
H2 = 4.2

H = 3.5
Q = 4.94 m3/s.

Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 8

The time taken to empty the tank is independent of Cd but depends only on the height and acceleration due to gravity.

Detailed Solution for Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 8

Explanation: The time taken to empty the tank is dependent on Cd as well as depends only on the height and acceleration due to gravity.

Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 9

The discharge rate is independent of the height difference and dependent only on the height.

Detailed Solution for Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 9

Explanation: The discharge rate is dependent both on the height difference and the height.

Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 10

In case of submerged orifice the discharge is substantially dependent on temperature of fluid

Detailed Solution for Test: Bernoulli’s Equation For Real Fluids & Applications Of Bernoulli’s Equation - Question 10

Explanation: Discharge is dependent on temperature but minimally.

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