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Shapes of Average and Marginal Cost Curves in the Short Run

What is eleva...

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What is elevation head , pressure head and velocity head ?

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Q. Which of the following pairs are correctly matched?

1. Piezometric head
....Sum of datum head and pressure head

2. Dynamic head
...Sum of datum head and velocity head

3. Stagnation head
...Sum of pressure head and velocity head

4. Total head
...Sum of piezometric head and dynamic head

Select the correct answer using the codes given below:

According to which theorem/principle the sum of pressure head, velocity head and gravity head is constant:

Q. A and B are at the same elevation of 2.5 m above datum in the valve and pipe line shown in the given figure. Velocity head of 0.5 m, head loss in valve of 0.2 m and pressure head of 2.5 m are the parameters at A. Piezometric head at B is equal to

Q. Consider the following statements:

A horizontal pipe reduces from 10 cm to 5 cm in diameter. If the pressure head at 10 cm section is 10 metres and velocity head is 1 metre, then the

1. Total head at any point is 11 metres

2. Pressure head at the 5 cm section is negative

3. Discharge varies proportionate to the diameter

4. Datum head at all sections is constant

Which of these statements is/are correct?

Three coins are tossed 200 times and we get

three heads: 39 times; two heads: 58 times;

one head: 67 times; 0 head: 36 times.

When three coins are tossed at random, what is the probability of getting (i) 3 heads? (ii) 1 head? (iii) 0 head? (iv) 2 heads?

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Shapes of Average and Marginal Cost Curves in the Short Run

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