Orifices,Notches and Weirs MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Orifices,Notches and Weirs, a fundamental topic in the field of Fluid Mechanics. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Orifices,Notches and Weirs MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Orifices,Notches and Weirs mcq questions that explore various aspects of Orifices,Notches and Weirs problems. Each MCQ is crafted to challenge your understanding of Orifices,Notches and Weirs principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Fluid Mechanics tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Orifices,Notches and Weirs MCQs are your pathway to success in mastering this essential Fluid Mechanics topic.

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Orifices,Notches and Weirs MCQs | Page 1 of 5

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Q1.
When is orifice called ‘large orifice’?

a.

If the head of liquid is less than 5 times the depth of orifice

b.

If the head of liquid is less than 2.5 times the depth of orifice

c.

If the head of liquid is less Hence, 4 times the depth of orifice

d.

If the head of liquid is less than 1.5 times the depth of orifice

Discuss
Answer: (a).If the head of liquid is less than 5 times the depth of orifice
Q2.
In case of any orifice, velocity always remains constant and hence discharge can be calculated.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q3.
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.

a.

13.9 m³/s

b.

11.5 m³/s

c.

16.9 m³/s

d.

8.7 m³/s

Discuss
Answer: (a).13.9 m³/s
Q4.
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

a.

29.4 m³/s

b.

58.5 m³/s

c.

67.9 m³/s

d.

78.7 m³/s

Discuss
Answer: (a).29.4 m³/s
Q5.
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 to and bottom of the orifice are 2.6 m and 2.75 m respectively.

a.

.56 m³/s

b.

.64 m³/s

c.

.75 m³/s

d.

.55 m³/s

Discuss
Answer: (a)..56 m³/s
Q6.
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 to and bottom of the orifice are 2.25 m and 2.67 m respectively.

a.

2.8 m³/s

b.

2.7 m³/s

c.

2.6 m³/s

d.

2.5 m³/s

Discuss
Answer: (a).2.8 m³/s
Q7.
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

a.

4.95 m³/s

b.

5.67 m³/s

c.

3.56 m³/s

d.

6.75 m³/s

Discuss
Answer: (a).4.95 m³/s
Q8.
The time taken to empty the tank is independent of Cd but depends only on the height and acceleration due to gravity.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q9.
The discharge rate is independent of the height difference and dependent only on the height.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q10.
In case of submerged orifice the discharge is substantially dependent on temperature of fluid.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
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