Pressure and Its Measurement MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Pressure and Its Measurement, 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 Pressure and Its Measurement 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 Pressure and Its Measurement mcq questions that explore various aspects of Pressure and Its Measurement problems. Each MCQ is crafted to challenge your understanding of Pressure and Its Measurement 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 Pressure and Its Measurement MCQs are your pathway to success in mastering this essential Fluid Mechanics topic.

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Pressure and Its Measurement MCQs | Page 4 of 7

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Q31.
A beaker is filled with a liquid of density ฯ1 up to a certain height. A is a point, h m downwards from the free surface such that the pressure at A is P. If the liquid is replaced by equal volume of another liquid of density ฯ2, at what distance from the free surface will the pressure be P now?

a.

h

b.

\(\frac{ฯ1 + ฯ2}{2}\) h

c.

\(\frac{ฯ1}{ฯ2}\) h

d.

\(\frac{ฯ2}{ฯ1}\) h

Discuss
Answer: (c).\(\frac{ฯ1}{ฯ2}\) h
Q32.
A beaker is filled with a liquid of density ฯ up to a height h. If half the liquid is replaced by equal volume of another liquid of twice the density, what will be the change in the base pressure?

a.

increased by ฯgh

b.

decreased by ฯgh

c.

increased by ฯgh=2

d.

decreased by ฯgh=2

Discuss
Answer: (c).increased by ฯgh=2
Q33.
A cuboidal container (each side of 30 cm) is completely filled with water. A is a point, 25 cm above the base such that the pressure at point A is P. At what height (in cm) from the base will the pressure be 2P?

a.

20

b.

15

c.

12.5

d.

10

Discuss
Answer: (a).20
Q34.
A closed tank (of height 5 m) is Partially filled with a liquid as shown. If the pressure of the air above the fluid is 2 bar, find the pressure at the bottom of the tank. Assume the density of the liquid to vary according to the following relation: (where y is the height from the base)

a.

2.12

b.

2.15

c.

2.18

d.

2.5

Discuss
Answer: (c).2.18
Q35.
The pressure gauges 1, 2 and 3 are installed on the system as shown. If the readings of the gauges be Pโ‚ = 1 bar, Pโ‚‚ = 2 bar and Pโ‚ƒ = 3 bar, what will be the value of P? (Take Pโ‚โ‚œโ‚˜ = 1.01 bar)

a.

3.01

b.

4.01

c.

6.01

d.

7.01

Discuss
Answer: (d).7.01
Q36.
Barometer uses the principle of fluid at rest or pressure gradient for its pressure calculation.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q37.
The right limb of a simple U-tube manometer containing mercury is open to the atmosphere while the lift limb is connected to a pipe in which a fluid of specific gravity 0.85 is flowing. The centre of the pipe is 14 cm below the level of mercury in the right limb. Evaluate the pressure of fluid flowing in the pipe if the difference of mercury level in the two limbs is 22 cm.

a.

2.86 N/cm²

b.

5.73 N/cm²

c.

1.43 N/cm²

d.

None of the mentioned

Discuss
Answer: (a).2.86 N/cm²
Q38.
A single coloumn manometer is connected to a pipe containing a liquid of specific gravity 0.75. Find the pressure in the pipe if the area of reservoir is 250 times the area of tube for the manometer reading. The difference in mercury level is 40 cm. On the left limb the fluid is upto the height of 20 cm.

a.

10.42 N/cm²

b.

5.21 N/cm²

c.

2.60 N/cm²

d.

None of the mentioned

Discuss
Answer: (b).5.21 N/cm²
Q39.
A Differential manometer is connected at the points A and Bat the centre of two pipes. The pipe A(left limb) contains a liquid of specific gravity = 1.5 while pipe B (right limb)contains a liquid of specific gravity 0.85. The pressure at A and B are 0.5 kgf/cm² and 1.2 kgf/cm² respectively. Find the difference in level of mercuru in the differential manometer. A is 2.5m above B and 5 m above the mercury in its own limb. B is 2.5 m above the mercury level in limb A.

a.

12.7 cm

b.

25.5 cm

c.

6.28 cm

d.

10.85 cm

Discuss
Answer: (a).12.7 cm
Q40.
An inverted differential manometer is connected to two pipes A and B which covey water. The fluid in manometer is oil of specific gravity 0.75. For the manometer readings, find the pressure difference between A and B. Datum in left limb is 40 cm above point A. Point B is 60 cm below datum line. Difference in level of fluid is 20 cm.

a.

1471 N/m²

b.

2943 N/m²

c.

735.75 N/m²

d.

None of the mentioned

Discuss
Answer: (a).1471 N/m²
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