28 + Interview Questions in PRESSURE IN GENERAL AWARENESS Page 1 InterviewSolution

1.	As the height of liquid in a column increases, the amount of pressure will be: (a) Less (b) More (c) No change (d) None of the above
Answer» As the height of liquid in a column increases, the amount of pressure will be More IT will be more as due inc in extrrnal pressure by pascal's law it will increase

Discussion

2.	The unit of pressure is : (a) newton (b) meter/sec (c) newton/metre2 (d) joule
Answer» (c) newton/metre² Newton\m^2...... Answer : c As it is force/ area Answer : c As it is force/ area and all si units are to be used

2.

The unit of pressure is : (a) newton (b) meter/sec (c) newton/metre2 (d) joule

Answer»

(c) newton/metre²

Newton\m^2......

Answer : c

As it is force/ area

Answer : c

As it is force/ area and all si units are to be used

Discussion

3.	Why is the knife used for cutting vegetable sharper?
Answer» Since knife is acute shaped, its contact area becomes less. Therefore with less force, more pressure is exerted and hence vegetables are easily cut.

Discussion

4.	Define pressure?
Answer» Pressure- Vertical force exerted on any contact area is called pressure. Pressure = Force/area of contact Pressure is measured in terms of Newton/metre² or Pascal.

4.

Define pressure?

Answer»

Pressure- Vertical force exerted on any contact area is called pressure.

Pressure = Force/area of contact

Pressure is measured in terms of Newton/metre² or Pascal.

Discussion

5.	Place the sharp head of a nail towards a wooden block it lightly by hammer. nail does not pierce the wooden block by light blow of the hammer. Using same hammer, now strike hard. Why does nail penetrate into wooden block this time? Due to the hard strike by the hammer,more force is applied due to which more pressure is applied on the object.It is clear from both the above activities that magnitude of pressure depends on applied force. When the applied force is different on the same area than the pressure is also different on the object.1. Why does nail penetrate into wooden block this time?2. Why pointed nail gets into the wooden block easily, as compared to a thicker nail?
Answer» 1. When nail is hammered with great force, more pressure gets exerted, hence nail penetrates into the wooden block easily this time. 2. The area of a pointed nail is less in comparison to a thicker nail. Therefore when equal force is exerted, pointed nail exerts more pressure and hence gets (penetrates) into the wooden block easily. On the basis of above two experiments, it is proved that pressure applied on any object depends on force.

5.

Place the sharp head of a nail towards a wooden block it lightly by hammer. nail does not pierce the wooden block by light blow of the hammer. Using same hammer, now strike hard. Why does nail penetrate into wooden block this time? Due to the hard strike by the hammer,more force is applied due to which more pressure is applied on the object.It is clear from both the above activities that magnitude of pressure depends on applied force. When the applied force is different on the same area than the pressure is also different on the object.1. Why does nail penetrate into wooden block this time?2. Why pointed nail gets into the wooden block easily, as compared to a thicker nail?

Answer»

1. When nail is hammered with great force, more pressure gets exerted, hence nail penetrates into the wooden block easily this time.

2. The area of a pointed nail is less in comparison to a thicker nail. Therefore when equal force is exerted, pointed nail exerts more pressure and hence gets (penetrates) into the wooden block easily. On the basis of above two experiments, it is proved that pressure applied on any object depends on force.

Discussion

6.	Put a brick on sponge as show in Figure . Now, put the brick vertical on sponge. The applied force is equal on sponge in both situations.However, we see that sponge squeezes more in vertical position of brick. In which situation, the contract area between sponge and brick is less ?If the area is reduced and value of force is kept constant then pressure increases. This is the reason why the balloon is punctured by sharp pin head and sponge squeezes more in vertical position of brick.We may say that the value of pressure depends on the contact area of object. When contact area is reduced pressure increases.1. In which situation, contact area of the brick and the sponge is less?2. Why sponge gets more depressed when brick is made to stand on it?
Answer» 1. When brick input vertical on the sponge, contact area of both is less. 2. When a brick is made to stand on the sponge, contact area gets decreased, hence more pressure is exerted on the sponge. Therefore it gets more depressed.

6.

Put a brick on sponge as show in Figure . Now, put the brick vertical on sponge. The applied force is equal on sponge in both situations.However, we see that sponge squeezes more in vertical position of brick. In which situation, the contract area between sponge and brick is less ?If the area is reduced and value of force is kept constant then pressure increases. This is the reason why the balloon is punctured by sharp pin head and sponge squeezes more in vertical position of brick.We may say that the value of pressure depends on the contact area of object. When contact area is reduced pressure increases.1. In which situation, contact area of the brick and the sponge is less?2. Why sponge gets more depressed when brick is made to stand on it?

Answer»

1. When brick input vertical on the sponge, contact area of both is less.

2. When a brick is made to stand on the sponge, contact area gets decreased, hence more pressure is exerted on the sponge. Therefore it gets more depressed.

Discussion

7.	Take two balloons filled with air.Puncture one balloon through flat head of pin as shown in Figure and puncture the second balloon through sharp head of the same pin as shown in figureIn which situation balloon punctured easily?
Answer» Since pointed pin has a less area in comparison to the area of the bottom edge of the pin, Therefore when applying equal force with both, more pressure gets exerted with a pointed pin. Therefore it was more easy to burst a balloon with a pointed end of the pin.

Discussion

8.	Place two books on your palm. What do you feel ? Now,remove one book.What difference do you feel now than in the previous position ? why do you feel more comfortable in second situation than previous one ? We feel more pressure due to more weight(force) in the first situation?1. What do you feel?2. What difference do you feel now in the to previous position?3. Why do you feel more comfort able in second situation then previous one?
Answer» 1. We experience a force on the palm. Now remove one book. 2. Less force is exerted as compared to previous, when one book is removed. 3. Due to less force exerted in second situation, pressure exerted is also less. Hence we feel comfortable in the second situation. In first situation, due to more exertion of force, more pressure is exerted.

8.

Place two books on your palm. What do you feel ? Now,remove one book.What difference do you feel now than in the previous position ? why do you feel more comfortable in second situation than previous one ? We feel more pressure due to more weight(force) in the first situation?1. What do you feel?2. What difference do you feel now in the to previous position?3. Why do you feel more comfort able in second situation then previous one?

Answer»

1. We experience a force on the palm. Now remove one book.

2. Less force is exerted as compared to previous, when one book is removed.

3. Due to less force exerted in second situation, pressure exerted is also less. Hence we feel comfortable in the second situation. In first situation, due to more exertion of force, more pressure is exerted.

Discussion

9.	Take a stone. Hold it and then dip it into water. Now, gradually take it out from water. What do you feel? you will find the weight of the held stone is less until it remains inside water but weight increases as it comes out of water.By this we know that the an upward force acts on an object when it is inside water. Similarly, your body appears light when you swim in water.So, we can say that-An upward force acts on objects submerged in liquid which is known as Buoyant force. This property of liquids is Buoyancy.1. What do you experience?2. Why stone appears to weigh less when immersed in water?3. What do you call an upward force exerted on any object, when in water?4. What do you call the buoyant force exerted by the liquid?
Answer» 1. While holding the stone, still in water, its weight appear to be less. 2. When stone is dipped in water, an upward bounce force is exerted, hence stone appears to weigh less. 3. Buoyant Force. 4. Buoyancy.

9.

Take a stone. Hold it and then dip it into water. Now, gradually take it out from water. What do you feel? you will find the weight of the held stone is less until it remains inside water but weight increases as it comes out of water.By this we know that the an upward force acts on an object when it is inside water. Similarly, your body appears light when you swim in water.So, we can say that-An upward force acts on objects submerged in liquid which is known as Buoyant force. This property of liquids is Buoyancy.1. What do you experience?2. Why stone appears to weigh less when immersed in water?3. What do you call an upward force exerted on any object, when in water?4. What do you call the buoyant force exerted by the liquid?

Answer»

1. While holding the stone, still in water, its weight appear to be less.

2. When stone is dipped in water, an upward bounce force is exerted, hence stone appears to weigh less.

3. Buoyant Force.

4. Buoyancy.

Discussion

10.	Take a plastic bottle and make three same sized holes A,B,C at different heights and close them with a tape as in figure. Fill the plastic bottle with water coming out of the holes. From which hole water drops at a greater distance ? The height of the water column above hole A is low i.e., the depth from surface is low whereas the height of the water column above hole C is more. Due to low pressure at hole A, water drops at a shorter distance an due to high pressure at hole C, water drops a greater distance. Thus1. From which hole, water flows at a far distance?2. Why does water flows at a far distance from hole C?3. Why does water flow at a near distance from hole A?
Answer» 1. From hole C, water flows at a far distance. 2. Due to increased amount of pressure, water flows at a far distance from hole C. 3. Pressure exerted is minimum in hole A, hence water flows at a near distance.

10.

Take a plastic bottle and make three same sized holes A,B,C at different heights and close them with a tape as in figure. Fill the plastic bottle with water coming out of the holes. From which hole water drops at a greater distance ? The height of the water column above hole A is low i.e., the depth from surface is low whereas the height of the water column above hole C is more. Due to low pressure at hole A, water drops at a shorter distance an due to high pressure at hole C, water drops a greater distance. Thus1. From which hole, water flows at a far distance?2. Why does water flows at a far distance from hole C?3. Why does water flow at a near distance from hole A?

Answer»

1. From hole C, water flows at a far distance.

2. Due to increased amount of pressure, water flows at a far distance from hole C.

3. Pressure exerted is minimum in hole A, hence water flows at a near distance.

Discussion

11.	Liquid applies pressure on the walls of a pot. To understand it, let us perform an activity. Take a balloon and fill with water gradually. the balloon expands slowly. the expansion of balloon in all directions with increased amount of water shows that -1. Why volume inside the balloon start increasing with the increase of water?2. Why balloon gets burst when liquid level increases?
Answer» 1. Liquid exerts pressure in all directions, henceforth, volume of the balloon also increases. 2. When water increases inside the balloon, it starts applying more pressure. When balloon is not able to stand this increased amount of pressure, it gets burst.

11.

Liquid applies pressure on the walls of a pot. To understand it, let us perform an activity. Take a balloon and fill with water gradually. the balloon expands slowly. the expansion of balloon in all directions with increased amount of water shows that -1. Why volume inside the balloon start increasing with the increase of water?2. Why balloon gets burst when liquid level increases?

Answer»

1. Liquid exerts pressure in all directions, henceforth, volume of the balloon also increases.

2. When water increases inside the balloon, it starts applying more pressure. When balloon is not able to stand this increased amount of pressure, it gets burst.

Discussion

12.	Take water in pot and heat till it boils. Pour this boiled water into a plastic bottle. After sometime,drain water from the plastic bottle and tightly cap the bottle. Now,the cold water pours on bottle. What do you see? Why does the bottle collapse ?After draining the hot water from bottle,water vapours are trapped inside the bottle. When cold water is poured on the bottle then water vapours cool into liquid so the amount of water vapour inside the bottle reduces,thus the resultant pressure also reduces and bottle collapses due to external air-pressure. Thus we can say that air has pressure.Pressure exerted on us surrounding atmosphere is called atmospheric pressure. At sea level, the average value of atmospheric pressure is 101325 pascal.Air flows from high pressure area to low pressure area. So, we can say that air blows due to the difference in air pressure. When air blows with speed, the air-pressure is reduced on the roof but air-pressure increase inside the rooms.Due to this tin-sheds or khaprels' are blown away from weak homes.1. What do you see?2. Why bottle gets compressed?
Answer» 1. Bottle gets compressed. 2. When we empty hot water, water vapors get filled inside the bottle. When cold water is put on the bottle, these water vapors cool down and become liquid, which leads to decrease in pressure inside the bottle, due to pressure of air outside, bottle gets compressed. Therefore, we can say that air exerts pressure.

12.

Take water in pot and heat till it boils. Pour this boiled water into a plastic bottle. After sometime,drain water from the plastic bottle and tightly cap the bottle. Now,the cold water pours on bottle. What do you see? Why does the bottle collapse ?After draining the hot water from bottle,water vapours are trapped inside the bottle. When cold water is poured on the bottle then water vapours cool into liquid so the amount of water vapour inside the bottle reduces,thus the resultant pressure also reduces and bottle collapses due to external air-pressure. Thus we can say that air has pressure.Pressure exerted on us surrounding atmosphere is called atmospheric pressure. At sea level, the average value of atmospheric pressure is 101325 pascal.Air flows from high pressure area to low pressure area. So, we can say that air blows due to the difference in air pressure. When air blows with speed, the air-pressure is reduced on the roof but air-pressure increase inside the rooms.Due to this tin-sheds or khaprels' are blown away from weak homes.1. What do you see?2. Why bottle gets compressed?

Answer»

1. Bottle gets compressed.

2. When we empty hot water, water vapors get filled inside the bottle. When cold water is put on the bottle, these water vapors cool down and become liquid, which leads to decrease in pressure inside the bottle, due to pressure of air outside, bottle gets compressed. Therefore, we can say that air exerts pressure.

Discussion

13.	Newton/metre2 is known as (a) Weber (b) Ferade (c) Pascal (d) None of these
Answer» Newton/metre² is known as Pascal

Discussion

14.	What will be effect on pressure as area increases?
Answer» With the increase in contact area, pressure gets reduced.

Discussion

15.	What is the relation between force (F), pressure (P) and area (A). (a) P=F/A (b) A=FP (c) F=AP(d) F2=PA
Answer» P=F/A is the relation between force (F), pressure (P) and area (A).

Discussion

16.	What is the machine called used to measure atmospheric pressure? (a) Hydrometer (b) Barometer (c) Hygrometer (d) None of the above
Answer» (b) Barometer

Discussion

17.	What is called Atmospheric Pressure?
Answer» Pressure exerted by atmosphere, surrounded in all directions, is known as atmospheric pressure.

Discussion

18.	Fill in the blanks 1. Pressure value of any object depends on contact …………. of the object on which pressure is exerted.2. Air exerts same amount of pressure in all…… 3. Pressure of liquid on one point is …………….situated on same horizontal area.4. With increase in depth, pressure of liquid
Answer» 1. area 2. directions 3. equal 4. increases.

18.

Fill in the blanks 1. Pressure value of any object depends on contact …………. of the object on which pressure is exerted.2. Air exerts same amount of pressure in all…… 3. Pressure of liquid on one point is …………….situated on same horizontal area.4. With increase in depth, pressure of liquid

Answer»

1. area

2. directions

3. equal

4. increases.

Discussion

19.	What is the average atmospheric pressure at the sea level?
Answer» 101325 Pascal.

Discussion

20.	What is the pressure exerted on the points situated on the same horizontal area?
Answer» Pressure exerted is same for all points situated on same horizontal area.

Discussion

21.	On what aspects does the pressure exert on any object depend?
Answer» Pressure exerted on any object depends on force exerted and its contact area.

Discussion

22.	How is pressure measured?
Answer» Pressure of the liquid is measured in Newton/meter or pascal.

Discussion

23.	What is the impact on pressure if height of water column increases?
Answer» With the increase in height of water column, pressure of the liquid also increases.

Discussion

24.	Explain Archimedes Principle.
Answer» According to Archimedes principle: Difference in weight of an object is observed when immersed in water partially or completely, and this difference in weight is equal to the water displaced by an object. Difference in weight of an object = Weight of the liquid displaced by an object.

24.

Explain Archimedes Principle.

Answer»

According to Archimedes principle:

Difference in weight of an object is observed when immersed in water partially or completely, and this difference in weight is equal to the water displaced by an object.

Difference in weight of an object = Weight of the liquid displaced by an object.

Discussion

25.	Explain reasons of below mentioned1. Our body experience high amount of atmospheric pressure, still our body does not get puckered. 2. Why are strips of the school bags made thicker and broad. 3. Tyres of heavy vehicles Eire made very thick 4. Divers wear a metal armor while diving in sea.
Answer» 1. Air of atmosphere exerts so much pressure on human body that it experiences approx. 15000 kg of weight force still our body does not get puckered, because pressure in our body balances the air pressure. 2. Strips of school bags hanged on shoulders are made thick, so that their contact area gets increased and therefore pressure exerted on the shoulder becomes less, and bags can be carried easily by children on their shoulders. 3. Pressure exerted on roads or land, is expressed by the ratio of force and contact area of the same. Due to thickness of tyres, contact area gets increased, therefore pressure exerted on roads/land becomes less. Therefore due to less pressure, type does not get inside the mud on the road and vehicle moves easily. 4. When you go deep inside the water, pressure increases. Therefore body of the divers will not able to stand with pressure when they go deep inside the sea. With the help of a metal armor, pressure gets exerted on this metal shield rather than on body of the diver. Hence divers can easily go inside the sea.

25.

Explain reasons of below mentioned1. Our body experience high amount of atmospheric pressure, still our body does not get puckered. 2. Why are strips of the school bags made thicker and broad. 3. Tyres of heavy vehicles Eire made very thick 4. Divers wear a metal armor while diving in sea.

Answer»

1. Air of atmosphere exerts so much pressure on human body that it experiences approx. 15000 kg of weight force still our body does not get puckered, because pressure in our body balances the air pressure.

2. Strips of school bags hanged on shoulders are made thick, so that their contact area gets increased and therefore pressure exerted on the shoulder becomes less, and bags can be carried easily by children on their shoulders.

3. Pressure exerted on roads or land, is expressed by the ratio of force and contact area of the same. Due to thickness of tyres, contact area gets increased, therefore pressure exerted on roads/land becomes less. Therefore due to less pressure, type does not get inside the mud on the road and vehicle moves easily.

4. When you go deep inside the water, pressure increases. Therefore body of the divers will not able to stand with pressure when they go deep inside the sea. With the help of a metal armor, pressure gets exerted on this metal shield rather than on body of the diver. Hence divers can easily go inside the sea.

Discussion

26.	What are the principles of liquid pressure?
Answer» Principles of liquid pressure are as mentioned below: 1. In still water, same pressure is exerted on all the points lying in same horizontal area. 2. Inside still water, on any point,pressure exerted in each direction is same. 3. With the increase in water column, its pressure also increases. 4. if pressure is exerted on any point of the liquid, it gets distributed equally in water.

26.

What are the principles of liquid pressure?

Answer»

Principles of liquid pressure are as mentioned below:

1. In still water, same pressure is exerted on all the points lying in same horizontal area.

2. Inside still water, on any point,pressure exerted in each direction is same.

3. With the increase in water column, its pressure also increases.

4. if pressure is exerted on any point of the liquid, it gets distributed equally in water.

Discussion

27.

What is the difference between force and Pressure.

Answer»

Force	Pressure
1. Force is that factor which brings changes in state of an object, or try to bring change in its state.	1. Vertical force exerted on an area is called pressure.
2. Force exerted does not depend on the contact area of an object.	2. Pressure exerted depends on the contact area of an object.
3. Force is measured in Newton.	3. Pressure is measured in newton/m²

Discussion

28.	Why are water tanks kept at heights for distribution of water?
Answer» For supply of water in houses made at heights, it is necessary that water sent for distribution should flow with more pressure and also, height of the water tank should be more than the height of the house. Therefore for distribution of water, water tanks are made at heights.

Discussion

Explore topic-wise InterviewSolutions in .

As the height of liquid in a column increases, the amount of pressure will be: (a) Less (b) More (c) No change (d) None of the above

The unit of pressure is : (a) newton (b) meter/sec (c) newton/metre2 (d) joule

Why is the knife used for cutting vegetable sharper?

Define pressure?

Take two balloons filled with air.Puncture one balloon through flat head of pin as shown in Figure and puncture the second balloon through sharp head of the same pin as shown in figureIn which situation balloon punctured easily?

Newton/metre2 is known as (a) Weber (b) Ferade (c) Pascal (d) None of these

What will be effect on pressure as area increases?

What is the relation between force (F), pressure (P) and area (A). (a) P=F/A (b) A=FP (c) F=AP(d) F2=PA

What is the machine called used to measure atmospheric pressure? (a) Hydrometer (b) Barometer (c) Hygrometer (d) None of the above

What is called Atmospheric Pressure?

What is the average atmospheric pressure at the sea level?

What is the pressure exerted on the points situated on the same horizontal area?

On what aspects does the pressure exert on any object depend?

How is pressure measured?

What is the impact on pressure if height of water column increases?

Explain Archimedes Principle.

Explain reasons of below mentioned1. Our body experience high amount of atmospheric pressure, still our body does not get puckered. 2. Why are strips of the school bags made thicker and broad. 3. Tyres of heavy vehicles Eire made very thick 4. Divers wear a metal armor while diving in sea.

What are the principles of liquid pressure?

What is the difference between force and Pressure.

Why are water tanks kept at heights for distribution of water?