ECAT Pre Computer Science Chapter 6 online mcq test with answers for Physics chapter 6 (Fluid Dynamics)

ECAT Physics Chapter 6 Fluid Dynamics Online Test

Sr. #	Questions	Answers Choice
1	If v is the velocity of flow of liquid through a tube of area of cross-section A, then according to equation of continuity	v/A = constant A/v = constant Av = constant None
2	Two water pipes of diameters 4 cm and 8 cm are connected with a supply line. The velocity of flow of water in the pipe 4 cm diameter is	1/4 times 4 times Twice 1/2 of 8 cm diameter pipe
3	The rain drop falling from the sky reach the ground with	Constant terminal velocity Constant gravitational acceleration Variable acceleration acceleration greater than g
4	In case of streamed lined flow of liquid, the loss of energy is	Maximum Minimum Infinite equal to what is in turbulent flow
5	Fluids resist force, This property is called	Stiffness Strength Ductility Elasticity
6	The fluid which is incompressible and non viscous is called	Ideal fluid Non-ideal fluid Prefect fluid All
7	The electrical forces between the molecules of a liquid are	Repulsive Attractive Both A and B None
8	A container has a small hole in the bottom. Air can go through this hole,but water cannot. This can be best explained by the statement that	water contains hydrogen atoms, air does not water molecules are smaller than molecules in the air water molecules are smaller than molecules in the air surface tension of the water prevents it from
9	If water rises 4 cm in a long, thin tube because of capillary action, then, under corresponding conditions of use, the rise (in the tube) of a liquid whose density is 2 g/cm²will be	1 cm 2 cm 8 cm None
10	When the velocity of a liquid flowing steadily in a tube increases, its pressure?	Decreases Increases Remains same Zero
11	Fire fighters have jet attached to the head of their water pipes in order to	Increase the mass of water flowing per second Increase the velocity of water flowing out Increase the volume of water flowing per second Avoid wastage of water
12	Deep water almost runs still when surface water flow in rivers. What does it explains	Magnus effect Equation of continuity Surface energy Bernoulli's equation
13	Fire fighters have a jet attached to the head of their water pipes in order to head of their water pipes in order to	Increase the mass of water flowing per second Avoid wastage of water Increase the velocity of water flowing out Increase the volume of water flowing per second
14	Surface tension of water is reduced by adding	Detergents Camphor Plastic Both A and B
15	Bernoulli's equation is based upon law of conversation of	mass momentum Energy None

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