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

Physics ECAT Pre Engineering Chapter 6 Fluid Dynamics Online Test

Sr. #	Questions	Answers Choice
1	At the starting point of the free fall motion of an object, its acceleration will be	maximum minimum zero none of them
2	The body will move with terminal velocity when it acquires	minimum speed zero speed maximum speed none of them
3	During the free fall motion of an object, when its weight becomes equal to the drag force, then it will move with	maximum speed zero speed maximum speed none of them
4	When weight of an object falling freely becomes equal to the drag force, then the body will move with	increasing speed decreasing speed constant speed none of them
5	When a water droplet falls through air, the net force on it is	Net force = drag force - weight Net force = weight - drag force Net force = drag force + weight Net force = weight + drag force
6	When a water droplet falling freely through air, the drag force on water droplet increases with th	decrease in speed increase in speed pressure none of them
7	At low speeds, the drag force is	proportional to speed inversely proportional to speed not simply proportional to speed none of them
8	The maximum drag force on a falling sphere is 9.8 N, it weight is	1 N 9.8 N 4.9 N Cannot be calculated
9	According to slok's law, drag force depends on	Radius of the spherical body Terminal velocity of body Coefficient of viscosity All of above
10	When the speed of a body in a fluid increases then the drag force	decreases becomes zero increases non of them
11	An object moving through a fluid experiences a retarding force called a	frictional force terminal force opposing force drag force
12	Liquids and gasses have	zero viscosity non-zero viscosity very large viscosity very small viscosity
13	Substances that flow easily have	large coefficient of viscosity small coefficient of viscosity either of them none of them
14	Substances that do not flow easily have	large coefficient of viscosity small coefficient of viscosity either of them none of them
15	How much force is required to slide one layer of the liquid over the other layer is measured by	friction density viscosity resistivity

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