Physics - MOST IMPORTANT NDA Previous Year Questions
Practice real questions from previous year exams of NDA.
📘 Fluid Mechanics📚 Archimedes Principle and its applications
Q1
Why doesn't Archimedes' principle hold for a vessel under a free fall?
🎯 NDA 2006-I
📘 Fluid Mechanics📚 Types of Buoyancy and its applications
Q2
A block of weight W floats in a lake. If the apparent weight of the floating block is W', then which one of the following is correct?
🎯 NDA 2006-I
📘 Fluid Mechanics📚 Archimedes Principle and its applications
Q3
The specific gravity of a substance is measured by a hydrometer at the sea level. If the measurement is done at the top of a mountain, what would be the specific gravity?
🎯 NDA 2006-II
📘 Fluid Mechanics📚 Capillarity and examples
Q4
Consider the following statements: If there were no capillarity,
1. it would be impossible to use a kerosene lamp.
2. one would not be able to use a straw to consume a soft drink.
3. the blotting paper would fail to function.
4. there would have been no plants on the earth.
Which of the statements given above are correct?
🎯 NDA 2007-I
📘 Fluid Mechanics📚 Archimedes Principle and its applications
Q5
A solid cube of iron (specific gravity = 8) is melted into sheets. The side of the cube is 1m. The sheets are used to make a hollow cube. This cube floats such that its whole volume is inside water. What should be the minimum length of side of such a cube?
🎯 NDA 2007-II
📘 Fluid Mechanics📚 Archimedes Principle and its applications
Q6
A block of ice is floating in a beaker containing liquid of specific gravity greater than one. When ice melts completely what happens to the level of liquid in the beaker?
🎯 NDA 2007-II
📘 Fluid Mechanics📚 Archimedes Principle and its applications
Q7
A cylinder of mass m and radius R floats vertically in a liquid of density d. What is the height of the submerged region?
🎯 NDA 2007-II
📘 Fluid Mechanics📚 Archimedes Principle and its applications
Q8
Consider the following statements:
The fraction of a ball floating inside the liquid depends upon
1. density of the liquid.
2. mass of the ball.
3. density of the ball.
Which of the statements given above are correct?
🎯 NDA 2008-I
📘 Fluid Mechanics📚 Pascal's Principle
Q9
Consider the following statements:
An external pressure p0 is applied to the surface of a liquid in a container. Then,
1. the pressure on all side-wells increases by p0
2. the pressure on the bottom wall increases by p0
3. the pressure at all points inside the liquid increases by p0
Which of the statements given above is/are correct?
🎯 NDA 2008-I
📘 Fluid Mechanics📚 Fluid Pressure and its applications
Q10
Let us assume that air density(0.0013g/ cm^3) remains constant as we go up in the atmosphere. In such a hypothetical case, what is the approximate height of atmosphere to have 1 atmospheric pressure?
🎯 NDA 2008-I
📘 Fluid Mechanics📚 Bernoulli's Principle
Q11
Flow velocities in an incompressible fluid can be measured with which one of the following?
🎯 NDA 2008-II
📘 Fluid Mechanics📚 Fluid Pressure and its applications
Q12
A syringe is a hollow glass tube with lower end tapered to a nozzle. Due to which one of the following liquid can be drawn into a syringe?
🎯 NDA 2008-II
📘 Thermal Properties of Matter📚 Humidity
Q13
The mass of water vapour per unit volume of air is known
🎯 NDA 2009-I
📘 Fluid Mechanics📚 Viscosity
Q14
Kinetic viscosity of a given liquid is the ratio of the
🎯 NDA 2009-II
📘 Fluid Mechanics📚 Surface Tension and its applications
Q15
When oil floats on water, the surface tension of water
🎯 NDA 2009-II
📘 Fluid Mechanics📚 Surface Tension and its applications
Q16
Consider two hollow glass spheres, one containing water and the other containing mercury. Each liquid fills about one-tenth of the volume of the sphere. In zero gravity environment
🎯 NDA 2009-II
📘 Units and Dimensions📚 Fundamental and Supplementary Units of Measurement
Q17
The density of cast iron having specific gravity 7.20 is
🎯 NDA 2009-II
📘 Fluid Mechanics📚 Archimedes Principle and its applications
Q18
A vessel contains oil of density 0.8 gm/cm^3 over mercury of density 13.6 gm/cm^3. A homogeneous sphere floats with half of its volume immersed in mercury and the other half in oil. The density of the material of the sphere in CGS unit is
🎯 NDA 2009-II
📘 Fluid Mechanics📚 Fluid Pressure and its applications
Q19
Water flows out of the hole of a bucket and follows a parabolic path. If the bucket falls freely under gravity, the water flow (ignoring air resistance)
🎯 NDA 2009-II
📘 Fluid Mechanics📚 Archimedes Principle and its applications
Q20
A vessel contains oil (density p1) over a liquid of density p2; a homogeneous sphere of volume V floats with half of its volume immersed in the liquid and the other half in oil. The weight of the sphere is
🎯 NDA 2010-I