Karnataka Diploma Applied Science Model Question Paper-1 With Answers 2019

APPLIED SCIENCE MODEL QUESTION PAPER-1
PART-A
Answer any 10 questions,each Carries 02 marks.
1.Define Unit
->The Standard of references for the measurement of physical quantity is called unit.

2.Define scalars and vectors
->The physical quantities which have both magnitude but no direction are called scalar quantities.
    The physical quantities which have both magnitude and direction are called vector quantities.

3.Define resultant of Forces

->A single force or vector which produces same effect as two or more number of forces or vectors is called resultant of the forces  or vectors.

4.Define momentum of a couple

->Two equal unlike parallel forces not in the same straight line will constitute a couple. the effect of couple is a rotation. the rotation effect of couple is called moment of a couple.

5.What is plasticity?

->The property of a body by virtue of which it does not regain its original shape, size and volume on the removal of   deforming forces is called plasticity.

6.What is compressibility?
->The property by virtue of which a body can be compressed so as to occupy smaller volume, by the application of external forces, is called compressibility.

7.Define viscosity of liquid.

->The  property of liquid by virtue of which it exerts a tangential force between adjacent layers of liquid ending to destroy relative velocity between them and equalise their motion is known as viscosity.

8.Define specific heat of a substance.

->Specific heat of a substance is the quantity of heat required to raise the temperature of the kilogram of body through 1 kelvin.

9.What is thermodynamics ?
->Thermodynamics is a branch of science which deals with conversion of mechanical energy into heat energy and vice versa.

10.Define time period.

->The time required to complete one vibration or one oscillation is called time period.

11.What are the  beats?

->Where to sound waves of nearly same frequencies travel in a straight line in the same direction are superposed in the resultant wave is called beats.

12.What are electro - magnetic waves?

->The Waves consisting of fluctuating electric and magnetic fields at right angles to each other and also at right angle to the direction of propagation are called as the electromagnetic waves.

13.What is nanotechnology?
->Nanotechnology is the process of breathing things at home by atom and molecule by molecule or it is a process of manufacturing at the molecular level.

14.What are electrolytes?

->Electrolytes are the substances which conduct electricity either in the solution state or in the fixed state and decomposed by the passage of electric current.

15.What are composite materials?
->Composite material is the material formed from two or more components, resulting into special character for the material. it is reason to take the best properties of two materials and produce a composite material of better quality.

PART-B

Answer any 10 questions each carries 5 or 10 marks
1.Draw a neat diagram of vernier calipers and label its parts.

2.Write the condition for equilibrium of coplanar parallel forces.
->Equilibrium of a body, the body should not have translatory motion and rotatory motion for this the body should satisfy the following two conditions.
1. the sum of the forces acting on a body in One Direction is equal to the sum of the forces in opposite direction.
2. the sum of the clockwise moment is equal to the sum of anticlockwise moments.

3.Explain stress strain graph.
->Graph of stress and strain indicates the behaviour of a metallic rod RR wire under various load.

The first portion of the graph is a straight line which show that stress is directly proportional to strain obeying hooke’s law. in this Ranger is perfectly elastic and the point ‘A’ on the graph is called elastic limit.

Four lobes beyond the point ‘A’,the graph band slightly and the hooks law is not obeyed. extension is more for a small increase of stress.  in portion AB, the material uses elastic nature to certain extent and. B is called Yield Point.

Beyond the Yield Point. The  extension takes place rapidly because of sliding of molecules of the wire. and portion ‘BC’, the De formation is permanently set and it is called plastic region.

Beyond ‘C’  the next formation starts at some point in the wire. further, even small increase of stress, this is the wire and finally at D  the wire breaks. this stress is called ultimate stress or breaking stress.

4.Define K.E.  of liquid in motion. state the Bernoulli's theorem.

->Kinetic energy:  it is the energy process by the liquid due to its velocity. If ‘V’ Is the velocity after flowing liquid then, kinetic energy or Kinetic head,

    K.E. = 1/2g V2

Bernoulli's theorem: Bernoulli's theorem for liquid state as “ in an ideal  in compressible fluid when the flow is Steady and continuous, the sum of pressure energy, kinetic energy and potential energy is constant along a streamline”.

5.What is capillarity? Write any three application of surface tension.
->Capillarity: Capillarity is the Rise or fall of a liquid in a capillary tube. triple it is due to surface tension force.

     The application of surface tension are:

1. Products like soap and detergent which have ability to reduce Cohesion and hence surface tension decreases and permitting the liquid to penetrate Android and grease in order to  dissolve them.

2. Instant coffee and sugar can be dissolved because of the wetting properly

3. Water profiting materials are added to a fabric to increase the angle of contact thereby making the fabric water repellent.

6.State first law of thermodynamics. explain isothermal and adiabatic process.

->First law of thermodynamics: heat supplied to a system is first used to in increasing the internal energy and remaining heat is used in doing external work.

Isothermal process:  A process in which the temperature of the system or gas remains constant is known as a isothermal process. Isothermal process is possible when the gas is always in physical contact with a thermal reservoir source during its expansion or compression.
Adiabatic process: a process in which there is no addition or rejection of heat from the system or gas is known as the adiabatic process: adiabatic process is possible when the gas is thermally insulated from the surroundings during its compression or expansion.

7.State the three gas laws( Boyle's law,  Charles law and Gay-lussac's law).
->The three gas laws are:

 Boyle's law states that “ the volume of a given mass of gas is inversely proportional to the pressure at constant temperature”.

Charles law state that “ at constant pressure, the  the volume of a given mass of gas is directly proportional to its Absolute Temperature”.

Gay-Lussac’s Law states that ” at constant volume, the pressure of a gas is directly proportional to its Absolute Temperature”.

8.Explain mechanical and non mechanical waves with examples.
->Mechanical waves: waves which requires material medium for the propagation are called mechanical waves.

Examples

 1. Ripples produced on water surface.

 2. Waves produced in the Rope by moving one end up and down while the other end is fixed.

Non mechanical waves: where is used does not require synonym for the propagation are called non mechanical waves.

Examples: light waves, X-rays, radio waves,  heat waves.

9.Distinguish between longitudinal and transverse waves

10.Write any three advantages and two disadvantages of F.M.

->The advantages of frequency modulation are:

1. Modulus does not vary in this modulation.

2. The transmitted power remains the same.

3. There is a very low noise.

The disadvantages of frequency modulation are:

1. The demodulator is complicated.

2. The  spectral efficiency is low.

11.What is the principle of laser? write its properties.

the principle of laser is stimulated emission.
->Following are the important properties of lasers:

1. laser light is highly monochromatic( single frequency).

2. laser light is highly directional. it spreads very little as compared to ordinary light.

3. laser light is highly coherent.

4. laser light can be extremely intense and bright.

12.Write the basic concepts of batteries. mention any three application of batteries.
->The basic concept of the battery is to convert chemical energy into electrical energy so that they are used as source of electrical current at constant voltage.

The application of battery:

1. The primary cells are used in torches and flashlight.

2. The primary cells are used in electronic instrument such as calculators, transistor radios,wall clocks, toys excetra.

3. The secondary cells are used in Telephone and telegraphic offices.

13.What is meant by mineral and ore? write any three applications of pH.
->Mineral: The natural substance in which the metals and their compounds securing the earth's crust are called the minerals.

 Ore:  An Ore is a mineral from which a metal can conveniently, economically and profitably,  be extracted.

Applications of pH are:

1. In sugar industry the sugar cane juice should be kept neutral otherwise it will decompose giving unwanted products.

2. In pH of Boiler feed water should be about 7. the deviation of pH value results in acidic or basic nature will add the boiler material  corrosion.

3.In leather industry pH value reduce the bad odour during the tanning of the leather.

14.What are the composite materials? Write the advantages of composite materials.

->Composite materials: A composite material is the material formed from two or more components, resulting into special character for that material. it is designed to take the best properties of the two materials and produce a composite material of better quality.

Advantages of composite materials are:

1. They can be developed of specific strength and specific modulus characteristics.

2. Matrix and filters can be suitable reason to give required properties in various dimensions.

3. Smooth zero dynamic profiles can be developed.

15.Explain any two methods of polymerization.
->The two methods of  polymerization are:

1.Addition polymerization or chain growth polymerization: in this method, Polymers are formed by repeated addition of monomer molecules containing  double or triple bonds. the monomers used in this type or unsaturated compounds. addition polymerization involves and initiator for the reaction. examples of polymers formed by this method are polythene, Teflon, polystyrene etc.

2.Condensation polymerization of step growth polymerization: in this polymerization process, Polymers are formed by repeated condensation of two different bifunctional or trifunctional monomers with the elimination of simple molecules like water, methyl alcohol, ammonia, hydrogen chloride, etc. in this case the product of each step is a distinct bi-functional group.the Polymers formed by this processor nylon, terylene, bukelite  etc.