1. Water is heated in a kettle. The inside water is heated by convection. A person sitting near the fire receives heat by :
a) Conduction
b) Convection
c) Radiation
d) Reflection
e) None of these
2. A time can come when we will be able to design a machine which can go on working for ever without the expenditure of energy. Is it possible ?
a) No
b) Yes
c) In due course time
d) Very soon
e) None of these
3. The measurement of rainfall is made by an instrument known as :
a) Hydrometer
b) Barometer
c) Hygrometer
d) Pedometer
e) None of these
4. Light year is a unit of :
a) Distance
b) Time Period
c) Light intensity
d) Time
e) none of these
5. Three elements needed for the healthy growth of plants are :
a) N,P,K
b) N,C,P
c) N,K,C
d) N,S,P
e) none of these
6.Copper can be converted into gold by :
a) Heating
b) Artificial Radioactivity
c) Electroplating
d) Chemical reaction
e) None of these
7. In winter an iron pipe feel colder than a wooden window . This is because wood is :
a) Conductor
b) non-Conductor
c) Semi- Conductor
d) Not a solid while iron is a solid
e) None of these
8. The echo (reflected sound) will be distinctly heard only at ordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least :
a) 1120 ft
b) 120 ft
c) 56fft
d) 100 ft
e) None of these
9. It is possible to recognize a person in the dark by simply hearing his unique voice . It is because of the:
a) pitch
b) Frequency
c) Time period
d) Quality
e) None of these
10. When a ray of sunlight enters a dark room , its straight path become visible because of dust particles hanging in the air. It is because light is :
a) Visible
B) Transparent
c) Invisible
d) opaque
e) None of these
11. A six feet tall lady wants to see her full image in a plane mirror . The minimum length of the mirror will be :
a) 6 feet
b) 12 feet
c) 4 feet
d) 3 feet
e) None of these
12. The principle used in radar is the same as that of Sonar. In radar we use radio waves ; whereas in sonar we use :
A) red waves
b) Infrared waves
c) Ultrasonic
d) super sonic
e) None of these
13. In a fission nuclear reaction , a heavy nucleus breaks up into smaller nuclei whereas in another nuclear reaction two or more than two possibly nuclei are fused to form a heavy nucleus This nuclear reaction is called :
a) Chemical Reaction
b) Nuclear reaction
c) Fission nuclear reaction
d) Fusion nuclear reaction
e) None of these
14. Parsec is a unit of :
a) Energy
b) Time
c) Power
d) Distance
e) None of these
15. German Silver is an alloy of:
A) Zn + Ni
b) Cu + Zn
c) Cu + Ni
d) Cu + Sn
e) None of these
16. The Continent Antarctica lies at the:
a) North pole
b) South pole
c) middle of the earth
d) Equator
e) None of these
17. The temperature of the dead body is:
a) 0 ‘C
b) 37 ‘
c) room temperature
d) temperature of the place where it is kept
e) None of these