21. Which of the following is most elastic ?
A. Steel
B. Rubber
C. Glass
D. Sponge
e. None of these
22. Orbital period of the planet Mercury around the sun is:
A. 88 days
B. 365 days
C. 2 years
D. 98 days
e. None of these
23. The most splendid and the most magnificient constellation on the sky is:
A. Orion
B. Columbia
C. Canis Major
D. Taurus
e. None of these
24. “Black holes” refer to:
A. Hole occurring in heavenly bodies
B. Bright spots on the sun
C. Collapsing objects of high density
D. Collapsing of low density
e. None of these
25. Eugenics is the study of:
A. Altering human beings by changing their genetic components
B. People of European region
C. Different races of mankind
D. Genetic of plants
e. None of these
26. The position of earth in its orbit, when it is at its greatest distance from the sun causing northern summer is called:
A. Aphelion
B. Perihelion
C. Perigee
D. Apogee
e. None of these
27. Diamond is a very expensive ornament. It is composed of a single element:
A. Carbon
B. Gold
C. Silver
D. Platinum
e. None of these
28. Which of the following layers make radio transmission possible?
A. Troposphere
B. Ionosphere
C. Mesosphere
D. Stratosphere
e. None of these
29. Which of the following explains the reason why there is no total eclipse of the sun?
A. Size of the earth in relation to that of moon
B. Orbit of moon around earth
C. Direction of rotation of earth around sun
D. Area of the sun covered by the moon
e. None of these
30. Television signals are converted into light signals by:
A. Optical fiber
B. Transistor
C. Decoder
D. Photo diode
e. None of these
31. Where do most of Asteroids lie?
A. In asteroid belt between the orbits of Mars and Jupiter
B. In asteroid belt between the orbits of Mars and Venus
C. In asteroid belt between the orbits of Jupiter and Venus
D. Everywhere in the sky
e. None of these
32. The number of spark plugs needed in a diesel engine is:
A. 2
B. 3
C. 0
D. 4
e. None of these
33. The half life of a radioactive element is 8-days. How long it take to reduce it from 10 mg to 5 mg?
A. 4 days
B. 12 days
C. 16 days
D. 8 days
e. None of these
34. The term ‘Blue Shift’ is used to indicate:
A. Doppler effect in which an object appears bluer when it is moving towards the observer or observer is moving towards the object.
B. Turning a star from white to blue
C. In future sun would become blue
D. Black hole was blue at its start
e. None of these