Correct Answer:
(B)
Pulicat lake
Sriharikota is a barrier island in the Andhra Pradesh. It is most famous as the home of India's only satellite launch centre. Sriharikota divides the Pulicat Lake from the Bay of Bengal.
Ques:
12
Consider the following statements in respect of a jet engine and a rocket:
A jet engine uses the surrounding air for its oxygen supply and so is unsuitable for motion in space.
A rocket carries its own supply of oxygen in the gas form and fuel.
Which of the statements given above is/are correct?
Correct Answer:
(C)
Both 1 and 2
Jet engines and rockets work on the same principle. They produce thrust through an internal pressure difference and as explained by Newton's third law of motion, eject exhaust gases in an equal and opposite direction. The main difference between them is that Jets get the oxygen to burn its fuel from the air and rocket carries their own oxygen as liquid or gas propellant which allows them to operate in space.
Ques:
13
Rocket works on the principle of the following:
Correct Answer:
(C)
Momentum conservation
An electric rocket engine is a jet engine in which material ejected backward (ionized gas in general) causes a forward thrust to the rocket (principle of momentum conservation). The linear momentum (p) or simply momentum of a particle is the product of its mass and its velocity [ i.e., p = mv].
Ques:
14
Stratellite is the:
Correct Answer:
(C)
High altitude airship positioned in the stratosphere
Stratellite is the high-altitude airship positioned in the strato- sphere and carries one or more repeaters to create wireless communication networks. A stratellite is similar to a satellite, but is stationed in the stratosphere rather than in the orbit.