Home > General Knowledge > General Science

General Science - Questions and Answers

Practice questions on General Science.

Ready to test your skills?

Take a timed mock test specifically for General Science.

Start Mock Test
1571. Consider the following statements about a thermos flask : 1. It is a practical device in which the heat flowing into or out of the system by conduction, convection or radiation is reduced as much as possible2. It consists of a double walled glass vessel3. The heat transfer by convection is minimised by silvering the surfaces and the radiation is minimised by evacuating the space between the walls.
A. 1 and 2
B. 2 and 3
C. 1 and 3
D. 1, 2 and 3
Explanation:
1572. Lightning is formed when :
A. similar charges of electricity rush towards each other and then get repelled
B. clouds strike against impurities in air and the friction burns up these impurities
C. strong opposite charges in different clouds break down the resistance offered by the intervening air .
D. water vapour produces electricity in the clouds.
Explanation:
1573. Remote Sensing Satellites are called Polar Satellites because :
A. they orbit the earth along the poles or from pole to pole
B. they are fixed at a particular point.
C. the axis of satellite is always pointed towards the pole
D. none of the above
Explanation:
1574. A remote control gadget has in it :
A. a small electromagnet, that emits electromagnetic waves
B. a small oscillator that emits electric pulses
C. a small transitter that emits infrared signals
D. none of these
Explanation:
1575. Ball bearings are used to reduce friction by :
A. applying lubricants to the balls used
B. reducing the area of cntact with the use of metallic balls
C. increasing the area of contact with the use of metallic balls
D. none of these
Explanation:
« Prev123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483Next »