1751: The main constituents of pearl are
(a) calcium carbonate and magnesium carbonate
(b) aragonite and conchiolin
(c) ammonium sulphate and sodium carbonate
(d) calcium oxide and ammonium chloride
1752: A passing motorcycle causes distortion or disturbance with reception of signal in radio and T.V. The cause of this is
(a) The intense sound waves effect the small electronic devices of the receptor
(b) The vehicle's metal parts block/distort the radio waves
(c) The spark plug fitted in the engine produces electro-magnetic signals due to sparking
(d) Modern motor-cycles are fitted with electric ignition system which produces radio waves
1753: What does S & P 500 relate to ?
(a) A new technique in e-business
(b) Supercomputer
(c) An index of stocks of large companies
(d) A new technique in bridge building
1754: Recently, a series of uprisings of people referred to as `Arab Spring originally started from
(a) Egypt
(b) Lebanon
(c) Syria
(d) Tunisia
1755: NABARD, which is set up to provide loans for rural development, is a:
(a) Bank
(b) Board
(c) Block
(d) Department