2651: What does the term Dolby B, or Dolby C printed on tape recorders and other sound system refer to?
(a) Frequency modulated system
(b) Amplitude modulated system
(c) Noise reduction circuit
(d) Both DC and AC power can be used.
2652: An accurate clock shows the time as 3.00. After hour hand has moved 135°, the time would be
(a) 7.30
(b) 6.30
(c) 8.00
(d) 9.30
2653: The given diagram shows the number of students who failed in an examination comprising papers in English, Hindi and Mathematics. The total number of students who took the test is 500. What is the percentage of students who failed in at least two subjects ?
(a) 6.8
(b) 7.8
(c) 34
(d) 39
2654: A genetically engineered form of brinjal Known as the Bt-brinjal has been developed. The objective of this is
(a) To make it drought-resistant
(b) To make its shelf-life longer
(c) To improve its taste and nutritive qualities
(d) To make it pest-resistant
2655: Cape Canaveral, the site from which space shuttles are launched is located on the coast of
(a) Virginia
(b) Florida
(c) South Carolina
(d) North Carolina