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286. Mineral waxes are rich in
A. Carbohydrates
B. Poly ethers
C. Hydrocarbons
D. Poly alcohols
Explanation:
287. A microprocessor is
A. a whole computer contained in an Integrated circuit (IC) chip.
B. the Arithmetic and Logic Unit (ALU) of a computer contained in a single IC chip.
C. the Central Processing Unit (CPU) of a computer contained in a single IC chip.
D. the Complete Memory Unit of a computer contained in a single IC chip.
Explanation:
288. F-lb is a/an
A. game
B. refrigerant
C. drug
D. aircraft
Explanation:
289. Railway tracks are banked on curves so that
A. the train may not fall down inwards.
B. necessary centrifugal force may be obtained from teh horizontal component of the weight of the train.
C. no frictonal force may be produced between the track and the wheels.
D. the weight of the train may be reduced.
Explanation:
290. Most of the desert plants bloom during night time because
A. the desert insects are active during night time.
B. they are sensitive to the phases of moon.
C. the desert insects eat away flowers during daytime.
D. their blooming is controlled by low temperature.
Explanation:
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