Sudden fall of atmospheric pressure by a large amount is an indication of the
rain
cold wave
storm
fair weather
Correct answer is C
No explanation has been provided for this answer.
Which of the following fastening devices has a head at one end and a nut fitted to the other ?
Bolt
Stud
Top bolt
None of these
Correct answer is B
No explanation has been provided for this answer.
Energy of the sun arises mainly from __________ reactions.
fusion
fission
combustion
none of these
Correct answer is A
No explanation has been provided for this answer.
Corrosion of metals can not be prevented by its
tempering
chromising
aluminising
alloying
Correct answer is A
No explanation has been provided for this answer.
Electrical conductivities of semi-conductors are of the order of __________ ohm/cm.
10-3
103
10-15
l015
Correct answer is A
No explanation has been provided for this answer.
The product out from a cupola is called
wrought iron
pig iron
cast iron
none of these
Correct answer is C
No explanation has been provided for this answer.
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