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.Management Sciences
Category: CHEMICAL ENGINEERING
Starting material for the production of styrene butadiene rubber (SBR) is________________?
A. Ethyl alcohol
B. Ethylene
C. Both A. & B.
D. Neither A. nor B.
Thermosetting polymers as compared to thermoplastic polymers_____________________?
A. Are formed by addition polymerisation
B. Have three dimensional structure
C. Have linear structure
D. None of these
Steel balls for ball bearings are generally made of ______________ steel?
A. Cast
B. Stainless
C. Free carbon
D. Carbon chrome
Bleaching action of bleaching powder is due to its _____________ properties ?
A. Reducing
B. Oxidising
C. Disinfecting
D. None of these
Which of the following is not an acidic refractory?
A. Silica bricks
B. Fireclay bricks
C. Bauxite bricks
D. Magnesia bricks
The speed of a sound wave in a gas is analogous to the speed of ______________________?
A. An elementary wave in an open channel
B. Flow in an open channel
C. A disturbance travelling upstream in moving fluid
D. None of these
Lap joints are preferred for plates having thickness _______________ mm?
A. < 12.5
B. > 3
C. > 5
D. 5-10
Pick out the wrong statement/
A. The emissivity of a surface decreases, if it gets corroded by atmospheric environment
B. The emissivity of a surface increases with increase in surface roughness
C. The emissivity of a polished surface is quite low
D. The emissivity of a non-metallic surface decreases with increase in the temperature
Refractoriness/fusion points of ‘Superduty’ refractories is _______________ °C?
A. 1520-1630
B. 1630-1670
C. > 1730
D. > 2000
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