Chemical Engineering - Chemical Engineering Basics

16. 

Which of the following has the least oili-ness ?

A. Mineral oils
B. Vegetable oils
C. Greases
D. Animal oils

Answer: Option A

Explanation:

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17. 

Surface finish of casting does not depend upon the

A. sand fineness.
B. pattern finish.
C. mould dressings.
D. metal temperature.

Answer: Option D

Explanation:

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18. 

Load cells used for the measurement of weight has

A. compact & rugged construction with an accuracy of 0.1 to 1%.
B. no moving parts and incurs negligible deflection under load.
C. provision of thermal compensation and is hermetically sealed.
D. all 'a', 'b' & 'c'

Answer: Option D

Explanation:

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19. 

While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about __________ °C.

A. 1800
B. 2000
C. 2400
D. 3000

Answer: Option B

Explanation:

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20. 

For the Stoke's law to be valid in the case of a falling sphere in a fluid, the

A. Reynolds number (based on sphere diameter) should be < 1.
B. flow around the sphere should be in turbulent region.
C. sphere must be metallic.
D. fluid density should be constant.

Answer: Option C

Explanation:

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