Chemical Engineering - Chemical Engineering Basics

1. 

Which of the following is capable of acting both as an acid flux as well as a basic flux in the metal extraction from its ore ?

A. Silica
B. Lime
C. Alumina
D. Fluorite

Answer: Option C

Explanation:

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2. 

Which is the most suitable joint for the pipes, with are laid submerged under water, where the bottom of the river bed is uneven ?

A. Collar joint
B. Flexible joint
C. Flanged joint
D. Expansion joint

Answer: Option B

Explanation:

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3. 

Floating control action

A. moves the final control element at constant speed in either direction in response to an error signal.
B. changes the position of the final control element from on to off.
C. is used to counteract rapid load changes.
D. none of these.

Answer: Option A

Explanation:

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4. 

Boiler rating is normally done in terms of

A. steam temperature & pressure.
B. steam output (tons/hr).
C. heat transfer rate (kcal/hr).
D. heat transfer area (m2).

Answer: Option B

Explanation:

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5. 

The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe)

A. A
B. D
C. 1/A
D. 1/A2

Answer: Option C

Explanation:

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