Chemical Engineering - Chemical Engineering Basics

21. 

__________ iron is produced by the annealing of white cast iron.

A. Malleable
B. Nodular
C. Ductile
D. Grey

Answer: Option A

Explanation:

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22. 

The mechanism which changes the value of manipulated variable in response to the output signal from the control unit is called the

A. final control element.
B. on-off control.
C. floating control action.
D. none of these.

Answer: Option A

Explanation:

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23. 

Fahrenheit and Centigrade scales have the same readings at

A. -55°
B. -40°
C. -33°
D. -58°

Answer: Option B

Explanation:

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24. 

Which of the following low melting alloy containing bismuth and lead is used for electric fuse ?

A. Wood's metal
B. Babbit metal
C. Monel metal
D. Duralumin

Answer: Option A

Explanation:

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25. 

Water-tube boiler is the one, in which

A. water passes through tubes and flue gases around it.
B. tube carrying hot flue gases are immersed in a pool of water.
C. tubes are placed in vertical position.
D. none of these.

Answer: Option A

Explanation:

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