Chemical Engineering - Chemical Engineering Basics

46. 

Direct conversion of thermal energy to electrical energy is facilitated by the

A. fuel cells.
B. photo voltaic cell.
C. magneto hydrodynamic generator.
D. none of these.

Answer: Option C

Explanation:

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47. 

The minimum carbon content in steel should be __________ percent for it to respond to a hardening treatment.

A. 0.2
B. 0.4
C. 0.6
D. 0.8

Answer: Option A

Explanation:

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48. 

Angular displacement can be measured suitably by a

A. shaft encoder.
B. linear variable differential transducer (LVDT).
C. stroboscope.
D. tachometer.

Answer: Option A

Explanation:

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49. 

Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air.

A. wet bulb
B. dry bulb
C. saturation
D. dew point

Answer: Option A

Explanation:

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50. 

Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by

A. conduction
B. convection
C. both 'a' & 'b'
D. radiation

Answer: Option D

Explanation:

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