Chemical Engineering - Chemical Engineering Basics

16. 

Difference at any instant between the value of the controlled variable and the set point is called the

A. deviation
B. derivative time
C. error ratio
D. differential gap

Answer: Option A

Explanation:

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17. 

The expected efficiency of a single rivetted lap joint is of the order of 50%. If the thickness of the plate is increased four times, then the rivet diameter will have to be increased __________ times.

A. two
B. four
C. six
D. eight

Answer: Option A

Explanation:

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18. 

Nickel and __________ are the alloying element added in steel to increase its toughness.

A. molybdenum
B. chromium
C. vanadium
D. silicon

Answer: Option D

Explanation:

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19. 

Which of the following equipments is used for liquid dispersion ?

A. Packed column
B. Venturi scrubber
C. Bubble cap plate column
D. Wetted wall column

Answer: Option B

Explanation:

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20. 

Eutectoid composition of carbon steel at room temperature is

A. cementite
B. pearlite
C. martensite
D. ferrite

Answer: Option B

Explanation:

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