Process Instrumentation and Control - Interview Questions | Exam2Win

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101. Chromatographic analyser is used to measure the :

A. 02 content in flue gases

B. C02 content in flue gases

C. CO content in flue gases

D. amount of individual gases in a mix�ture

E. amount of elements in an alloy.

Explanation:

102. Pure water has pH value of 7. This means that pure water has :

A. 7 g of ionized hydrogen per litre

B. 10 g of ionized hydrogen in/m

C. 1CT7 % of ionized hydrogen

D. 10"7 g of ionized hydrogen per litre

E. none of the above.

Explanation:

103. The range of values through which the variable must change to cause the final control element to move from one extreme position to the other :

A. throttling range

B. disturbance

C. proportional band

D. response

E. deviation.

Explanation:

104. The pH value is a measure of hydrogen ionin a solution. The letters pH stand for :

A. percentage of H2 in solution

B. power of the hydrogen ion concentra-tion

C. presence of hydrogen ions

D. purity of H20

E. none of the above.

Explanation:

105. In capillary viscometer, viscosity is proportional to :

A. flow

B. 1/flow

C. Vflow

D. 1/Vfl ow

E. 1/flow3/2.

Explanation: