Instrumentation and Control Objective Questions and Answers

71. Dynamometers are :

72. In some measurements, in order to increase the sensitivity, two measuring and two reference cells are often used. This arrangement is usually referred to as :

A. Wheatstone bridge

73. Paramagnetic analyser is used to measure following gas sample in air

74. Continuous analysers for measuring following are based on the chemiluminescent nameless reaction with ethylene

75. Industrial flow meters are based on

A. Rotational devices

B. Flow through restrictions

C. Flow around obstructions

D. All of above

Discussion

76. Chromatographic analyser is used to measure the

A. 02 content in flue gases

B. CO2 content in flue gases

C. CO content in flue gases

D. (a) amount of individual gases in a mixture

Discussion

77. The pH value is a measure of hydrogen ion in a solution. The letters pH stand for :

A. Percentage of H2 in solution

B. Power of the hydrogen ion concentration

C. Presence of hydrogen ions

D. Purity of H2O

Discussion

Mechanical Engineering Objective Questions { Instrumentation and Control }