Instrumentation Specialist

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“Instrumentation Specialist based Frequently Asked Questions by expert members with experience as Instrumentation Specialist. These questions and answers will help you strengthen your technical skills, prepare for the new job test and quickly revise the concepts”



109 Instrumentation Specialist Questions And Answers

104⟩ Explain what is solenoid valve? Where it is used?

A solenoid is electrically operated valve. It consists of solenoid coil in which magnetic plunger moves. This plunger is connected to the plug and tends to open or close the valve. There are two types of solenoid valves:

1. Normally Open

2. Normally closed

Use: It is used for safety purpose in different electric work

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105⟩ Tell me what is the use of single seated valve?

The single seated valve is used on smaller sizes where an absolute shut off is required. The use of single seated valve is limited by pressure drop across the valve in the closed or almost closed position.

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108⟩ Explain how pressure limit switch occurs?

A pressure switch typically consists of a spring-loaded plunger actuated by process pressure to operate a micros witch. The pressure at which the micro switch operates is dependent upon spring force, which may be varied by an adjusting nut.

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109⟩ Explain what is the use of double seated valve?

In double seated valves the upward and downward forces on the plug due to reduction of fluid pressure are nearly equalized. It is generally used on bigger size valves and high pressure systems. Actuator forces required are less.

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