Chapter No.: 4: Control Valves
1) What is manual valve and control valve?
2) List the functions of control valve.
3) Define control valve terminology.
4) Why control valve is required?
5) Draw cut-section of control valve.
6) Explain basic parts of control valve.
7) List types of control valve based on control action.
8) Explain direct acting air to open (Normally Closed (NC) type) control valve.
9) Explain direct acting air to close (Normally Open (NO) type) control valve.
10) Explain reverse acting air to open (Normally Closed (NC) type) control valve.
11) Explain reverse acting air to close (Normally Open (NO) type) control valve.
12) Explain types of control valve based on power supply.
13) Explain control valve flow characteristics with respect to plug design.
14) What is difference between installed flow characteristic of a valve and inherent flow characteristic of a control valve?
15) List classification of control valve.
16) List selection criteria of control valve.
17) List different methods for controlling flow through valve.
18) Explain valve end connection in details.
19) Explain solenoid valve with respect to construction, advantages, disadvantages and applications.
20) Explain butterfly valve with respect to construction, advantages, disadvantages and applications.
21) Explain gate valve with respect to construction, advantages, disadvantages and applications.
22) Explain ball valve with respect to construction, advantages, disadvantages and applications.
23) Explain glob valve with respect to construction, advantages, disadvantages and applications.
24) Explain plug valve with respect to construction, advantages, disadvantages and applications.
25) Explain pinch valve with respect to construction, advantages, disadvantages and applications.
26) Explain check valve with respect to construction, advantages, disadvantages and applications.
27) Explain diaphragm valve with respect to construction, advantages, disadvantages and applications.
28) Explain needle valve with respect to construction, advantages, disadvantages and applications.
29) Explain safety valve and pressure relief valve in details.
30) Compare single port and double port control valve.
31) Define trim, control valve capacity, control valve rangeability, coefficient of the control valve (CV).
32) What do you mean by Flashing? Explain the problems associated with the control valve due to Flashing.
33) What is cavitation? Explain the noise problems associated with the control valve and their remedies.
34) Explain the pressure drop requirements for a good control valve and also explain how it controls flow?
35) Which are safety considerations we follow in control valve design and operation?
36) Explain control valve check out procedure.
37) What is positioner? List difference between single acting and double acting positioner.
38) Why we are using control valve with positioner?
39) Explain pneumatic type force to balance positioner.
40) Explain pneumatic type motion to balance positioner.
37) Explain linear type and rotary type positioner.
38) Explain smart positioner.
39) Explain how to calibrate control valve.
40) What is an actuator? Classify the actuators of control valves and explain them in brief with the diagram.
41) Write down the advantages and disadvantages of Electrical, Pneumatic and Hydraulic type actuators.
42) Explain Electro-Pneumatic Valve Positioner.
43) Explain Rupture discs in the details.
Chapter No.: 5: Signal Converting Elements:
1) Explain Pneumatic to Electrical converters with applications.
2) Explain Electric to Pneumatic converter with applications.
3) Explain Voltage to Current converter with applications.
4) Explain Current to Voltage converter with applications.
5) Explain Frequency to Voltage converter with applications.
6) Explain Voltage to Frequency converter with applications.
Chapter No.: 6: Indicators, Recorders and Annunciators
1) What is indicator? List and Explain types of indicators.
2) What is recorder? List and Explain types of recorders.
3) What is Annunciator? List and Explain types of annunciators.
4) Explain microprocessor based annunciator.
5) Explain strip chart recorder in details.
6) Explain x-y recorder in details.
Chapter No.: 7: Transmitter:
1) List Pneumatic Type Transmitters? Explain any one.
2) Explain Force Balance Pressure Transmitter.
3) Explain Motion Balance Transmitter. Explain Motion Balance Transmitter.
4) Draw diagram of force balance transmitter.
5) Compare Force balance Transmitter with Direct Nozzle Circuit with force balance transmitter with differential nozzle circuit.
6) Write the advantage of Motion Balance Transmitter over Force Balance Transmitter.
7) Write the advantage of Motion Balance Transmitter over Force Balance Transmitter.
8) Draw Block Diagram of Smart Transmitter and explain it.
9) Discuss Smart Transmitter and write its Advantage and Disadvantage.
10) Explain Two-wire Electronic Transmitter.
11) What is Four-wire Electronic Transmitter? Write one application for it.
12) Compare Two-wire & Four wire Electronic Transmitter.
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