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MCQs

Total Questions : 100 | Page 10 of 10 pages
Question 91. Which type of control valve can be used for 90-degree change in direction of flow?
  1.    Butterfly valve
  2.    Diaphragm valve
  3.    Globe valve
  4.    Gate valve
 Discuss Question
Answer: Option C. -> Globe valve
Answer: (c).Globe valve
Question 92. Which of the following is not a type of control butterfly valve?
  1.    Single off-set
  2.    Concentric
  3.    Triple off-set
  4.    Concentric centreline
 Discuss Question
Answer: Option B. -> Concentric
Answer: (b).Concentric
Question 93. Which type of valve is preferred for sequential operations?
  1.    Electric actuated control valve
  2.    Single acting control valve
  3.    Quick opening valve
  4.    Double acting control valve
 Discuss Question
Answer: Option C. -> Quick opening valve
Answer: (c).Quick opening valve
Question 94. What is inherent flow characteristics?
  1.    The curve obtained between control valve capacity and valve stem travel
  2.    The curve obtained between control valve capacity and Cv
  3.    The curve obtained between Cv and valve stem travel
  4.    The curve obtained between control valve capacity and pressure drop
 Discuss Question
Answer: Option A. -> The curve obtained between control valve capacity and valve stem travel
Answer: (a).The curve obtained between control valve capacity and valve stem travel
Question 95. Which of these is a linear motion control valve?
  1.    Ball valve
  2.    Butterfly valve
  3.    Plug valve
  4.    Diaphragm valve
 Discuss Question
Answer: Option D. -> Diaphragm valve
Answer: (d).Diaphragm valve
Question 96. Which of these control valves has the lowest pressure recovery?
  1.    Globe valve
  2.    Ball valve
  3.    Butterfly valve
  4.    Plug valve
 Discuss Question
Answer: Option A. -> Globe valve
Answer: (a).Globe valve
Question 97. Which type of actuator is preferred when high and fast stroking speed is required?
  1.    Direct acting actuator
  2.    Reverse acting actuator
  3.    Electro hydraulic actuator
  4.    Piston actuator
 Discuss Question
Answer: Option D. -> Piston actuator
Answer: (d).Piston actuator
Question 98. Direct acting actuators fall under which category of actuator?
  1.    Diaphragm actuator
  2.    Piston actuator
  3.    Electro hydraulic actuator
  4.    Manual actuators
 Discuss Question
Answer: Option A. -> Diaphragm actuator
Answer: (a).Diaphragm actuator
Question 99. What should be the rangeability of the control valve?
  1.    Gain
  2.    Cv
  3.    Turndown
  4.    Stoke%
 Discuss Question
Answer: Option C. -> Turndown
Answer: (c).Turndown
Question 100. The gain of a control valve should never be less than _______
  1.    1
  2.    5
  3.    0.5
  4.    0.75
 Discuss Question
Answer: Option C. -> 0.5
Answer: (c).0.5

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