Recent questions tagged control

1 answer 9 views

What are the disadvantages of Open loop control system?

asked Jul 4 by Shimroz123
1 answer 29 views

Draw and explain bulk correction method for power factor & control.

asked Sep 29, 2018 in Energy Conservation And Audit by Shimroz123
1 answer 9 views

State the function of following components of a nuclear power station: i) Moderator ii) Shielding iii) Control rod iv) Coolant 

asked Sep 8, 2018 by Shimroz123
1 answer 7 views

Write function of control rods in nuclear power plant.

asked Sep 7, 2018 by Shimroz123
1 answer 19 views

Write one advantage and one disadvantage each for spring control method and gravity control method.

asked Sep 6, 2018 by Shimroz123
1 answer 4 views

State the function of former and control spring in PMMC instrument.

asked Sep 6, 2018 by Shimroz123
1 answer 26 views

Describe spring control method of producing controlling torque in measuring instrument. Write any two properties required for spring material.

asked Sep 6, 2018 by Shimroz123
1 answer 2 views

Explain spring control method with neat diagram.

asked Sep 5, 2018 by Shimroz123
1 answer 9 views

Quality control is aimed at: a. Maintaining the desired quality b. Exceeding the desired quality c. Continuously improving the quality d. Following the quality

asked Aug 31, 2018 by Shimroz123
1 answer 24 views

A control system having unit damping factor will give  (1) Oscillatory response (2) Undamped response (3) Critically damped response (4) No response

asked May 1, 2018 in Electrical Measurements and Instrumentation by Shimroz123
1 answer 38 views

The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque  (1) Decreases (2) Increases (3) Remains constant (4) None of the above

asked May 1, 2018 in Electrical Machine by Shimroz123
1 answer 17 views

A differentiator is not usually used in control system, because it : - (A) reduces damping  (B) increases error  (C) reduces gain margin  (D) increases input noise

asked Apr 30, 2018 in Control System by Shimroz123
1 answer 44 views

The meter which does not have any component in it to provide control torque is (A) Electrodynamometer for current measurement (B) Electrodynamometer for voltage measurement (C) Electrodynamometer for power measurement. (D) Electrodynamometer for power factor measurement.

asked Apr 28, 2018 in Electrical Measurements and Instrumentation by Shimroz123
1 answer 26 views

A unity negative feedback control system is found to have a gain margin of 20 dB. The Nyquist plot of the system (A) crosses the real axis at +0.1 (B) crosses the real axis at -0.1. (C) crosses the imaginary axis at -0.1 (D) crosses the imaginary axis at +0.1

asked Apr 28, 2018 in Control System by Shimroz123
1 answer 24 views

Precise control of reactive current flow entering the transmission and distribution systems can be minimized by using (A) synchronous condenser (B) static VAR capacitor (C) capacitor bank (D) thyristor switched reactor in parallel with capacitor

asked Apr 28, 2018 in Power system by Shimroz123
1 answer 39 views

Regulating-transformers are used in power systems for control of

asked Apr 26, 2018 in Switchgear And Protection by Shimroz123
1 answer 15 views

Negative feedback in a closed-loop control system DOES NOT (A) reduce the overall gain (B) reduce bandwidth (C) improve disturbance rejection (D) reduce sensitivity to parameter variation

asked Apr 26, 2018 in Control System by Shimroz123
1 answer 27 views

The standard for long distance analog signal transmission in process control industry is (A) 4-20 mV (B) 0-20 mA (C) 4-20 mA (D) 0-5 V

asked Apr 26, 2018 in Control System by Shimroz123
0 answers 95 views

What is a phase control thyristor?

asked Mar 19, 2018 in Thyristor by Quiz
0 answers 25 views

Explain series switching control of AC load. Single phase resistance load - Integral half cycle control Phase control - Resistance load

asked Mar 11, 2018 in Power Electronics by Quiz
0 answers 44 views

Explain the pulse width modulation technique for control of AC output voltage.

asked Mar 10, 2018 in Power Electronics by Quiz
0 answers 16 views

What are the electromagnetic waves used in remote control?

asked Mar 10, 2018 in Engineering electromagnetic by Quiz
0 answers 17 views

What is control and automation?

asked Mar 10, 2018 in Control System by Quiz
0 answers 17 views

What is the automatic control system?

asked Mar 10, 2018 in Control System by Quiz
1 answer 29 views

What are the advantages of open loop control system?

asked Mar 10, 2018 in Control System by Quiz
0 answers 18 views

What are the different types of control systems?

asked Mar 10, 2018 in Control System by Quiz
0 answers 63 views

What is the difference between a line voltage and low voltage control system?

asked Mar 10, 2018 in High voltage engineering by Quiz
1 answer 488 views

Explain the principle of ON-OFF control and phase control of AC voltage controller with suitable circuit and waveforms.

asked Feb 14, 2018 in Unit 6 by Quiz
1 answer 42 views

What is HT and LT control panels?

asked Dec 16, 2017 in Extra high voltage transmission by Quiz
2 answers 91 views

What are the speed control methods of dc motor?

asked Dec 16, 2017 in Electrical Machine by Quiz
1 answer 32 views

Problem number 6.30 from digital control and state variable methods by M Gopal (second edition)

asked Sep 26, 2017 in digital control and state variable methods by M Gopal by Quiz
2 answers 55 views

Armature control of DC motor

asked Aug 9, 2017 in Electrical Machine by Zeeshan
2 answers 23 views

Field control of DC motor

asked Aug 9, 2017 in Electrical Machine by Zeeshan
2 answers 57 views

speed control methods of three phase induction motor?

asked Aug 9, 2017 in Electrical Machine by Zeeshan
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