Users Also Read
Read MCQ's/Objective questions
MCQ's Search Engine
Analog Electronics
Communication Systems
Digital Electronics
Electromagnetic Field Theory
Electronic Devices and Circuits
Materials and Components
Measurements and Instrumentation
Microprocessors
Microwave Communication
Networks Analysis and Synthesis
Power Electronics
Radio Receivers
Satellite Communication
Signals and Systems
Exam Questions Papers
Matching Questions
Home⇒ Engineering⇒
Automatic control systems
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q1 ⇒ Which of the following is not correct for two phase servomotor? Rotor resistance is low [other wrong options] [Discuss in forum] Rotor diameter is small Applied voltages are seldom balanced Torque speed curve is linear |
Q2 ⇒ The action of bellows is similar to that of spring [other wrong options] [Discuss in forum] mass viscous friction none of the above |
Q3 ⇒ One advantage of using polar plot is that it depicts the frequency response characteristics over the entire frequency. TRUE [other wrong options] [Discuss in forum] FALSE |
Q4 ⇒ Optical encoders most commonly used in control systems are incremental encoders [other wrong options] [Discuss in forum] absolute encoders secondary encoders none of the above |
Q5 ⇒ The pole-zero configuration of the given figure can be lag compensator [other wrong options] [Discuss in forum] lead compensator lead-lag compensator series compensator |
Q6 ⇒ In force voltage analogy the quantity analogous to spring constant K is 1/C [other wrong options] [Discuss in forum] R C L |
Q7 ⇒ Bellows converts pressure difference into displacement [other wrong options] [Discuss in forum] pressure difference into voltage displacement into pressure difference either (a) or (c) |
Q8 ⇒ An ac tachometer has a drag cup construction so that both (a) and (b) [other wrong options] [Discuss in forum] rotor inertia is low rotor body is conducting rotor is easy to fabricate |
Q9 ⇒ In an integral controller the rate of change of output is proportional to input [other wrong options] [Discuss in forum] the output is proportional to input the output is proportional to rate of change of input none of the above |
Q10 ⇒ The given figure shows log magnitude versus ω plots of a system for different values of gain. For this sy curve 1 shows poorest gain margin and curve 3 shows highest gain margin [other wrong options] [Discuss in forum] curve 1 shows highest gain margin and curve 2 shows poorest gain margin gain margins shown by the three curves are equal curve 3 shows poorest gain margin while curve 1 shows highest gain margin |
Q11 ⇒ In a minimum phase system all zeros lie in the left half plane [other wrong options] [Discuss in forum] all poles lie in the left half plane all poles lie in the right half plane all except one pole or zero lie in the left half plane |
Q12 ⇒ Which of the following are applications of position control systems? All of the above [other wrong options] [Discuss in forum] Control of sheet and metal thickness in hot rolling mill Missile guidance of ships Radar tracking system |
Q13 ⇒ The slope of log-magnitude asymptote changes by - 40 dB/ decade at a frequency ω1. This means that either a double pole or a pair of complex conjugate poles is present [other wrong options] [Discuss in forum] a double pole is present a pair of complex conjugate poles is present a pole or zero at origin is present |
Q14 ⇒ Assertion (A): When a PID controller is added to a system, the peak overshoot to step input cannot be determined easily. Reason (R): Use of PID controller introduces a zero in the forward path. Both A and R are correct and R is correct explanation of A [other wrong options] [Discuss in forum] Both A and R are correct but R is not correct explanation of A A is correct but R is wrong R is correct but A is wrong |
Q15 ⇒ For a quadratic factor in transfer function the phase angle is not a function of damping factor. FALSE [other wrong options] [Discuss in forum] TRUE |
Q16 ⇒ Consider the following sys System I has larger bandwidth and faster speed of response than System II [other wrong options] [Discuss in forum] System II has larger bandwidth and faster speed of response than System I System I has larger bandwidth but System II has faster speed of response System II has larger bandwidth but System I has faster speed of response |
Q17 ⇒ In a second order system with a unit step input, the speed of response is high if system is underdamped [other wrong options] [Discuss in forum] overdamped undamped system critically damped |
Q18 ⇒ For a stable system having two or more gain crossover frequencies the phase margin is measured at highest gain crossover frequency [other wrong options] [Discuss in forum] at lowest gain crossover frequency at the gain crossover frequencies none of the above |
Q19 ⇒ Derivative control action is effective? Only during transient state periods [other wrong options] [Discuss in forum] Only during steady state periods During both steady state and transient state periods Either during steady state or during transient state periods |
Q20 ⇒ A stepper motor is essentially a synchronous motor [other wrong options] [Discuss in forum] induction motor dc motor either (b) or (c) |
Or |