Question #1. If the gain of the critical damped system is increased it will behave as
(a) oscillatory
(b) critically damped
(c) overdamped
(d) underdamped
(e) none of the above
Answer: (d) underdamped
Question #2. technique gives quick transient and stability response
(a) Root locus
(b) Bode
(c) Nyquist
(d) Nichols
Answer: (a) Root locus

Question #3. On which of the following factors does the sensitivity of a closed loop system to gain
changes and load disturbances depend ?
(a) Frequency
(b) Loop gain
(c) Forward gain
(d) All of the above
Answer: (d) All of the above

Question #4. Phase margin of a system is used to specify which of the following ?
(a) Relative stability
(b) Absolute stability
(c) Frequency response


1. The process known as signal compression is used with a(n) ____ amplifier.
A) log
B ) instrumentation
C)  Antilog
D) isolation

Answer: B ) instrumentation

2. An automatic toaster is a ______ loop control system.
A) open
B) closed
C) partially closed
D) any of the above

Answer: A) open

3. Instrumentation amplifiers are normally used to measure
A) small differential signal voltages
B) signals superimposed on a common-mode voltage often much larger than the signal voltage
C) both of the above
D) none of the above

Answer: A) small differential signal voltages

4. What is the function of a ladder network?
A)Changing a digital signal to an analog
B) Changing a linear signal to a digital
C)   Changing an analog signal to a digital
D) None of the above

Answer: A)Changing a digital signal to an analog

5. Which of the following devices are commonly used as error detectors in instruments ?
A) Vernistats
B) Microsyns
C) Resolvers
D) Any of the above

Answer: d) Any of the above


Question #1:-Which among the following substance is most elastic ?
 Correct Answer:- Option-A

Question #2. Any externally introduced signal affecting the controlled output is called a
(a) feedback
(b) stimulus
(c) signal
(d) gain control
 Correct Answer:-: Option B

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Question #3:-An increase in load at the free end of a cantilever is likely to cause failure
 A:-At fixed support end
 B:-Free end
 C:-Mid of its length
 D:-Any where
 Correct Answer:-Answer:- Option-A

Question #4. A.C. servomotor resembles
(a) two phase induction motor
(b) Three phase induction motor
(c) direct current series motor
(d) universal motor
 Correct Answer:- Option-A

Question #5:-Electronic components are usually joined by
 Correct Answer:- Option-C

Question #6. The band width, in a feedback amplifier.
(a) remains unaffected
(b) decreases by the same amount as the gain increase
(c) increases by the sane saaaajajt as the gain decrease
(d) decreases by the same amount as the gain decrease
 Correct Answer:-Option-C

Question #7:-Identify the hardest tool material
 C:-Tungston carbide
 Correct Answer:- Option-D

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Question #8. In liquid level and electrical system analogy, voltage is considered analogous to
(a) head
(b) liquid flow
(c) liquid flow rate
(d) none of the above
 Correct Answer:-Option-A

Question #9:-One ton of refrigeration is equivalent to
 A:-1 kW
 B:-2 kW
 C:-3.5 kW
 D:-100 kW
 Correct Answer:- Option-C

Question #10. The type 1 system has ______ at the origin.
(a) no pole
(b) net pole
(c) simple pole
(d) two poles
 Correct Answer:-Option-C
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1. Strain type insulator arc used where the conductors arc
(A) dead ended
(B) at intermediate anchor towers
(C) any of the above
(D) none of the above.
2. Conductors for high voltage transmission lines are suspended from towers
(A) to reduce clearance from ground
(B) to increase clearance from ground
(C) to reduce wind and snow loads
(D) to take care of extension in length during summer.

 3. Boosters are basically
(A) inductors
(B) capacitors
(C) transformers
(D) synchronous motors.

 4. Which of the following is not the distribution system normally used
(A) 3 phase-4 wire
(B) 3 phase-3 wire
(C) Single phase - 3 wire
(D) Single phase -4 wire.

 5. Skin effect results in
(A) reduced effective resistance but increased effective internal reactance of the conductor
(B) increased effective resistance but reduced effective internal reactance of. the conductor
(C) reduced effective resistance as well as effective internal reactance
(D) increased effective resistance as well as effective internal reactance.


1. The transfer function technique is considered as inadequate under which of the
following conditions ? (a) Systems having complexities and non-linearities
(b) Systems having stability problems
(c) Systems having multiple input dis¬turbances
(d) All of the above
Answer:(d) All of the above
2. In order to increase the damping of a badly underdamped system which of followincompensators may be used ?
(a) Phase-lag
(b) Phase-lead
(c) Both (a) and (b)
(d) Either (a) and (b)
Answer: (b) Phase-lead

3. Which of the following is the best method for determining the stability and transient
response ?
(a) Nyquist plot
(b) Bode plot
(c) Root locus
(d) None of the above
Answer: (c) Root locus

4. The type 2 system has at the origin.
(a) no net pole
(b) net pole
(c) simple pole
(d) two poles
Answer: (d) two poles

5. In a system low friction co-efficient facilitates
(a) increased speed of response
(b) increased velocity lag error
(c) reduced velocity lag error
(d) reduced time constant of the system
Answer: (c) reduced velocity lag error

6. From which of the following transfer function can be obtained ?
(a) Analogous table
(b) Signal flow graph
(c) Output-input ratio
(d) Standard block system
(e) None of the above
Answer: (b) Signal flow graph

7. In thermal-electrical analogy charge is considered analogous to
(a) temperature
(b) reciprocal of heat flow
(c) reciprocal of temperature
(d) heat flow
(e) none of the above
Answer: (a) temperature

8. Transfer function of a system is used to calculate which of the following ?
(a) The order of the system
(b) The time constant
(C) temperature
(d) The steady state gain
Answer: (C) temperature

9. increases the steady state accuracy.
(a) Integrator
(b) Differentiator
(c) Phase lead compensator
(d) Phase lag compensator
Answer: (a) Integrator

10. In an automatic control system which of the following elements is not used ?
(a) Error detector
(b) Oscillator
(c) Sensor
(d) Final control element
Answer: (b) Oscillator


1. A car is running at a constant speed of 50 km/h, which of the following is the feedback
element for the driver ?
(a) Clutch
(b) Eyes
(c) Needle of the speedometer
(d) Steering wheel
(e) None of the above
Ans: c

2. Which of the following is exhibited by Root locus diagrams ?
(a) The poles of the transfer function for a set of parameter values
(b) The bandwidth of the system
(c) The response of a system to a step input
(d) The frequency response of a system
(e) None of the above
Ans: a

3. With feed back _____ reduces.
(a) system stability
(6) system gain


1. An antilog amplifier has a ________ in series with the input.
B) diode
C) diode or BJT
D) resistor*

Answer:D) resistor

2. A basic ________ amplifier is formed by three op-amps and seven resistors
A) instrumentation
B) isolation
C) log *
D) Antilog

Answer:C) log 

3.A 311 IC is an example of an eight-pin DIP that can be made to function as a ________.
A) comparator
B) 555 timer