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Test: State Variables And Linear Discrete : Time Systems - Electrical Engineering (EE) MCQ


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10 Questions MCQ Test - Test: State Variables And Linear Discrete : Time Systems

Test: State Variables And Linear Discrete : Time Systems for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Test: State Variables And Linear Discrete : Time Systems questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: State Variables And Linear Discrete : Time Systems MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: State Variables And Linear Discrete : Time Systems below.
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Test: State Variables And Linear Discrete : Time Systems - Question 1

Which of the following can be used as a tacho generator in control systems?

Detailed Solution for Test: State Variables And Linear Discrete : Time Systems - Question 1

Answer: c
Explanation: Tacho-generator in the control system is used to manage the speed and convert the speed into measurable terms and AC servomotor can be used as Tacho generator in control systems.

Test: State Variables And Linear Discrete : Time Systems - Question 2

Consider the function F (s)= 5/s(s2+3s+2), the initial value of f(t) is: 

Detailed Solution for Test: State Variables And Linear Discrete : Time Systems - Question 2

Answer: d
Explanation: For initial value theorem in which time is at t =0 and for the frequency which is the inverse of time, the value of s is replaced with infinity and hence the value obtained is 0.

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Test: State Variables And Linear Discrete : Time Systems - Question 3

An electric motor is developing 10KW at a speed of 900rpm. The torque available at the shaft is:

Detailed Solution for Test: State Variables And Linear Discrete : Time Systems - Question 3

Answer: a
Explanation: The formula of the Torque =9.544*Power/speed in rpm and unit is N-m and by this the value of the torque can be calculated.

Test: State Variables And Linear Discrete : Time Systems - Question 4

Assertion (A): Many of the linear control system transfer function do not have poles or zeroes in the right half s-plane.
Reason (R): These are called minimum phase transfer function.

Detailed Solution for Test: State Variables And Linear Discrete : Time Systems - Question 4

Answer: a
Explanation: For minimum phase systems the poles and zeroes must be on the left side of the s-plane and for the systems which have zeroes on the right half of the s plane are called non-minimum phase systems.

Test: State Variables And Linear Discrete : Time Systems - Question 5

The tacho meter has sensitivity of 5V/1000rpm. The gain constant of the tacho meter is:

Detailed Solution for Test: State Variables And Linear Discrete : Time Systems - Question 5

Answer: b
Explanation: Gain constant = 5*60/2p*1000(V/rad/sec)
0.048 V/rad/sec.

Test: State Variables And Linear Discrete : Time Systems - Question 6

The closed loop transfer function of a unity negative feedback system is 100/(s2+8s+100). Its open loop transfer function is: 

Detailed Solution for Test: State Variables And Linear Discrete : Time Systems - Question 6

Answer: d
Explanation: For unity feedback system the closed loop transfer function is: G/1+GH and the open loop transfer function can be calculated by balancing the value of G.

Test: State Variables And Linear Discrete : Time Systems - Question 7

The impulse response of a linear LTI system is given as g (t) = e(-t)The transfer function of the system is equal to:

Detailed Solution for Test: State Variables And Linear Discrete : Time Systems - Question 7

Answer: c
Explanation: Impulse response is just the Laplace transform of the transfer function and the response is just the Laplace transform of the forward path block.

Test: State Variables And Linear Discrete : Time Systems - Question 8

In a closed loop for which the output is the speed of the motor, the output rate control can be used to:

Detailed Solution for Test: State Variables And Linear Discrete : Time Systems - Question 8

Answer: a
Explanation: For motor to be the closed loop system the output of the system is the speed of the motor and output rate can be to limit the speed of the motor.

Test: State Variables And Linear Discrete : Time Systems - Question 9

In servo-system, the device used for derivative feedback is known as:

Detailed Solution for Test: State Variables And Linear Discrete : Time Systems - Question 9

Answer: d
Explanation: Tacho generator provides the derivative feedback when used in a servo system and it controls the speed of the servo-system by providing the value of the speed as feedback.

Test: State Variables And Linear Discrete : Time Systems - Question 10

The transfer function of any stable system which has no zeros or poles in the right half of the s-plane is said to be:

Detailed Solution for Test: State Variables And Linear Discrete : Time Systems - Question 10

Answer: a
Explanation: For a minimum phase system all the poles and zeroes of a transfer function must lie on the left of the imaginary axis and these type of the systems if causal are always stable.

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