Control Systems-Feedback Principle [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 1 - 3 of 3

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Question 1

Appeared in Year: 2018

Question MCQ▾

A Travelling Wave Tube Amplifier (TWTA) has the following properties:

1) It provides an octave bandwidth.

2) It provides an approximate gain of 40dB and more.

3) It has a low noise figure.

4) It has a very high noise figure.

Out of the above statements following is correct: (July)

Choices

Choice (4)Response

a.

1) and 4) only

b.

1) and 2) only

c.

1) , 2) and 4) only

d.

1) and 2) and 3) only

Edit

Passage

Sensitivity considerations often are important in the design of Control Systems. Because all physical elements have properties that change with environment and age, we cannot always consider the parameters of the Control System to be completely stationary over the entire operating life of system. For instance, the winding resistance of an electric motor changes as the temperature of the motor rises during the operation. Control System with electric components may not operate normally when first turned on because of the still-changing system during warm-up. This phenomenon is sometimes called “morning sickness” . Most duplicating machines have a warm-up period during which time operation is blocked out when first turned on.

(July)

Question 2 (1 of 1 Based on Passage)

Appeared in Year: 2018

Question MCQ▾

The open loop transfer function of a Unity feedback Control System is given by the steady state error will be: (July)

Choices

Choice (4)Response

a.

rad

b.

rad

c.

rad

d.

rad

Edit

Question 3

Appeared in Year: 2015

Question MCQ▾

Negative feedback in a closed-loop control system DOES NOT

Choices

Choice (4)Response

a.

Reduce bandwidth

b.

Improve disturbance rejection

c.

Reduce the overall gain

d.

Reduce sensitivity to parameter variation

Edit