Control Systems Mid - II, April - 2012
1.As the value of gain K increases the system stability
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increases
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reduces
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depends
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none
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Answer: B
2.The more positive phase margin, ______ is the stability of the system.
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more
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less
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depends
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doesnt depend
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Answer: A
3.Using bode plot, the following can be determined
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cutoff frequency
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bandwidth
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gain margin
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all the above
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Answer: D
4.The poles of 1 G(s)H(s) are
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poles of G(s)H(s)
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open loop poles
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both
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none
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Answer: C
5.The lag compensator is basically a filter
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high pass
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band pass
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band reject
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low pass
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Answer: D
6.The c.s given by G(s)H(s)=10/(s 5)(s^2 2s 2) is
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unstable
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stable
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marginally stable
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depends
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Answer: B
7.The system in which output is not only dependent on input but also on in initial conditions is called system
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static
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dynamic
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zero memory
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none
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Answer: B
8.In a state space matrix the matrix D is also called as matrix
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system
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evolution
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control
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direct transmisssion
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Answer: D
9.S-1:The state model of a system is not unique S-2:transfer function of a state model is unique
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S-1 and S-2 are true
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S-1 true and S-2 false
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S-1 false and S-2 false
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S-1 false and S-2 true
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Answer: A
10.The zero input response of system is also called as response.
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free
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natural
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unforced
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all the above
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Answer: D
11.The slope of resultant magnitude curve near cutoff frequency is called ------------------ rate.
Answer: cut off
12.The amount of additional phase angle lag which can be introduced in system till system reaches on verge of instability is called -----------------------.
Answer: phase margin
13.The unity feedback system G(s)=80/s(s 2)(s 20) the no. of simple poles are ---------------.
Answer: 2
14.The zeros of 1 G(s)H(s) are ----------------- poles of the system.
Answer: closed loop
15.According to mapping theorem the encirclement of origin N= ------------------------.
Answer: Z-P
16.The alteration of system using additional suitable devices is called -------------------- of a control system.
Answer: compensation
17.The lag compensator allow high gain at ---------------- frequency.
Answer: low
18.The characteristics equation of a state space model is given by ------------------.
Answer: SI-A=0
19.The method of obtaining state space model using canonical variables is also called --------------- programming.
Answer: parallel
20.The roots of characteristic equation are called ---------------- values of matrix.
Answer: eigen