Reference no: EM132599923

Question 1: The numbers A= 00010110 and B= 00110011 are in 2's complement form, then addition of above two numbers is
A. 01001001
B. 00111001
C. 00110111
D. 10001001

Question 2: The 8421 BCD form of decimal number 957 is A. 0011111101
B. 1111110100
C. 100101010111
D. None of the above

Question 3: Which of the following is the invalid BCD?
A. 0111 1001
B. 0101 1011
C. 0100 1000
D. 0100 1001

Question 4:  The binary equivalent of gray code 00010 is A. 00010
B. 00011
C. 0001
D. 11101

Question 5: Gray code of 1111011 is A. 1000110
B. 1111110
C. 1000010
D. 1000100

Question 6: Root locus of 2s(s+4)+k(s+8) is a circle. The co-ordinates of the centre of the circle?
A. (-5,0)
B. (-6,0)
C. (-7,0)

D. (-4,0)

Question 7: Breakaway point in the root loci plot for the loop transfer function G(s)H(s) = k/((s+1)(s+2)²) is

A. -1.33
B. -1.00
C. -1.50

D. -.75

Question 8: Consider the following statements with the reference to the root loci of the characteristic equation of unity feedback control system with an open loop transfer function of G(s) = k(s+1)(s+3)/s(s+2)(s+4) -

1. Each locus starts at an open loop pole and ends either at an open loop zero or infinity
2. Each locus starts at an open loop pole or infinity and ends at an open loop zero
3. There are three separate root loci
4. There are five separate root loci Which of these statements are correct?
A. 2 and 3
B. 2 and 4

C. 1 and 3
D. 1 and 4

Question 9: The loop transfer function of a system is given by G(s)H(s) = k(s+1)(s+18)⁴/(s+4)(s+33)³
The number of loci terminating at infinity is
A. 1
B. 2
C. 3
D. 4

Question 10:

The low frequency and high frequency asymptotes of bode magnitude plot are respectively -20deb/decade and -80db/decade. What is the type of system?
A. 0
B. 1
C. 2
D. 3
Question 11: Minimum phase unity feedback system has a bode plot with constant slope of -18db/octave for all frequency. What is the value of the maximum phase margin for the system?
A. 0
B. 90
C. 180

D. 270

Question 12: At which frequency does the Bode magnitude plot for the function k/s³ have Gain crossover frequency?
A. k
B. 2√k
C. 3√k
D. 4√k

Question 13: Characteristic equation of a system having unity feedback is (s+1)(s-2)+ k(s-3)(s+4). The system is then which of the following?
A. Minimum Phase system
B. Non- minimum phase system
C. All pass system
D. None of the above