1. A system has 14 poles and 2 zeros in its open-loop transfer function. The slope of its highest frequency asymptote in its magnitude plot is

- -40 dB/dec
- -240 dB/dec
- +40 dB/dec
- +240 dB/dec

2. For a type-I system, the intersection of the initial slope of the bode plot with 0 dB axis gives

- steady-state error
- error constant
- phase margin
- cross-over frequency

3. Gain margin is the factor by which the system gain can be increased to drive it to

- critically damped state
- the verge of instability
- oscillation
- stability

4. In the bode plot of a unity feedback control system, the value of phase of G(jω) at the gain cross-over frequency is -125°. The phase margin of the system is

- –125°
- -55°
- 55°
- 125°

5. What will be the gain margin in dB of a system having the following open-loop transfer function?

$G(s)H(s)=\frac{2}{s(s+1)}$

- ∞
- 0.5
- 2
- 0