UNIT-II

2(a) What are various Test signals? give their time domain expression and
B.E. 5th Semester (EEE)
Laplace Transform. [2]
Class Test-I (15-16)
Subject-Linear Control System (b) Derive the Expressions for rise time, peak time, and Maximum overshoot
Time- 2 hours Max. Marks 40 for the standard Second Order system in terms of damping ratio and natural
Min. Marks 14
frequency. [6]
Note: Part (a) of each unit is compulsory. Attempt any 2 parts from (b),
(c)and(d) (c) A second order control system is represented by a transfer function given
UNIT-I below: [6]
Q 1 (a) Write the analogous quantities in force current analogy. [2] θ(s) 1
(b) Determine the overall transfer function for the system whose =
T (s) J s 2+ Ds+ K
block diagram is shown in fig-1 [6]
Where, θ ,is the output and T is the input signal. If a step input of 12 Nm is
applied to the system, calculate the values of J , D , and K for the following
results: (a) M p=7 % (b) t p=1.2 sec . and (c) steady-state value of output 0.6
rad
(d) Determine the type, error coefficients and steady-state error of the system
shown in Figure below for the following inputs [6]
fig-1 8
(c) Represent the following set of equations by a signal flow
( i ) r ( t )=12 , ( ii ) r (t )=6 t , ( iii ) r ( t )=12+6 t+ t 2 .∈fig 1
2
graph and determine the overall gain relating X5 and X1 25
X2 = a X1 + f X2 ; X 3 = b X2 + e X4 ; X 4 = c X3 + h X5 ; G 1 ( s )= ∧H 1 ( s )=5 s
( s +5 ) (s+10)
X5 = d X4 + g X2 ; [6]
(d) Draw the equivalent mechanical system and analogous system
based on Force-voltage methods for the given system shown in
fig(2) [6]

UNIT-III
3(a) Write equation for standard time response of second order system
[2]
(b) Explain Routh –Hurwitz criteria for determine the stability of system. Write
its advantages and disadvantages. [5]
(c) For unity feedback system
−s
Ke
G ( s )=
fig-2 ( s +5 ) (s+10)
Find range of value of K , marginal value of K and frequency of sustained
oscillations. [5]
 (d) Determine transfer function of armature control dc servo motor. [5] 2(a) What are the different types of boiler [2]

2(b) Explain with neat sketch the working of electrostatic precipitator. Write its
advantages and disadvantages [6]

2(c) What are the factors to be considered for the selection of thermal power
plant. [6]
OR
Write short notes on
i) Economizer ii) ash handling plant iii) air preheater
iv) natural and mechanical draft system v) superheater
Time- 2 hours Max. Marks 40
Min. Marks 14 2(d) What are the different methods of pulverization of coal? Write its
advantages and disadvantages [6]
Note: Part (a) of each unit is compulsory. Attempt any 2 parts from (b),
(c)and(d)
UNIT-III
UNIT-I
3(a) Define Betz limit of wind turbine [2].
1(a) Define capacity factor [2]

3(b) Explain with neat diagram the working of WECS system. Write its
1(b) The following data were collected from the daily load curve of a power
advantages and disadvantages. [5]
system during a year.
Load Time (Duration) 3(c) Wind at standard 1 atm pressure has a velocity of 15 m/sec at a temp of 15 0
15000 KW 87 C. Given the turbine diameter 120 m operating at a speed of 60 rpm at
12000 KW & above 876 maximum efficiency. Calculate [5]
10000 KW & above 1752 i) Total power density in wind stream
ii) Maximum obtainable power density
8000 KW & above 2687
iii) Reasonable obtainable power density
6000 KW & above 4380 iv) Total power
4000 KW & above 7000 v) Maximum torque and axial thrust
2000 KW & above 8760
Construct the annual load duration curve and find the load factor of the system. 3(d) Derive the expression for available power in the wind [5].
[6]

1(c) Explain the different sources of energy. [6]

1(d) Define i)Peak load ii)Utilization factor iii)Demand factor. [6]

UNIT-II