(B) Fuel cost
102. The output of a standard second order system for a
unit step input is given as
The transfer function of this system is
given as
103. Thyristor can be protected from over voltages by
using
104. The positive plates of nickel iron cell is made up
of
105. Why resistor is used in snubber circuit?
106. The number of entries in the truth tables of a 3
input NAND gate is
107. Which logic family provides minimum power
dissipation
108. Which theorem states that the total average power
of a periodic signal is equal to the sum of average powers of the individual
Fourier coefficients?
109. What is power angle equation of synchronous
machines?
110. Laplace Transform exists when the function is
111. What is/are the crucial purposes of using the
Fourier Transform while analyzing any elementary signals at different
frequencies?
112. Voltage-divider bias provides :
113. With a 12 V supply, a silicon diode, and
a 370-ohm resistor in series, what voltage will be
dropped across the diode?
114. Which type/s of discrete-time system do/does not
exhibit the necessity of any feedback?
115. According to Nyquist stability criterion, where
should be the position of all zeros of q(s) corresponding to s-plane?
116. The force between two charges is 120 N. If the distance between the charges is doubled, the force will be
117. If poles are added to the system, where will the
system tend to shift the root locus?
118. If a type 1 system is subjected to
parabolic input, what will be the value of steady state error?
119. Which system exhibits the initiation of corrective
action only after the output gets affected?
120. Which statements represent the properties of a
tree according to the network graph theory?
121. How many number of trees are possible for a
network possessing 'n' nodes?
122. Which element of graph theory specifies a subgraph
of a graph by allowing the incidence of exactly two branches at each node?
123. The no-load current drawn by a transformer is
usually what percentage of the full load current.
124. The efficiency of a transformer will be maximum
when
125. The maximum efficiency of a distribution
transformer is at
126. Which of the following protects a cable against
mechanical injury?
127. Dielectric strength of rubber is
128. If the capacitance of a single phase motor is
short-circuited the motor will
129. In a shaded-pole single phase motor, the revolving
field is produced by the use of
130. The relative permittivity of rubber is between
131. KCL works on the principle of which of the
following
132. Materials exhibiting zero value of resistivity are
known as
133. Megger is a portable instrument. It is used for
the measurement of
134. Compare the total copper cross sections in terms
of current-carrying capacity for a single-phase and a three-phase 120 V system with effective load resistance of 15
ohm.
135. What causes the piezoelectric effect?
136. The speech signal is obtained after
137. The Nyquist theorem for sampling
138. If the instrument is to have a wide range, the
instrument should have
139. DTFT is the representation of
140.
(A) 1
141. The interval in which the Lagrange’s theorem is
applicable for the function f(x) = 1/x is
142. If f(x) = | x |, then for interval [–1, 1],
f(x)
143. What is the derivative of f(x) = | x | at x = 0
144. The maxima and minima of the function f(x) = 2 ×
3 – 15 × 2 + 36x + 10 occur respectively at
145. Area bounded by the parabola 2y
= x2 and the line x = y – 4
is equal to
146. Sum of the perimeters of a circle and a square is 1. If sum of the area is least, then side of the square is
147. 8085 microprocessor has how many pins
148. Lead network is used to
149. The phase of lead compensator of the system G(s) =
(s + a) / (s + b) is maximum at 
(D) 
150. The dc gain of a system represented by the
transfer function 12/(s + 1) (s + 3) is
151. What is the order of a system
(A) 1
152. A negative feedback closed loop system is supplied
to an input of 5 volt. The system has a forward gain of 1
and a feedback gain of 1. What is the output voltage (in Volts)?
153. A system of constant voltage and constant
frequency is called system.
154. What quantity of charge must be delivered by a
battery with a Potential Difference of 110 V to do 660 J of Work?
155. A cascade of three linear time invariant systems
is casual and unstable. From this we conclude that
(A) each system in the
cascade is individually caused and unstable.
156. Which triggering is the most reliable?
157. The latching current of SCR is 20
mA. Its holding current will be
158. When a neutral point of 3 - z system is directly connected to earth then it has what type of grounding?
159. Which of the following material is not used as
fuse element?
160. In a certain three-wire Y-connected generator, the
phase voltages are 2 KV. The magnitudes of the line voltages are
161. Which of the following theorem can be applied to
any network, which is linear (or) nonlinear active (or) passive, time variant
(or) time in variant?
162. The list of coded instructions is called.
163. A 10 V battery with an internal resistance of 1 ohm is connected across a non-linear load whose V. I characteristic are 71 = V2
+ 2V The current delivered by the battery is
(D) 7 A
164. Mass in force-voltage analogy is analogous to
165. Steady state stability limit is
166. If the gain of the open loop system is doubled,
the gain margin.
167. An ideal diode is one which behaves as a perfect when forward biased
168. In an SCR circuit, the supply voltage is
generally that of breakover voltage
169. In AC supply, an SCR can exercise control over
170. In an LC transistor oscillator, the active device
is
171. Hartley oscillator is commonly used in .
172. Slope of asymptote in Bode plot of 2nd
order system is per octave.
173. The graph of an electrical network has N nodes and
B branches. The number of links L with respect to the choice of a tree, is
given by
174. Error constants of a system are measure of
(A) Doping
176. Relative permittivity can be measured by bridge.
177. Which of the following is not a transmission
medium?
178. 2nd order low pass filter has cut off frequency as compared to 1st
order low pass filter
(A) step
180. What is the open loop DC gain of a unity feedback
control system having closed loop transfer function is ?
(A) 4/13
181. Adding a pole to a system transfer function in
terms of compensator represents a
compensator?
(A) Lead
182. The open loop transfer function of a unity
feedback control system is given by G(s) = k/s(s+1). If gain k is increased to infinity, then damping ratio will tend to become.
183. The system function
The system is initially at rest. If the excitation i(t) is a unit step, which
of the following is the initial value?
(A) 0
184. A system is stable for
185. Time constant is defined as the time taken by the
response of the system to reach ?
186. If the magnitude of G(jw)H(jw) at phase crossover
frequency is 0.5. Find the gain margin of the given system?
187. A square matrix is called singular if its
188. The internal resistance of a dry cell is of the
order of
189. Galvanizing is the coating of
190. For a ring counter, the number of output states
are always equal to number of
191. Convert the binary number (1111000011110000) to hexadecimal number.
192. 2’s Complement of 10101011 is
193. Which of the quantity consists of unit as Pascal?
194. A galvanometer with a full scale current of 10
mA has a resistance of 1000 W. The multiplying power (the ratio of measured
current to galvanometer current) of 100 W shunt with this
galvanometer is
195. The speed of a DC shunt-motor depends upon the
196. A practical capacitor is specified by a loss angle
which is the
197. The speed of an Induction Machine can be best
controlled by varying the
198. In a tube light the starter contains a capacitor
in parallel to
199. The displacement current flows in
200. Skin effect is an
201. Which system cannot be represented by a transfer
function? 
202. The step response of a system with transfer
function
attains more than 98% of its final value in time t equal to
203. The loop transfer function in a feedback control
system is, 
The steady state error
due to step input is,
204. The Z transform of
(A) 1/(1 – 3z–1)
205. If the closed-loop transfer function of a control
system is given below. The system is
(A) An Unstable System.
206. A Signal has frequency components from 300 Hz to 1.8 KHz. The minimum possible rate at which the
signal has to be sampled is more than ______.
207. The signal u(t – 1) is
208. Magnetic Hysteresis can be used in
209. The power loss in a resistance when charging an
inductor to current I from a DC source is
210. A signal generator should have
211. The induction heaters used in kitchen has
212. In Digital Circuits the major heat is generated at
the
213. The pressure coil of the wattmeter has
214. Generally the noise is characterized by its
215. A network has 7
nodes and 5 independent loops. The number of branches in
network is
216. What does a hall effect sensor sense?
217. Twelve 1 Ohm resistances are used as
edges to form a cube. The resistance between two diagonally opposite corners of
the cube is
219. The dB is generally calculated for the
220. In a
typical opamp the common mode rejection ratio should be
221. One Tesla is equivalent to
222. In steady-state single phase transformers the
hysteresis effect induces
223. The sampling error in an A-D converter can be
reduced by
224. The race around condition in flip-flops can be
removed by
(A) carry more flux
(A) Asymmetric
227. The input to a linear system is a purely
sinusoidal signal.
228. The following circuit can act as a memory
229. The plant having a stable under-damped transfer
function as
has
230. Impedance Matching is necessary to
231. A sinusoidal signal of frequency 1
kHz should be measured by a
232. An inverting operational amplifier is fed from a
signal source through resistance Rl. The feedback resistance is RF. If the
opamp acts as sign changer then
233. What is the result of frequency instability?
234. The minimum number of wattmeter’s required to
measure three phase power
235. Form factor is
236. Quality factor is
237. Short-circuit voltage and open-circuit current in
a network is
238. Current flowing in the circuit ______ the supply
voltage in a Series RL circuit.
239. The base criteria for nodal and loop analysis are
______ and ______, respectively.
240. In an AC circuit, the reactance offered by the
inductor and capacitor will be:
241. The expression for power factor in a series RLC
circuit is given as :
242. The effective impedance of a series RLC circuit under
resonance is equal to ______.
243. Inductor and capacitor does not allow sudden
change in ______ and ______, respectively.
244. Schmitt trigger acts as
245. OP-AMP is having
246. UJT acts as
247. Universal logic gates are
248. In a BJT, the relation between current gains is
given by
249. The expression of settling time in second order
system 
250. The following stability assessment tool is carried
out for sinusoidal input signals
251. In the first column of routh array, number of sign
changes indicate
252. For verifying the closed loop stability, which
technique is used
253. The mathematical relation for converting
state-space to transfer function
254. A linear system satisfies:
255. For variable frequency applications, ______
converter is used
256. Which of the power electronic device conducts for
minimum gate current:
257. A voltage source in series with inductor can be
treated as:
258. In averaged model of VSC, peak value of line to
neutral voltage is
259. Voltage Source Converter refers to
260. PWM pulse can be generated by comparing
261. Statement 1: Diode rectifier is
controllable
262. The ratio of output voltage and input voltage for
a step down chopper is
263. For a step-up chopper, output voltage is equal to
input voltage when
264. Equal area criterion is applicable only for
265. Which of Dead weight gauge is used for the
measurement of pressure of about
266. Which of the following methods converge for less
iterations
267. For long transmission line, the relay preferred
will be:
268. Active and reactive power flows in a transmission
line are governed by ______ and ______, respectively.
269. In a short transmission line, ______ is neglected.
270. Which of the following relation holds good for
transmission parameters:
271. The concept of locus diagram is applied to:
272. Short transmission line is governed by
273. Fast Decoupled Load Flow method is the
modification of:
274. The units of inertia constant are:
275. Inertia constant is the ratio of:
276. Direct and quadrature axes powers in a synchronous
machine refers to:
277. In a power system, active power is influenced with
278. In the context of India, the power plant meeting
based load is:
279. Synchronous condenser is:
280. STATCOM generates
281. A bus or node in a power system refers to:
282. Which of these components are negligible in a
balanced three phase system.
283. The preferred transmission system above breakeven
distance:
284. Voltage regulation of transformer is negative in
the case of:
285. The number of parallel paths for lap and wave
windings in a DC machine are:
286. The EMF equation in a DC machine is proportional
to:
287. Induction motor acts as generator at ______ the
synchronous speed.
288. Which of the following machine is best suited for
constant speed application.
289. The nomenclature of the following 3-φ transformer is:
Balanced 3-phase
supply
290. In a DC series machine, torque is proportional to:
291. In synchronous machines, damper winding is placed
to
292. In case of a 1-φ induction motor, the
phase shift between main and auxiliary windings will be:
293. The commutation in a DC machine involves
294. Which of the following tests can be conducted to
determine iron and copper losses of a transformer simultaneously:
295. Statement 1: Unequal power ratings of transformers cannot be considered for parallel operation.
Statement 2: The X/R ratios of transformer windings need to be
same for parallel operation.
296. One of the following experiments is carried out at
no-load.
297. The field in the air gap of an induction motor
rotates at
298. The armature current of a DC shunt generator is:
299. Rotor resistance can be varied in
300. From no-load and blocked rotor tests of an
induction motor, which of the following can be determined:
149. The phase of lead compensator of the system G(s) =
(s + a) / (s + b) is maximum at
(A)
(B) a/b
(C) ab
(D)
(A) each system in the cascade is individually caused and unstable.
163. A 10 V battery with an internal resistance of 1 ohm is connected across a non-linear load whose V. I characteristic are 71 = V2
+ 2V The current delivered by the battery is
(A) 2.5 A
(B) 5 A
(C) 6 A
(D) 7 A
(A) Lead
No comments:
Post a Comment