A synchronous generator is rated at 10MVA, 11kV, 0.85 p.f., 50Hz. What is the significance of 0.85 p.f.?

A)Load of p.f. more than 0.85 cannot be met
B)The prime-mover power rating is 8.5 MW 
C)It does not have any significance
D)Load of p.f. less than 0.85 cannot be met

Which one of the following equipment can open or close electrical circuits under both normal and abnormal conditions?

A)Fuse
B)Relay 
C)Circuit Breaker 
D)Isolator

A unity feed back closed loop system has open loop transfer function G(s)=K/{s(s^2+8s+25)}. At some value of K the system becomes oscillatory. What will be the values of K and frequency of oscillation?

A)150, 5 rad/sec 
B)200, 10 rad/sec 
C)200, 5 rad/sec 
D)150, 10 rad/sec

If the effect of earth is taken into account, then the capacitance of line to ground

A)Remains unaltered 
B)Increases 
C)Decreases
D)Becomes infinite

If P1 and P2 be the iron and copper losses of a transformer on full-load, then the ratio of P1 and P2, such that maximum efficiency occurs at 25% of the full-load, will be

A)1/4
B)1/64
C)1/16
D)1/2

The apparent power and active or real power are equal when the power factor (pf) is

A)0.5 leading 
B)0.5 lagging
C)zero 
D)unity

The power input to a three phase induction motor is 50kW and the corresponding stator losses are 2kW. The rotor is rotating at a slip of 3%.What will be the total rotor copper loss?

A)48 kW
B)45.46 kW
C)46.56 kW
D)1.44 kW

An SCR having equivalent capacitance of the reverse biased junction as 50 picoFarad, can be fired with a dv/dt of 200V/microsec. What will be the value of capacitive current flowing through the junction?

A)5 mA
B)1 mA 
C)20 mA 
D)10 mA

What is the effect of an integral controller on the type and order of the system?

A)Increases the type by one and increases the order by one
B)Decreases the type by one and increases the order by one
C)Decreases the type by one and decreases the order by one
D)Increases the type by one and decreases the order by one

The fault which occurs rarely in practice and is the most severe and imposes more heavy duty on the circuit breaker is

A)Line to line fault
B)Single line to ground fault 
C)Symmetrical fault 
D)Double line to ground fault

The temperature independent polarization is

A)Orientation polarization 
B)Space discharge polarization
C)Electronic polarization
D)Space charge polarization

What should be the address bus width to address 4kB memory?

A)4
B)12
C)16
D)8

If the gain of a transfer function is increased then the

A)Phase crossover frequency is decreased 
B)Gain crossover frequency is decreased 
C)Phase crossover frequency is increased 
D)Gain crossover frequency is increased

A negative feedback of β=0.002 is applied to an amplifier of gain 1000, then the percentage change in overall gain of the feedback amplifier if the internal amplifier is subjected to a gain reduction of 15% will be approximately

A)7.6% 
B)2.6%
C)5.6% 
D)9.6%

The insulators used in guy cables are

A)Stay insulators
B)Shackle insulators
C)Disc insulators
D)Pin insulators

If I(s)=(s^2+8s+8)/(s^2+4s), what will be the steady state component of i(t)?

A)1
B)2
C)4
D)8

A derivative controller

A)Improves transient stability
B)Improves steady state stability
C)Improves both the steady state and transient stability
D)Does not affect system stability 

Under force-voltage analogy, viscous friction co-efficient is analogous to

A)Reciprocal of inductance 
B)Charge 
C)Resistance
D)Reciprocal of capacitance

AC series motors are built with as few field turns as possible to reduce

A)Flux
B)Eddy current losses
C)Field reactance 
D)Speed

The displaced atom in Frenkel’s defect is called as

A)Anion 
B)Cation 
C)Hole
D)Real atom