1.what will happen if reactive power is less than minimum value?
2.velocity error is which response?
3.IGBT is having both the properties
a.BJT and MOSFET
4.Field Effect Transistor acts as a ________?
5. SCR is Combination of
a. pn and pn junction b.pnp and pn junction c. pnp and npn junction d. pnp and np junction
6.why we use dc series motor in urban/suburban traction system ?
a. high starting torque b.with stand fluctuated loads c.high efficiency d. none of the above
7.accelaration 6km/hr in 30 secs free running 20 mins deceleration 6km/hr 30 secs
is for which traction system ?
8.Alternator is connected to bus bur prime mover is short circuited alternator acts as a
9.which motor having good power factor
a. capacitor startor b.capcitor run c. capacitor run and start d.shaded pole motor
10. what is the disadvantage of shaded pole motors
11.Common Emitter Transistor is a__________
12.If character equation having different signs the system is
13.when we apply Regenarative brakes
14.In CRO X-plate input is square wave Y-plate input is traingle wave what is the output
15. what is the use of blanker block in CRO
16.In Anderson Bridge for measuring the quantities by using unknown and known quantities of
a.Resistance b.Inductor c.Resistance and Inductor d.R L C
17.For Measurement of Capacitance which bridge we use ?
18.Some times we use Over Rated AC motors in some applications
a. high efficiency ,low pf b. high efficiency ,high pf c.low efficiency ,low pf d.low and low pf and eff
19.Over Current relay used in
a.T/M lines b.Distribution lines c.Alternators D.Medium T/m Lines
20.LVDT is a ?
21.Ia0=1.8,Ia1=2.0,Ia2=1.5 amps what is the fault if values of currents is given
a. LG fault b.LLG fault C.LLfault d. 3phase fault
22.In Differential Compound Motor Series ckt is short circuited what it results
a.Speed Decrease b.Speed Increase c. remains Same d. None of the above
23.In full -load copper and Iron losses are given what will happened copper and iron losses if load half-full load
24.For a constant flux T/F operating at 1000 rpm and 100 volts 50 Hz is speed is changed to New value 1200 rpm what is the new value of Voltage
25.Chopper Ton =100 and Toff=150 for protection of over voltage and over current
26. what is the phase shift of Common Emitter Transistor
27. In Step and Ramp responses what is the steady state errors
28. what is the condition of state space theory in both time and frequency domains
29.Half,semi,Full,Dual Convertor voltage values match the fallowing
30.what is the use of reheater in Thermal Power Plant
31. where is the surge tank placed in Hydro power plants.
32. which plant we used as peck load power plant
a.hydro b.nuclear c. thermal d. Diesel
33.In Butt Welding what will happen if Subject thickness is incresed
a. voltage and current increased b. v and i Decreased C. V constant I increased D. V and I Constant
34.3 phase induction squirrel cage ,3phase Slip Ring,Single Phase IM,Synchronous there starting methods
35.In DC shunt motor Series Resistance is short Circuited what will happen
36.How to we reduce magnetic hum in T/Fs
37.Treedoys are used for ?
38.A 400/220 Volts T/F P.U impdence is reffered to HV side is 0.1 P.u if we refer to LV what is impedence value
39.What is advantage the advantage of 3 phase over single phase
40.Gate Realizations
41.what is the max regulation of IMotors
42.What is The Efficiency of modern thermal power plants
43.If SurgeImpdence is terminated what will happen in T/M lines
44.what will happen if receiving end is open circuited
45.If system having 3 Asymptotes how many poles and zeros that system have
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