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Bifpcl 15

1. The document contains 12 questions related to electrical engineering concepts for an assistant engineer recruitment test. The questions cover topics like circuit analysis using mesh currents, power transfer in circuits, operational amplifier circuits, amplifier specifications, DC machine characteristics, induction motor losses, transfer functions, steam turbine plant components, coal properties, power factor correction, synchronous motor protection, and overcurrent relay operation. 2. The questions test knowledge of concepts like circuit analysis techniques, maximum power transfer theorem, superposition theorem, component ratings, generator and motor operation, electrical-mechanical energy conversion, system modeling, steam plant systems, fuel types and quality, power measurements, excitation protection, and relay characteristics. 3. The document is a recruitment test to

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102 views3 pages

Bifpcl 15

1. The document contains 12 questions related to electrical engineering concepts for an assistant engineer recruitment test. The questions cover topics like circuit analysis using mesh currents, power transfer in circuits, operational amplifier circuits, amplifier specifications, DC machine characteristics, induction motor losses, transfer functions, steam turbine plant components, coal properties, power factor correction, synchronous motor protection, and overcurrent relay operation. 2. The questions test knowledge of concepts like circuit analysis techniques, maximum power transfer theorem, superposition theorem, component ratings, generator and motor operation, electrical-mechanical energy conversion, system modeling, steam plant systems, fuel types and quality, power measurements, excitation protection, and relay characteristics. 3. The document is a recruitment test to

Uploaded by

A One Shoppers
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Recruitment Test of BIFPCL-2015

Post: Assistant Engineer (Electrical)


1. Find out the loop currents using mesh analysis.
Assume R=10Ω.

+
60 V − 2A 1A

1A

2. Find the value of RL for maximum power transfer


and the maximum power transferred.

3Ω 20 V

10Ω 4A 10Ω RL

3. Using superposition theorem, Determine the Vo of the Op-Amp

70 kΩ
5 kΩ
−
Vo
25 kΩ +
Vi1
50 kΩ
Vi2
4. Find the proper current, voltage & power rating of the
amplifier shown in figure.

VCC = 24 V

8Ω
Vo

Vin

5. A 220 V shunt connected dc machine has an armature


resistance of 0.5 Ω and shunt field resistance of 110 Ω .
If the full load current is 20 A, Find the induced e.m.f
when the machine works as generator and motor.

6. The rotor cu-loss of a 3-phase induction motor is 300 W. for a


slip of 4.5%, calculate the electrical power converted to
mechanical power.

7. Determine the equivalent transfer function C(s)/R(s) of system.

H1(s)

R(s) G1(s) G1(s) C(s)

8. What is the difference between feed water and cooling water


of a steam turbine plant?
9. What is the main components of coal? Name some types of
coal? How fuel quality can be recognized?

10. A voltmeter reading 240 volts, ammeter reading 10 A,


wattmeter reading 1200 W, (a) find power factor,
(b) comment on the type of load, (c) what is reactive power
that should be compensated if the pf is unity, (d) what will be
the size of capacitor o achieve the target.

11. How loss of excitation protection of synchronous motor


provided?

12. Determine the time of a 5 amp, 3 sec overcurrent relay having


a current setting of 125% and a time setting multiplier of 0.6
connected to supply circuit through a 400/5 current
transformer when the circuit carries a fault current of 4000 A.
Use the curve shown in the figure.

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