Selected Short Question On REE-101
Unit-I
Q:-1Define Bilateral & Unilateral
Elements with example.
Q:-2 Distinguish between active and passive
elements.
Q:-3 Define Ideal Voltage and Current
source.
Q:-4 If resistance of each branch is 3Ω in a
delta connected load, what would be the resistance of each branch in its star
equivalent?
Q:-5 Explain source transformation principle
in any circuit.
Q:-6 What do you mean by term Effective or RMS value.
Q:-7 Define Form Factor and peak factor.
Unit-II
Q:-1 What do you mean by term power factor?
Q:-2 What do you mean by the term Resonance?
Q:-3 What are the common conditions of both the series and parallel
resonance?
Q:-4 What do you mean by the term “Reactive Power”?
Q:-5 What do you meant by Current
Magnification factor?
Q:-6 What do you meant by Voltage
Magnification factor?
Unit-III
Q:-1 In Dynamometer type wattmeter is used
for measuring .
Q:-2 In Permanent Magnet Moving coil
instrument is used for measuring .
Q:-3 Attraction type moving iron instrument
have scale.
Q:-4 Why two-wattmeter method for power
measurement is universal one?
Q:-5 What is the major difference between
PMMC type and dynamometer type of instruments?
Q:-6 Enlist the types of moving iron
instrument.
Q:-7 What do you mean
by terms “shunt” and “ multiplier”..
Q:-8 What are the different torques required in an
indicating type instruments?
Q:-9 Why is scale of
moving iron instrument is nonlinear?
Unit-IV
Q:-1 What is magneto motive force and write
its unit.
Q:-2 Define the flux density as applied to
magnetic circuit.
Q:-3 Define the Reluctance as applied to
magnetic circuit.
Q:-4 Define the permeability as applied to
magnetic circuit.
Q:-5State the dot convention for mutually
coupled coils in terms of flux direction.
Q:-6 The full load copper-loss and iron-loss
of a transformer are 6400 W and 5000 W respectively. The above losses at half
load are .
Q:-7 What do you understand by the term
“ideal transformer”? Why the efficiency of transformer is high as compared to
other machines?
Q:-8 If in a single phase transformer core,
hysteresis and eddy current losses are 80 W and 50 W at normal voltage and
frequency then calculate losses when voltage and frequency are increased by
20%.
Q:-9
What is the condition for transformer maximum
efficiency?
Q:-10 A 400/200V single phase transformer has
primary winding resistance 1 ohm and secondary winding resistance 0.2 ohm. What
will be total resistance of transformer referred to primary side?
Unit-V
Q:-1 Name two motors used for constant speed
operation.
Q:-2 Which motor is preferred in elevators
and why?
Q:-3 Mention the applications of dc series
motor.
Q:-4 Explain the term “slip” in induction
motor.
Q:-5 Write the name of different types of
rotor of an alternator.
Q:-6 Why Dc series motor cannot be started
at no load?
Q:-7 How will you change the direction of
rotation of three phase motor?
Q:-8What are the different methods of
starting of single phase induction motor?
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