Two transformers are connected in parallel. These transformers do not have equal percentage impedance. This is likely to result in

A short-circuiting of the secondaries
B power factor of one of the transformers is leading while that of the other lagging
C transformers having higher copper losses will have negligible core losses
D loading of the transformers not in proportion to their kVA ratings

Correct Answer: loading of the transformers not in proportion to their kVA ratings

Bissoy MCQ
#Electrical Engineering #Transformers

Related Questions

Why transformers connected in parallel should have same voltage ratio?
A To avoid full load circulating current
B To avoid no-load circulating current
C To avoid other losses
D To avoid all type of currents
What will happen if the transformers working in parallel are not connected with regard to polarity?
A The power factor of the two trans-formers will be different from the power factor of common load
B Incorrect polarity will result in dead short circuit
C The transformers will not share load in proportion to their kVA ratings
D Cannot be determined
If the percentage impedances of the two transformers working in parallel are different, then
A transformers will be overheated
B power factors of both the transformers will be same
C parallel operation will be not possible
D parallel operation will still be possible, but the power factors at which the two transformers operate will be different from the power factor of the common load
সিরিজে সংযুক্ত একটি এ্যামিটার এবং একটি অজানা রোধ দুটি একই রকম 1.5 V ব্যাটারীর দুই প্রান্তে সংযুক্ত আছে। যখন ব্যাটারী দুটি সিরিজে সংযুক্ত থাকে তখন এ্যামিটার। amp রিডিং প্রদর্শন করে। আবার ব্যাটারী দুটি সমান্তরালে সংযুক্ত করলে 0.6 amp রিডিং প্রদর্শন করে। ব্যাটারীর আভ্যন্তরিন রোধ কত ? (An ammeter and an unknown resistance are connected in series across two identical batteries of each 1.5 V. The ammeter shows current I amp and 0.6 amp when the batteries are connected in series and parallel, respectively. What is the internal resistance of the battery?)
A 13Ω
B 12Ω
C 1Ω
D 0.1Ω
E 23Ω
The two parallel and coplanar shafts are connected by gears having teeth parallel to the axis of the shaft. This arrangement is known as
A Spur gearing
B Helical gearing
C Bevel gearing
D Spiral gearing
In order to get maximum power transfer from a capacitive source, the load must have an impedance that is the complex conjugate of the source impedance.
A True
B False
What will be the reflection co-efficient of the wave of load connected to transmission line if surge impedance of the line is equal to load ?
A Zero
B Unity
C Infinity
D None of the above
Two transformers operating in parallel will share the load depending upon their
A leakage reactance
B per unit impedance
C efficiencies
D ratings
For the parallel operation of single phase transformers it is necessary that they should have
A same efficiency
B same polarity
C same kVA rating
D same number of turns on the secondary side.
Think a number and then double the number. Then add 8 and multiply the result by 6. Now divide the result by 10 the subtract the number you first thought out. what is the final result?
A 4
B 6
C 10
D 14

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