Quiz

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Year 2024

September
Week # 2 Quiz 2

Q1. The speed of a DC motor is ……..

Q2. The speed of 4 pole, 60 Hz synchronous machine will be

Q3. The applied voltage of a transformer is increased by 50% and its frequency is reduced to 50%. The maximum core flux density will

Q4. The chording angle for eliminating fifth harmonic should be:

Q5. Shunt generator running at 800 R.P.M. as the generated E.M.F. as 200 V. If the speed increases to 1000 R.P.M.(assuming other conditions to remain same). The generated E.M.F. will be

Q6. A separately excited DC generator has induced emf of 250 V and a full load terminal voltage of 240 V. If the value of armature resistance is 0.1 \(\Omega\) ,find the output of the generator.

Q7. A four pole d.c. generator is running at 1500 r.p.m. The frequency of current in armature winding is

Q8. Two synchronous generators G1and G2 are equally sharing the KVAR of the load while operating in parallel. Keeping the terminal voltage fixed in order to shift part of the KVAR load from G2 to G1

Q9. A single-phase transformer is fed with a rated supply and operates at no load. If the core of the transformer is air-core, then the waveform of steady state magnetising current drawn from the supply would be a ___________.

Q10. For a 4-pole, D.C. Lap winding with 20 slots and one conductor per layer, the number of commutator segment is