Prepare for the RME Exam
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#1. The mechanical power developed by the DC motor is maximum when ________.
#2. The speed of DC series motor at no load is _____ .
#3. Power transformers are designed to have maximum efficiency at __________.
#4. In a given machine. How may the no? Of parallel paths be increased in the armature of lop connected.
#5. Which of the following motors has high starting torque?
#6. A magnet is being heated to a temperature of 460°. What do you think will happen?
#7. The resistance of low voltage side of a transformer __________.
#8. In a squirrel cage induction motor, which component is NOT a part of the motor?
#9. In a DC circuit, the ratio of watts to voltamperes is always _________.
#10. On a delta three-phase four-wire secondary, how many hot wires may use the common neutral?
#11. The dummy coil in the DC machines is used to ___________.
#12. In a small dc machine, armature slots are sometimes not made axial but skewed. Though skewing makes winding a little more difficult, yet it result in_______________________.
#13. Transformers are rated in ___________.
#14. Which of the following is a correct statement about eddy currents?
#15. The basic property of the transformer is that it changes the voltage level of an a.c. signal _______.
#16. How many contactor is needed to reverse the rotation of a three phase motor _____ .
#17. A hot smoky motor is a good indication of:
#18. What is standard instrument to measure the speed of a motor?
#19. In the design of Power Supply, transformer should not be place near the component because of vibration/humming due to _______.
#20. Which of the statement given below is true about autotransformer?
#21. A part of a generator that links the generator to the prime mover __________.
#22. What should be the possible no. of poles to obtain the highest operating speed?
#23. With a 3Ø delta-wye connected transformer 480 V primary, 208/120 V secondary, the secondary line current is ________.
#24. What is the common method of cooling transformer?
#25. What type of core is used for a high frequency transformer?
#26. If the field of a synchronous motor is under excited the Power factor will be _____ .
#27. For the equal output the total current is more in ______ .
#28. Preferably, the resistance between the primary and the secondary of a transformer should be ___________.
#29. The function of commutator in DC generator is _____ .
#30. The standard method of controlling the output voltage of a 440 V, 60 Hz AC generator is accomplished by adjusting the ____________.
#31. A generator has a commercial efficiency of 95% and a mechanical efficiency of 97%. Find the electrical efficiency.
#32. What is the turns ratio on a three-phase, four wire 480/240/120 volt transformer?
#33. Transformer core uses small frequency because is laminated _________.
#34. The transformer oil used in a transformer provides ____________.
#35. Electric power is transformed from one coil to the other coil in a transformer ______.
#36. Electric motors are rated in ________.
#37. A 25-hp engine drives a DC generator, if the generator has an efficiency of 84%, how much does it deliver?
#38. In any transformer the voltage per turn in primary and secondary remains ___________.
#39. _______________ the slot teeth will make the DC generator quieter in operation.
#40. In practice the rotation of electric motor referred to its back is ______ .
#41. Which transformer has only one winding?
#42. What is common in the two windings of a transformer?
#43. Which of the following motor is used in the Electric train?
#44. The stray losses in the transformer will be reduces if _____ .
#45. A 25 kVA, 2400/240 volt transformer has a primary current of 10 A. What is the secondary current?
#46. Which among the following types of motor with same power rating having the same voltage level is the heaviest?
#47. What is the equation for the DC generator?
#48. A transformer is more efficiently utilized when the load has a ______ power factor.
#49. A generator may lost residual magnetism because of excessive ______.
#50. The size of a transformer core will depend on _____________.
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