2 MVA
5 MVA
7.5 MVA
10 MVA
Answer is Right!
Answer is Wrong!
Electrical machine design
2. In a Weston frequency meter, the magnetic axes of the two fixed coils are
Parallel
Perpendicular
Inclined at 60°
Inclined at 15°
Answer is Right!
Answer is Wrong!
Detailed SolutionIn a Weston frequency meter, the magnetic axes of the two fixed coils are
3. The heat dissipating capability of transformers of ratings higher than 30 kVA in increased by providing which of the following?
Corrugations
Fins
Tubes
All of the above
Answer is Right!
Answer is Wrong!
4. Operating torques in analogue instruments are
deflecting and control
deflecting and damping
deflecting, control and damping
vibration and balancing
Answer is Right!
Answer is Wrong!
Detailed SolutionOperating torques in analogue instruments are
5. The flash point of transformer oil should be higher than
40°C
60°C
80°C
104°C
Answer is Right!
Answer is Wrong!
Detailed SolutionThe flash point of transformer oil should be higher than
6. Commonly used instruments in power system measurement are
induction
moving coil or iron
rectifier
electrostatic
Answer is Right!
Answer is Wrong!
Detailed SolutionCommonly used instruments in power system measurement are
7. With direct water cooling it is possible to have ratings of about
200 MW
300 MW
400 MW
600 MW
Answer is Right!
Answer is Wrong!
Detailed SolutionWith direct water cooling it is possible to have ratings of about
8. An induction wattmeter can be used for
both D.C. and A.C.
D.
and A.C. B.
any of the above
Answer is Right!
Answer is Wrong!
9. To avoid the effect of stray magnetic field in
magnetic screening
Wagner earthing device
bridges we can use A. magnetic screening B. Wagner earthing device C. wave filters
any of the above
Answer is Right!
Answer is Wrong!
Detailed SolutionTo avoid the effect of stray magnetic field in
10. The operating voltage of a meggar is about
6 V
12 V
40 V
100 V
Answer is Right!
Answer is Wrong!