[amp_mcq option1=”2 MVA” option2=”5 MVA” option3=”7.5 MVA” option4=”10 MVA” correct=”option2″]
Electrical machine design
2. In a Weston frequency meter, the magnetic axes of the two fixed coils are
[amp_mcq option1=”Parallel” option2=”Perpendicular” option3=”Inclined at 60°” option4=”Inclined at 15°” correct=”option2″]
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?
[amp_mcq option1=”Corrugations” option2=”Fins” option3=”Tubes” option4=”All of the above” correct=”option4″]
4. Operating torques in analogue instruments are
[amp_mcq option1=”deflecting and control” option2=”deflecting and damping” option3=”deflecting, control and damping” option4=”vibration and balancing” correct=”option3″]
Detailed SolutionOperating torques in analogue instruments are
5. The flash point of transformer oil should be higher than
[amp_mcq option1=”40°C” option2=”60°C” option3=”80°C” option4=”104°C” correct=”option4″]
Detailed SolutionThe flash point of transformer oil should be higher than
6. Commonly used instruments in power system measurement are
[amp_mcq option1=”induction” option2=”moving coil or iron” option3=”rectifier” option4=”electrostatic” correct=”option1″]
Detailed SolutionCommonly used instruments in power system measurement are
7. With direct water cooling it is possible to have ratings of about
[amp_mcq option1=”200 MW” option2=”300 MW” option3=”400 MW” option4=”600 MW” correct=”option2″]
Detailed SolutionWith direct water cooling it is possible to have ratings of about
8. An induction wattmeter can be used for
[amp_mcq option1=”both D.C. and A.C.” option2=”D.” option3=”and A.C. B.” option4=”any of the above” correct=”option1″]
9. To avoid the effect of stray magnetic field in
[amp_mcq option1=”magnetic screening” option2=”Wagner earthing device” option3=”bridges we can use A. magnetic screening B. Wagner earthing device C. wave filters” option4=”any of the above” correct=”option1″]
Detailed SolutionTo avoid the effect of stray magnetic field in
10. The operating voltage of a meggar is about
[amp_mcq option1=”6 V” option2=”12 V” option3=”40 V” option4=”100 V” correct=”option4″]