[amp_mcq option1=”load is balanced only” option2=”load is unbalanced only” option3=”on balanced as well as unbalanced loads” option4=”none of the above” correct=”option3″]
Detailed SolutionDelta/star transformer works satisfactorily when
Transformers
2. In case of a double cage induction motor, the inner cage has
[amp_mcq option1=”high inductance arid low resistance” option2=”low inductance and high resistance” option3=”low inductance and low resistance” option4=”high inductance and high resistance” correct=”option1″]
Detailed SolutionIn case of a double cage induction motor, the inner cage has
3. Which of the following does not change in a transformer?
[amp_mcq option1=”Current” option2=”Voltage” option3=”Frequency” option4=”All of the above” correct=”option3″]
Detailed SolutionWhich of the following does not change in a transformer?
4. Which of the following does not change in an ordinary transformer?
[amp_mcq option1=”Frequency” option2=”Voltage” option3=”Current” option4=”Any of the above” correct=”option2″]
Detailed SolutionWhich of the following does not change in an ordinary transformer?
5. A no-load test is performed on a transformer to determine
[amp_mcq option1=”core loss” option2=”copper loss” option3=”efficiency” option4=”magnetising current E. magnetising current and loss” correct=”option4″]
Detailed SolutionA no-load test is performed on a transformer to determine
6. The secondary winding of which of the following transformers is always kept closed?
[amp_mcq option1=”Step-up transformer” option2=”Step-down transformer” option3=”Potential transformer” option4=”Current transformer” correct=”option3″]
Detailed SolutionThe secondary winding of which of the following transformers is always kept closed?
7. A transformer transforms
[amp_mcq option1=”voltage” option2=”current” option3=”power” option4=”frequency” correct=”option1″]
8. The transformer ratings are usually expressed in terms of
[amp_mcq option1=”volts” option2=”amperes” option3=”kW” option4=”kVA” correct=”option4″]
Detailed SolutionThe transformer ratings are usually expressed in terms of
9. The starting torque of a squirrel-cage induction motor is
[amp_mcq option1=”low” option2=”negligible” option3=”same as full-load torque” option4=”slightly more than full-load torque” correct=”option1″]
Detailed SolutionThe starting torque of a squirrel-cage induction motor is
10. The path of the magnetic flux in transformer should have
[amp_mcq option1=”high reluctance” option2=”low reactance” option3=”high resistance” option4=”low resistance” correct=”option1″]
Detailed SolutionThe path of the magnetic flux in transformer should have