Q. In Hopkinson’s test, two machines are connected in ______________

View solution

Q. Hopkinson’s test requires ____________

View solution

Q. Hopkinson’s test of D.C. machines is conducted at _______________

View solution

Q. Retardation curve is ______________

View solution

Q. In retardation test _____________

View solution

Q. While carrying out retardation test, if t is equal to time constant then _____________

View solution

Q. Which of the following is not a disadvantage of a Swinburne’s test?

View solution

Q. Efficiency calculated by Swinburne’s test is _____________

View solution

Q. What is the purpose of performing retardation test after Swinburne’s test?

View solution

Q. In order to run motor on rated speed while carrying out Swinburne’s test we add ______________

View solution

Q. While carrying out Swinburne’s test at rated armature voltage motor will run at ____________

View solution

Q. Which losses can be identified from Swinburne’s test?

View solution

Q. Which of the following test will be suitable for testing two similar DC series motors of large capacity?

View solution

Q. Swinburne’s test can be carried out on all DC motors.

View solution

Q. Variable losses are proportional to ________

View solution

Q. Which of the following losses is not under constant losses?

View solution

Q. In the DC motor the iron losses occur in __________

View solution

Q. Why retardation test is carried on DC machine?

View solution

Q. Nature of efficiency curve of DC machine is _________________

View solution

Q. If DC generators are located near load centres, which losses can be minimised?

View solution