Dc Machines Swinburnes Test Online Exam Quiz
Dc Machines Swinburnes Test GK Quiz. Question and Answers related to Dc Machines Swinburnes Test. MCQ (Multiple Choice Questions with answers about Dc Machines Swinburnes Test
Efficiency calculated by Swinburne’s test is _____________
Options
A : Exactly equal
B : Over-estimated
C : Under-estimated
D : Depends on the manual errors
In retardation test _____________
Options
A : Motor switch is made ON and various speed readings are taken
B : At rated speed various speed readings are taken out at different times
C : Motor switch is made OFF at rated speed and various speed readings are taken
D : Some readings are taken while speed is building up and some readings while speed is lowering down
Which losses can be identified from Swinburne’s test?
Options
A : No-load core loss
B : Windage and friction loss
C : No-load and windage and friction loss
D : Stray load loss
In order to run motor on rated speed while carrying out Swinburne’s test we add ______________
Options
A : Resistance in parallel with armature
B : Resistance in series with armature
C : Inductor in series with armature
D : Capacitor in parallel with armature
While carrying out Swinburne’s test at rated armature voltage motor will run at ____________
Options
A : Speed equal to rated speed
B : Speed greater than rated speed
C : Speed less than rated speed
D : Can run anywhere
While carrying out retardation test, if t is equal to time constant then _____________
Options
A : Speed increases to 36.8% of its initial value
B : Speed reduces to 36.8% of its initial value
C : Speed reduces to 26.8% of its initial value
D : Speed reduces to 46.8% of its initial value
Retardation curve is ______________
Options
A : Starting from origin
B : Starts from some positive value and increasing
C : Starts from some positive curve and stays constant
D : Starts from some positive value and decreases
Which of the following test will be suitable for testing two similar DC series motors of large capacity?
Options
A : Swinburne’s test
B : Hopkinson’s test
C : Field test
D : Brake test
Which of the following is not a disadvantage of a Swinburne’s test?
Options
A : The stray-load losses can’t be determined by this test
B : Steady temperature rise can’t be determined
C : Does not give results about satisfactory commutation
D : Machine gets damaged
What is the purpose of performing retardation test after Swinburne’s test?
Options
A : To find stray load loss
B : To find variable losses
C : To separate out windage and friction losses
D : To find shunt field losses
Dc Machines Applications Dc Machines more Online Exam Quiz
Dc Machines Speed Control Using Field Control Shunt Motor
Dc Machines Starting Dc Motors 1
Dc Machines Ward Leonard Speed Control Method