Overheating Of Relay Contacts Or Contact Born Out Is Due To______________

A. slow making and breaking of load circuit contacts
B. foreign matter on the contact surface
C. too low contact pressure
D. all of the above

A. induction B. solid state C. thermal D. electromagnetic E. all above...

A. high temperature B. increase of mean free path C. increasing field strength D. all of the above...

A. 1 mega ohms B. 10 mega ohms C. 100 mega ohms D. 500 mega ohms...

A. hydro-electric generators B. steam turbine generators C. gas turbine generators D. all of the above E. none of the above...

A. transmission line B. motor C. generator D. feeder...

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