49) A DC shunt motor connected through a 4 point starter starts normally when the starter handle is moved from OFF position to ON position. But the starter handle does not remain in ON position. One of the reason for the above is open in :

50) For which one of the following applications, D.C. shunt motor is used ?

51) The full load current of a 10 kW, 250 V, D.C. motor will be :

52) Which type of D.C. motor is preferred for Elevators ?

53) Which type of D.C. motor is used for elevators ?