MCQs 1: Kingdom Protoctista includes_______________?
MCQs 2: The size of poxvirus is_______________?
MCQs 3: No-load speed of which of the following motor will be highest ?
MCQs 4: The direction of rotation of a D.C. series motor can be changed by___________?
interchanging supply terminals
interchanging field terminals
either of A. and B. above
None of the above
MCQs 5: Which of the following application requires high starting torque ?
MCQs 6: If a D.C. motor is to be selected for conveyors, which rriotor would be preferred ?
MCQs 7: Which D.C. motor will be preferred for machine tools ?
MCQs 8: Differentially compound D.C. motors can find applications requiring___________?
MCQs 9: Which D.C. motor is preferred for elevators ?
MCQs 10: According to Fleming’s left-hand rule, when the forefinger points in the direction of the field or flux, the middle finger will point in the direction of_________________?
MCQs 11: If the field of a D.C. shunt motor gets opened while motor is running______________?
the speed of motor will be reduced %
the armature current will reduce
the motor will attain dangerously high speed 1
the motor will continue to nuvat constant speed
MCQs 12: Starters are used with D.C. motors because______________?
these motors have high starting torque
these motors are not self-starting
back e.m.f. of these motors is zero initially
to restrict armature current as there is no back e.m.f. while starting
MCQs 13: In D.C. shunt motors as load is reduced__________________?
the speed will increase abruptly
the speed will increase in proportion to reduction in load
the speed will remain almost/constant
the speed will reduce
MCQs 14: A D.C. series motor is that which______________?
has its field winding consisting of thick wire and less turns
has a poor torque
can be started easily without load
has almost constant speed
MCQs 15: For starting a D.C. motor a starter is required because___________?
it limits the speed of the motor
it limits the starting current to a safe value
it starts the motor
none of the above
MCQs 16: The type of D.C. motor used for shears and punches is_____________?
MCQs 17: If a D.C. motor is connected across the A.C. supply it will_______________?
run at normal speed
not run
run at lower speed
burn due to heat produced in the field winding by .eddy currents
MCQs 18: To get the speed of D.C, motor below the normal without wastage of electrical energy is used?
MCQs 19: When two D.C. series motors are connected in parallel, the resultant speed is____________?
MCQs 20: The speed of a D.C. shunt motor more than its full-load speed can be obtained by_____________?
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