Home
About Us
Contact Us
Privacy Policy
Search
Home
→
D.C. Motors
→
The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is______________?
Related MCQs
Ward Leonard method of speed control is basically a__________?
Which of the following test can be performed on DC series motor?
Armature reaction in dc motor results__________?
In a DC motor the inter-pole winding is connected in__________?
A dc series motor should not be started on no load because it would__________?
Which of the following method is used for the speed control of DC shunt motor?
If the field winding resistance of a DC shunt motor is increases, its speed will__________?
With the increase in temperature, the speed of DC series motor__________?
With the increase in temperature, the speed of DC shunt motor__________?
In which of the following device the generated emf and armature current are in the opposite directions?
If the load on a DC shunt motor is increases, its speed is slightly reduced due to__________?
One D.C. motor drives another D.C. motor. The second D.C. motor when excited and driven__________?
The speed of a D.C. shunt motor is required to be more than full load speed. This is possible by__________?
In the D.C. motor the iron losses occur in__________?
Which D.C. motor has got maximum self relieving property ?
D.C. motor is to a drive a load which is almost nil for certain part of the load cycle and peak value for short duration. We will select this__________?
D.C. motor is to drive a load which has certain minimum value for most of the time and some peak value for short duration. We will select the__________?
If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens__________?
Where D.C. motor of H.P. 12 or more requires frequent starting, stopping, reversing and speed control__________?
When the armature of a D.C. motor rotates, e.m.f. induced is__________?
In variable speed motor__________?
Which method of braking is generally used in elevators ?
For which types of D.C. motor, dynamic braking is generally used ?
During rheostat braking of D.C. series motors__________?
Hopkinson’s test on D.C. machines is conducted at__________?
Which of the following tests will be suitable for testing two similar D.C. series motors of large capacity ?
The purpose of retardation test on D.C. shunt machines is to find out__________?
D.C. generators are installed near the load centres to reduce__________?
In a D.C. generator, the iron losses mainly take place in__________/
D.C. generators are normally designed for maximum efficiency around__________?
The condition for maximum efficiency for a D.C. generator is__________?
The total losses in a well designed D.C. generator of 10 kW will be nearly__________?
Which of the following losses are significantly reduced by laminating the core of a D.C. generator ?
Which of the following loss in a D.C. generator is dissipated in the form of heat?
Which of the following steps is likely to result in reduction of hysteresis loss in a D.C. generator ?
In a manual shunt motor starter?
D.C. shunt motors are used for driving__________?
Torque developed by a D.C. motor depends upon__________?
Which of the following loss in a D.C. generator varies significantly with the load current ?
The losses occurring in a D.C. generator are given below. Which loss is likely to have highest proportion at rated load of the generator ?
In a D.C. generator all of the following could be the effects of iron losses except__________?
The hysteresis loss in a D.C. machine least depends on__________?
Regenerative method of braking is based on that__________?
The main disadvantage of the Ward-Leonard control method is__________?
In Ward-Leonard control the lower limit of speed is imposed by________?
For constant torque drive which speed control method is preferred ?
Ward-Leonard control is basically a__________?
Which motor should not be started on no-load ?
Which of the following motors is most suitable for signalling devices and many kinds of timers ?
Which of the following motors is usually used in house-hold refrigerators ?
Why are the D.C. motors preferred for traction applications ?
The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is______________?
A. 4.0
B. 2.0
C. 1.0
D. 0.5
Correct Answer:
0.5
✔
Last Updated:
December 12, 2018