M

Mr. Dubey • 52.30K Points
Coach 

Q. To get the speed of DC motor below the normal speed without wastage of electrical energy we use

(A) ward leonard control
(B) rheostatic control
(C) any of the ward leonard or rheostatic method can be used
(D) not possible
Correct : Option (A)

Explanation: 
 ward leonard method of speed control is most efficient method of speed control in all aspects. we can get constant torque operation and constant power operations as well, with this method.

Share

Discusssion

Login to discuss.

Loading Comments....

Related MCQs

Q. Commercial power generation from fusion reactor is not yet possible, because

Q. In ship manufacturing, the type of layout preferred is

Q. What is the minimum curing time required in a compression molding process?

Q. Which of the following is true?

Q. We can combine the multiplicative and translational terms for 2D into a single matrix representation by expanding

Q. Internal keyway in gears can be cut in

Q. If the radiation intensity is 5 Gy/h (500 R/h) at a distance of 152.4 cm (5 feet) from a source, how far is it to the point where the radiation intens

Q. The instrument used to check the state of charge of a battery is

Q. The main purpose of providing fins on heat transfer surface is to increase the

Q. Which of the following factors will affect the definition of the radiographic image?