Question
a.
As it carries large load current
b.
To provide large flux
c.
In order to reduce eddy current to provide large flux
d.
To reduce the of insulting materials
Posted under DC Machines
Interact with the Community - Share Your Thoughts
Uncertain About the Answer? Seek Clarification Here.
Understand the Explanation? Include it Here.
Q. Why field winding of a DC series motor is provided with thick wire?
Similar Questions
Explore Relevant Multiple Choice Questions (MCQs)
Q. Why starters are required in a DC motor?
View solution
Q. For which motors DOL starter can be used?
View solution
Q. A three-point starter is used for _________
View solution
Q. The starting resistance of a DC shunt motor is generally ______
View solution
Q. In a manual shunt motor starter relay positions are ________________________
View solution
Q. What will happen if DC motor is used without starter?
View solution
Q. Motor will start quickly when used without starter.
View solution
Q. In shunt and compound motor starting the shunt field should be made on with full starting resistance in ____________
View solution
Q. A starter is required for a 220-V shunt motor. The maximum allowable current is 55 A and the minimum current is about 35 A. The armature resistance of the motor is 0.4 Ω. What will be the number of sections of starter resistance required?
View solution
Q. γ is given as 1.585. Resistance at maximum allowable current is given equal to 4 Ω, what is the 5th step resistance?
View solution
Q. Four-point starter is used when ______________
View solution
Q. In three-point starter, as a starting handle is rotated __________
View solution
Q. How much torque is ensured by resistance adding arrangement in 3-point starter?
View solution
Q. The resistance of NVC is _______
View solution
Q. NVC will release the handle electromagnetically when ________
View solution
Q. Over-load coil performs the function when __________
View solution
Q. In 4-point starters the resistance is added in series with NVC because __________________
View solution
Q. What will be the γ value for starter taking 4 steps, where ratio of resistance at maximum allowable current to armature resistance is equal to 1.8?
View solution
Q. Maximum allowable current for a 240-V DC shunt motor is equal to 65 A. Minimum allowable current for same is equal to 40 A. What will be the value of γ?
View solution
Q. For a certain machine having γ = 1.8, we are using starter with 5 steps. What will be the resistance at step 3 if step 2 resistance is equal to 2 Ω?
View solution
Recommended Subjects
Are you eager to expand your knowledge beyond DC Machines? We've handpicked a range of related categories that you might find intriguing.
Click on the categories below to discover a wealth of MCQs and enrich your understanding of various subjects. Happy exploring!