How speed of the DC shunt motor can be increased?(a) Decreasing the field current(b) Increasing the field current(c) Decreasing the load current(d) Increasing the armature currentI have been asked this question in quiz.I want to ask this question from Operating Characteristics of DC Shunt Motor -1 in chapter Characteristics of DC Motors of DC Machines

How speed of the DC shunt motor can be increased?(a) Decreasing the fi

1.	How speed of the DC shunt motor can be increased?(a) Decreasing the field current(b) Increasing the field current(c) Decreasing the load current(d) Increasing the armature currentI have been asked this question in quiz.I want to ask this question from Operating Characteristics of DC Shunt Motor -1 in chapter Characteristics of DC Motors of DC Machines
Answer» Right choice is (B) Increasing the field current Easiest explanation: For a CONSTANT load, load current will remain constant. Decreasing ARMATURE current will help in increasing speed for DC shunt motor. Since load current is addition of armature current and field current we’ll GET less armature current for more field current.

Discussion

No Comment Found

Related InterviewSolutions

DC motor is to drive a load which is having certain minimum value for most of the time and some peak value for short duration. We will select the _______(a) Series motor(b) Shunt motor(c) Compound motor(d) Cannot be determinedThis question was addressed to me in an interview.My question comes from Operating Characteristics of DC Series Motor topic in section Characteristics of DC Motors of DC Machines
Which DC motor has got maximum self-relieving property?(a) Series motor(b) Shunt motor(c) Cumulatively compounded motor(d) Differentially compounded motorI had been asked this question in a national level competition.My query is from Operating Characteristics of DC Series Motor topic in chapter Characteristics of DC Motors of DC Machines
Which of the following DC motor has negative speed regulation?(a) Shunt motors(b) Series motors(c) Differential compound motors(d) Series and differential compound motorsThis question was addressed to me in examination.My question is taken from Operating Characteristics of DC Compound Motor topic in section Characteristics of DC Motors of DC Machines
For strong series field, speed-torque characteristic of cumulative compound motor lies __________(a) Above series motor characteristic if current is less than full load current(b) Above shunt motor characteristic if current is less than full load current(c) Below series motor characteristic if current is more than full load current(d) Below series motor characteristic if current is less than full load currentI had been asked this question in exam.Asked question is from Operating Characteristics of DC Compound Motor in portion Characteristics of DC Motors of DC Machines
Torque-current characteristic of DC cumulative compound motor _____________(a) Lies above shunt motor characteristic(b) Lies below shunt motor characteristic(c) Lies above of series and shunt motor characteristic both(d) Lies between of series and shunt motor characteristic bothI got this question in an online quiz.This question is from Operating Characteristics of DC Compound Motor in chapter Characteristics of DC Motors of DC Machines
Torque of the cumulative compound DC motor is _____________(a) Addition of Ia and Ia^2 term(b) Subtraction of Ia from Ia^2 term(c) Subtraction of Ia^2 from Ia term(d) Addition of -Ia and -Ia^2 termI had been asked this question in final exam.My question is taken from Operating Characteristics of DC Compound Motor in section Characteristics of DC Motors of DC Machines
Where speed-current characteristic of DC shunt motor lies with respect to DC cumulative compound motor (assume current smaller than full load current)?(a) Can be represented by same curve(b) Above(c) Below(d) Cannot be determinedThe question was posed to me at a job interview.My question is based upon Operating Characteristics of DC Compound Motor in portion Characteristics of DC Motors of DC Machines
Only motor listed below whose speed increases with increase in armature current is ___________(a) DC series motor(b) DC cumulative compound motor(c) DC shunt motor(d) DC differential compound motorI have been asked this question during an internship interview.The above asked question is from Operating Characteristics of DC Compound Motor in portion Characteristics of DC Motors of DC Machines
Where speed-current characteristic of DC shunt motor lies with respect to DC cumulative compound motor (assume current greater than full load current)?(a) Can be represented by same curve(b) Above(c) Below(d) Cannot be determinedI have been asked this question during an interview.Enquiry is from Operating Characteristics of DC Compound Motor topic in chapter Characteristics of DC Motors of DC Machines
Differential compound motor is used in large number of applications.(a) True(b) FalseThe question was posed to me during an interview for a job.Asked question is from Operating Characteristics of DC Compound Motor topic in portion Characteristics of DC Motors of DC Machines

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment