Related InterviewSolutions

• If higher terminal voltage is applied to PMDC what will happen?(a) Speed at 0 torque will be reduced(b) Torque at 0 speed will be reduced(c) Torque at 0 speed will be increased(d) Torque will remain constantThis question was addressed to me in a national level competition.I need to ask this question from PMDC Motors in division DC Machines of DC Machines
• PMDC gives better speed regulation than DC shunt motor.(a) True(b) FalseI got this question during an interview.This interesting question is from PMDC Motors in section DC Machines of DC Machines
• PMDC produces high torque on ______________(a) At low speeds(b) Only at maximum speed(c) Torque is constant(d) Cannot sayThis question was addressed to me in final exam.I want to ask this question from PMDC Motors in division DC Machines of DC Machines
• Which of the following is most favoured choice for PMDC motor?(a) Neodymium-iron-boron(b) Iron-nickel(c) Nickel-neodymium(d) Cannot be givenI had been asked this question in semester exam.My doubt stems from PMDC Motors topic in section DC Machines of DC Machines
• What is the air gap flux density for PMDC motor?(a) Bg= µ0(tm/lg) Hm(b) Bg= – µ0Hm(c) Bg= – µ0(tm/lg) Hm(d) Bg= – µ0(lg/tm) HmThe question was posed to me during an internship interview.Query is from PMDC Motors topic in portion DC Machines of DC Machines
• Which speed control method is employed in PMDC?(a) Field control method(b) Armature control method(c) Armature Field control method(d) Cannot be determinedI have been asked this question by my school principal while I was bunking the class.Query is from PMDC Motors topic in chapter DC Machines of DC Machines
• PMDC motors are _________________(a) Smaller than corresponding rated field wound motor(b) Larger than corresponding rated field wound motor(c) Almost same size that of corresponding rated field wound motor(d) Can be smaller or greater than corresponding rated field wound motorThis question was posed to me in a national level competition.I would like to ask this question from PMDC Motors in portion DC Machines of DC Machines
• In PMDC magnetic material is placed instead of _____________(a) Armature(b) Rotor(c) Stator(d) Can be placed anywhereI have been asked this question during an internship interview.Enquiry is from PMDC Motors in section DC Machines of DC Machines
• PMDC motor offers ___________(a) Cumulative compound type characteristic(b) Differential compound type characteristic(c) Series characteristic(d) Shunt characteristicI have been asked this question in an international level competition.I'd like to ask this question from PMDC Motors topic in section DC Machines of DC Machines
• In PMDC motors we use magnetic material with ___________(a) Low residual flux(b) Low coercivity(c) High residual flux(d) All magnetic materialsThe question was asked in a national level competition.The doubt is from PMDC Motors topic in division DC Machines of DC Machines