Dc Machines Pmdc Motors Online Exam Quiz
Dc Machines Pmdc Motors GK Quiz. Question and Answers related to Dc Machines Pmdc Motors. MCQ (Multiple Choice Questions with answers about Dc Machines Pmdc Motors
In PMDC magnetic material is placed instead of _____________
Options
A : Armature
B : Rotor
C : Stator
D : Can be placed anywhere
PMDC produces high torque on ______________
Options
A : At low speeds
B : Only at maximum speed
C : Torque is constant
D : Cannot say
What is the air gap flux density for PMDC motor?
Options
A : Bg= µ0(tm/lg) Hm
B : Bg= – µ0Hm
C : Bg= – µ0(tm/lg) Hm
D : Bg= – µ0(lg/tm) Hm
PMDC motor offers ___________
Options
A : Cumulative compound type characteristic
B : Differential compound type characteristic
C : Series characteristic
D : Shunt characteristic
Which speed control method is employed in PMDC?
Options
A : Field control method
B : Armature control method
C : Armature Field control method
D : Cannot be determined
In PMDC motors we use magnetic material with ___________
Options
A : Low residual flux
B : Low coercivity
C : High residual flux
D : All magnetic materials
Which of the following is most favoured choice for PMDC motor?
Options
A : Neodymium-iron-boron
B : Iron-nickel
C : Nickel-neodymium
D : Cannot be given
PMDC motors are _________________
Options
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 motor
If higher terminal voltage is applied to PMDC what will happen?
Options
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 constant
Speed-torque characteristic of PMDC motors is _______________
Options
A : Starting from zero increasing continuously
B : Starting from some positive value and remaining constant
C : Starting from some positive value and decreasing exponentially
D : Starting from some positive value and decreasing on straight line
Dc Machines Applications Dc Machines more Online Exam Quiz
Dc Machines Operating Characteristics Dc Compound Motor 1
Dc Machines Operating Characteristics Dc Series Motor 1
Dc Machines Operating Characteristics Dc Shunt Motor 1
Dc Machines Parallel Operation Dc Generator
Dc Machines Speed Control Using Field Control Shunt Motor