DC Machines MCQs : This section focuses on the "Basics" in DC Machines. These Multiple Choice Questions (MCQ) should be practiced to improve the DC Machines skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
In DC Machine, DC stands for?
A. Direct circuit
B. Direct current
C. Direct conversion
D. Device current
Question 2
How many types of DC machines there?
A. 2
B. 3
C. 4
D. 5
Question 3
A DC generator converts?
A. DC electrical power into mechanical power
B. DC electrical energy into mechanical energy
C. mechanical power into DC electrical power
D. mechanical energy into DC electrical energy
Question 4
The rotating electrical or DC machine has mainly _______ parts.
A. 4
B. 3
C. 2
D. 1
Question 5
The windings in which voltage is induced is called the Armature windings
A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
Question 6
A DC motor converts ?
A. DC electrical energy into mechanical energy
B. mechanical energy into DC electrical energy
C. mechanical power into DC electrical power
D. DC electrical power into mechanical power
Question 7
The stator and rotor are separated from each other by an air gap.
A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
Question 8
Why are the DC motors preferred for traction applications?
A. Torque and speed are inversely proportional to armature current
B. Torque is proportional to armature current
C. Torque is proportional to square root of armature current
D. The speed is inversely proportional to the torque and the torque is proportional to square of armature current
Question 9
Which of the following motors can be used to drive the rotary compressor?
A. DC shunt motor
B. Synchronous motor
C. DC series motor
D. Universal motor
Question 10
Separately excited DC generators are still used in _________________
A. Thermal power plants
B. Hydro power plant
C. Ward Leonard speed control system
D. In all fields