MCQ ON DC GENERATOR

What is the main function of a DC generator?

• a) To convert mechanical energy into electrical energy
  
  
  

• b) To convert electrical energy into mechanical energy

• c) To store electrical energy

• d) To control the voltage of the system

The commutator of a DC generator is used to:

• a) Reverse the direction of current
  
  
  

• b) Change mechanical energy into electrical energy

• c) Regulate the speed of the generator

• d) Increase the efficiency of the generator

The primary source of mechanical energy in a DC generator is:

• a) Battery
  
  
  

• b) A steam turbine

• c) A diesel engine

• d) A moving magnetic field

The armature in a DC generator is made of:

• a) Copper
  
  
  

• b) Steel

• c) Aluminium

• d) Iron

Which part of a DC generator produces the direct current?

• a) Stator

• 
  b) Armature

• c) Commutator

• 
  
  d) Field winding

What is the function of the field winding in a DC generator?

• a) To generate mechanical energy
  
  
  

• b) To create the magnetic field

• c) To convert AC to DC

• d) To reduce losses in the generator

In which type of DC generator the field winding is connected in series with the armature?

• a) Series DC generator
  

• b) Shunt DC generator
  

• c) Compound DC generator
  

• d) Both a and c

In a shunt DC generator, the field winding is connected:

• a) In parallel with the armature
  

• b) In series with the armature
  

• c) In parallel with the load

• d) To the rotor only

The induced EMF in a DC generator is proportional to:

• a) The speed of the armature
  

• b) The flux per pole
  

• c) The number of conductors on the armature
  

• d) All of the above

In a DC generator, generally which type of brush is used to collect the current from the commutator?

• a) Carbon brush
  

• b) Copper brush
  

• c) Steel brush
  

• d) Aluminium brush