DC Machine Quiz-2

What is the primary function of the commutator in a DC generator?

• To provide mechanical strength

• To collect the current generated in armature conductors

• To support field coils

• To reduce eddy current losses

What is the outer frame of a DC machine called?

• Commutator

• Stator

• Rotor

• Yoke

Which type of winding is characterized by overlapping coil sides?

• Single layer winding

• Lap winding

• Two layer winding

• Wave winding

What is the purpose of pole shoes in a DC machine?

• To provide mechanical strength

• To reduce eddy current losses

• To connect the armature winding

• To support field coils and spread out the flux

What is the term for the distance between the centers of two adjacent poles in a DC machine?

• Front pitch

• Coil span

• Back pitch

• Pole pitch

In a DC machine, what is the armature core primarily made of?

• Aluminum

• Cast iron

• Copper

• Laminated steel disks

What type of winding is used for high voltage and low current machines?

• Lap winding

• Wave winding

• Two layer winding

• Single layer winding

What is the function of the brushes in a DC machine?

• To provide mechanical strength

• To reduce eddy current losses

• To collect or supply current to the armature

• To support the rotor

What is the coil span if it is equal to the pole pitch?

• Multi-turn

• Single turn

• Full pitched

• Fractional pitched

What is the term for the distance between two commutator segments connected to the same armature coil?

• Commutator pitch

• Back pitch

• Front pitch

• Resultant pitch