Which of the following is an example of a constant load application for a DC shunt generator?

Explanation:

The application of DC Motors are as follows:

DC shunt motor

• Shunt DC motors are utilized in Centrifugal Pumps, Lifts, Weaving Machines, Lathe Machines, Blowers, Fans, Conveyors, Spinning Machines, and other applications where a consistent speed is required.
   

DC series motor 

• DC series motors are used where high starting torque is required. Major applications for DC motors are elevators, steel mills, rolling mills, locomotives, and excavators.
   

Cumulative compound DC motor

• It has high starting torque and has varying speeds within limits i.e. it has self-adjustable speed with changing load. These are used where we require sudden heavy loads for a short duration.​
• Hence, it is used for driving constant speed line shafts, lathes, constant speed head centrifugal pumps, fans woodworking machines, reciprocating pumps, etc.
   

Differentially compound DC motor

• The differential compound generators are used for arc welding purposes where a large voltage drop and constant current are required.