What is the primary function of an electrical machine?

• To convert mechanical energy

• To convert electrical energy into mechanical energy

• To store electrical energy

• To regulate voltage levels

Which of the following is NOT considered an electrical machine?

• Electric motor

• Electric generator

• Transformer

• Battery

What are the two main types of electrical machines based on their operation?

• AC machines and DC machines

• Synchronous and Isynchronous machines

• Motors and generators

• Induction and synchronous machines

How are DC machines classified based on how armature is connected?

• Series and parallel

• Separately excited and self-excited

• Synchronous and asynchronous

• Induction and synchronous

What type of AC machine is commonly used in industrial applications due to its rugged design?

• Synchronous motor

• Induction motor

• Universal motor

• Stepper motor

Which classification describes machines that can operate as both motors and generators?

• Synchronous machines only

• Induction machines only

• Universal machines

• Both AC and DC machines

In a DC machine, what is the purpose of the yoke?

• To support the armature winding

• To provide mechanical strength and carry magnetic flux

• To connect the brushes

• To generate torque

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

• To convert AC to DC

• To increase efficiency

• To provide mechanical support

• To regulate speed

What material is typically used for the core of electrical machines to enhance magnetic properties?

• Copper

• Aluminum

• Silicon steel

• Cast iron

What is the primary role of generators in our daily lives?

• To convert electricity into mechanical energy

• To reduce electricity consumption

• To create electricity just before it is used

• To store electricity for future use