Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is slip in the context of induction motors?
💡 Hint: Think about how speed differences influence motor function.
Question 2
Easy
Name one starting method for three-phase induction motors.
💡 Hint: This method connects the motor directly to the power supply.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the formula for calculating slip?
- (Ns - Nr) / Ns
- (Nr - Ns) / Nr
- Ns / Nr
💡 Hint: Keep the concept of speed differences in mind.
Question 2
A Direct-On-Line (DOL) starter reduces starting current significantly.
- True
- False
💡 Hint: Consider what happens when a motor starts directly from the line voltage.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A three-phase induction motor has a synchronous speed of 1500 RPM and operates at a slip of 4%. Calculate:
1. Rotor speed (Nr)
2. What would the slip be at full load if the rotor speed drops to 1440 RPM?
💡 Hint: Use the slip formula for both calculations!
Question 2
An induction motor has a power input of 20 kW, with stator losses of 800 W and rotor losses of 500 W. Calculate the overall efficiency and explain how losses affect efficiency.
💡 Hint: Keep the losses in mind when calculating efficiency!
Challenge and get performance evaluation