Practice Elementary Calculations (5) - Electrical Installations, Safety, and Energy Management
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Elementary Calculations

Practice - Elementary Calculations

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

Calculate the energy consumption for a 200W bulb running for 5 hours.

💡 Hint: Convert watts to kilowatts first.

Question 2 Easy

What is the primary role of capacitor banks in electrical systems?

💡 Hint: Think about the relationship between inductive loads and power factor.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is the formula for calculating energy consumption?

Energy = Power × Time
Energy = Time / Power
Energy = Power / Time

💡 Hint: Think about how energy differs from power.

Question 2

True or False: Capacitors can improve a lagging power factor.

True
False

💡 Hint: Consider the function of capacitors in AC systems.

1 more question available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

A facility runs on a load of 800kW with a PF of 0.85. If the utility demands a PF of 0.95, what reactive power needs correcting?

💡 Hint: Use cos^-1(PF) to find angles.

Challenge 2 Hard

A battery bank has a total rating of 200Ah at 48V. If it supports a 600W load while maintaining 0.8 DoD and 85% efficiency, calculate the backup duration.

💡 Hint: First calculate the usable capacity using the DoD.

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Reference links

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