FireFighter Aptitude Test Tuesdays – Electrical Circuits

Every Tuesday I post a common question you might encounter during your firefighter aptitude test. This week we will be covering electrical circuits.

For more questions, have a look at the Firefighter Practice Tests – Premium Pack. They offer over 99 practice tests and over 1500 questions.

The Problem:

The circuit shown in the following figure has three resistors, R1 = 3Ω, R2 = 6Ω and R3 = 9Ω. If all of the resistors used in the circuit shown is designed to operate at a maximum of 4 Amperes, which of the three resistors may fail?

Elec3 FireFighter Aptitude Test Tuesdays – Electrical Circuits

1) All resistors will fail
2) R1 will fail
3) R2 and R3 will fail
4) No resistors will fail

The Solution:

The correct answer is #2, R1 will fail. Here is how:

If the current passing through a resistor is higher than its designed capacity, the resistor would fail.

Let us first find the value of current passing through each resistor.

Use the Ohm’s law:

The current flowing in any resistor is inversely related to its resistance value.

I = V/R

All of the resistors have a voltage V = 18 Volt across their terminals.

So,

I1 = V/R1 = 18/3 = 6 Amperes

I2 = V/R2 = 18/6 = 3 Amperes

I3 = V/R3 = 18/9 = 2 Amperes

Current I1 passing through the first resistor is higher than its design capacity. Therefore, R1 will fail.

What would you like me to solve next week? Leave your comment below!

Here's how we can help...

resume icon png 5 FireFighter Aptitude Test Tuesdays – Electrical Circuits

Resume Service

If you don't think your resume stands out above the crowd, this is the service for you. We will make your resume shine above those of your competitors. Don't let the ATS software determine if you're a good candidate! Get a keyword rich resume today! 

jobtestprep FireFighter Aptitude Test Tuesdays – Electrical Circuits

Firefighter Aptitude Testing Service

I can't repeat this enough. When it comes to landing your dream job, preparation is KEY! The best thing you can do to prepare is to constantly stay on top of your game and study frequently. Check this great service out and be ready for your next aptitude test.

firefighter interview FireFighter Aptitude Test Tuesdays – Electrical Circuits

Firefighter Interview Preparation

If you don't feel prepared for your interview, we are here to help. Don't just "wing" an interview, the best thing you can do to improve your chances is to be prepared. We not only provide you with 3-hours of coaching, but our 5-step system to allow you to craft beautiful and captivating stories that relate to the fire service.

Mastering Eligibility and Application FireFighter Aptitude Test Tuesdays – Electrical Circuits

1-on-1 Consulting

The Fire Recruitment Consulting Service is your essential guide to a firefighting career, perfect for anyone from aspiring firefighters to career changers. It transforms the daunting recruitment process into a navigable journey with personalized support and expert guidance. Our service covers everything from in-depth career insights and application strategies to test preparation and mental health resources. 

pleasurecraft FireFighter Aptitude Test Tuesdays – Electrical Circuits

Canadian Pleasure Craft Operator Card

If you don't already have your pleasure craft license, now is a great time to do it. It's a great addition to your resume and some departments even require it!

PulsePointCanada FireFighter Aptitude Test Tuesdays – Electrical Circuits

Pulse Point Canada

At Pulse Point Canada, helping responders gain new skills and knowledge or refresh them isn’t only a commitment, but also a passion. With a wide variety of courses and dedicated instructors, Pulse Point Canada makes learning easy, affordable and fun and the Professional Responder Coaching program allows you to practice and fine tune your skills even more. 

Take the First Responder or Emergency Medical Responder course and get encouraged to GO BEYOND YOUR LIMITS! 

You may also like