These are five sample questions from Bryq’s Auto Mechanic assessment, a job-specific test for hiring auto mechanics, automotive technicians, and service technicians. The full assessment covers five skills: automotive knowledge, mechanical systems, electric power systems, electronic systems, and vehicle diagnostics. Questions test technical knowledge of vehicle components alongside practical diagnostic scenarios, each with four options and one correct answer.
Auto Mechanic Knowledge
Question
What does an engine oil viscosity rating such as 5W-30 indicate?
Select your answer
How easily the oil flows at cold and at operating temperatures.
The minimum oil pressure the engine requires.
The percentage of detergent additives in the oil.
The maximum mileage between oil changes.
WHY IS THIS THE CORECT ANSWER
The first number, followed by W for winter, rates how well the oil flows when cold. The second rates its viscosity at normal operating temperature. A lower first number means the oil reaches engine parts faster at start-up, when most wear occurs.
Mechanical Systems
Question
A customer reports a clicking noise from the front of a front-wheel-drive car that gets louder when turning sharply at low speed. Which component is most likely worn?
Select your answer
Outer CV joint.
Wheel bearing.
Strut mount.
Brake caliper slide pins.
WHY IS THIS THE CORECT ANSWER
Outer CV joints flex most when the wheels are turned, so a worn joint clicks rhythmically during tight, low-speed turns.
Electric Power Systems
Question
During a voltage drop test with the engine cranking, a technician measures 0.9 V between the battery negative post and the engine block. What does this indicate?
Select your answer
Excessive resistance in the ground circuit.
A normal reading for a ground circuit under load.
A weak battery that can’t hold voltage under load.
A faulty starter solenoid on the positive side.
WHY IS THIS THE CORECT ANSWER
A healthy ground circuit should drop no more than a few tenths of a volt under cranking load. A 0.9 V drop between the negative post and the block points to a corroded or loose ground connection, which starves the starter of current even when the battery is good.
Electronic Systems
Question
What is the main job of a crankshaft position sensor?
Select your answer
Tell the ECU the crankshaft’s speed and position for timing.
Report the camshaft’s position for valve timing.
Measure how far the throttle plate is open.
Detect engine knock so the ECU can retard ignition.
WHY IS THIS THE CORECT ANSWER
The ECU uses the crankshaft position signal to time spark and fuel injection and to calculate engine speed. That’s why a failed sensor often causes a no-start or stalling.
Vehicle Diagnostics
Question
A vehicle stores a P0302 code (cylinder 2 misfire). The technician swaps the ignition coils between cylinders 2 and 3, and the code changes to P0303. What is the most likely cause?
Select your answer
A faulty ignition coil.
A vacuum leak near cylinder 2.
A faulty fuel injector on cylinder 2.
Low compression in cylinder 2.
