ASVAB (Armed Services Vocational Aptitude Battery)Auto and Shop Information (AS)Medium
A homeowner is attempting to loosen a rusted bolt on an outdoor metal swing set. They have tried a standard wrench without success. Which of the following tools would be most effective for applying increased torque to the bolt?
- ASocket wrench with a breaker bar
- BImpact driver
- CAdjustable wrench
- DPipe wrench
Show answer & explanationAnswer & explanation
Correct answer: A. Socket wrench with a breaker bar
A socket wrench with a breaker bar provides significantly more leverage than standard wrenches, allowing for greater torque application to stubborn or rusted fasteners without rounding the bolt head.
Why the other options are wrong
- B. An impact driver delivers rotational force with hammer blows, which is effective but a breaker bar is typically preferred for initial loosening of very tight bolts due to direct, continuous torque.
- C. An adjustable wrench can round off rusted bolts and does not offer superior leverage.
- D. A pipe wrench is designed for gripping pipes, not for fasteners, and can damage bolt heads.
Breaker Bar
A long, non-ratcheting bar used with sockets to apply high torque to loosen stubborn fasteners.
- Provides maximum leverage for loosening.
- Does not have a ratcheting mechanism.
- Used when a standard ratchet cannot provide enough force.
Memory trick: Leverage is the key to turning the unmovable.