FREE AFCT Mechanical Aptitude Questions and Answers
Which of the following tools would be best used for tightening a bolt?
A wrench is the proper tool for tightening or loosening bolts and nuts. Hammers are used for striking, screwdrivers for screws, and pliers for gripping objects.
What type of simple machine is a pulley system?
A pulley is a type of simple machine that consists of a wheel with a groove to hold a rope or cable. It can be used to change the direction of force and, in certain systems, can provide mechanical advantage.
Which of the following would reduce friction between two surfaces?
Lubricants, such as oil or grease, reduce friction by creating a thin layer between surfaces, allowing them to move more smoothly against each other. Increasing weight or roughening the surfaces would increase friction, and increasing temperature might increase the friction between surfaces.
A car’s engine operates using a system that converts heat energy into mechanical energy. This process is known as:
Combustion is the chemical process in which fuel reacts with oxygen to produce heat, which is then converted into mechanical energy in the engine. This is the basic principle of how most internal combustion engines work.
In a simple machine, if you use a lever to lift a heavy load, which of the following will increase your mechanical advantage?
Mechanical advantage is increased when the effort arm (the distance from the fulcrum to where the force is applied) is longer. A longer effort arm allows you to lift a heavier load with less effort.