Mechanical Comprehension – Test 3 0% 62 Time Expired This subtest has 16 questions and a time limit of 20 minutes 1 / 16 An inclined plane permits you to overcome a large: friction fulcrum resistance inertia An inclined plane permits you to overcome a large resistance. An inclined plane permits you to overcome a large resistance. 2 / 16 What is the benefit of using ball bearings or roller bearings in a machine? rolling friction is less than sliding friction sliding friction is less than rolling friction greater mass equals more friction metal is smoother than oil The benefit of using ball bearings or roller bearings in a machine is that rolling friction is always less than sliding friction. The benefit of using ball bearings or roller bearings in a machine is that rolling friction is always less than sliding friction. 3 / 16 The Law of Conservation of Momentum states: total mass of a system remains the same Momentum requires opposing forces total momentum of a closed system cannot change momentum of an open system remains the same The Law of Conservation of Momentum states that the total momentum of a closed system cannot change. The Law of Conservation of Momentum states that the total momentum of a closed system cannot change. 4 / 16 What law does the force developed in a spring obey? Law of Least Resistance Hamilton's law Hooke's law Newton's 16th law of motion The force developed in a spring obeys Hooke's Law. The force developed in a spring obeys Hooke's Law. 5 / 16 Work done on a rigid body due to the sum of the torques integrated over the angle through with the body rotates is known as: mass work axle rotation rotational work torque Work done on a rigid body due to the sum of the torques integrated over the angle through with the body rotates is known as rotational work. Work done on a rigid body due to the sum of the torques integrated over the angle through with the body rotates is known as rotational work. 6 / 16 When two gears of unequal size (meaning an unequal number of teeth) are meshed together, the smaller of the two is usually called a: shaft pinion flywheel rack When two gears of unequal size are meshed together, the smaller of the two is usually called a pinion. When two gears of unequal size are meshed together, the smaller of the two is usually called a pinion. 7 / 16 In what type of system does mass remain constant and the net external force on the system is zero? frozen system balanced system elastic system closed sytem In a closed system, mass remains constant and the net external force on the system is zero. In a closed system, mass remains constant and the net external force on the system is zero. 8 / 16 In all machines, the actual mechanical advantage equals the resistance divided by the: load friction effort mass In all machines, the actual mechanical advantage equals the resistance divided by the effort. In all machines, the actual mechanical advantage equals the resistance divided by the effort. 9 / 16 Pressure that is less than normal air pressure is called a: depression puncture vacuum leak Pressure that is less than normal air pressure is called a vacuum. Pressure that is less than normal air pressure is called a vacuum. 10 / 16 When two external gears mesh, they always turn in what directions? upward same lower opposite When two external gears mesh, they always turn in the opposite directions. When two external gears mesh, they always turn in the opposite directions. 11 / 16 When two gears of unequal size are meshed together, the smaller of the two is usually called a: flywheel rack pinion shaft When two gears of unequal size are meshed together, the smaller of the two is usually called a pinion. When two gears of unequal size are meshed together, the smaller of the two is usually called a pinion. 12 / 16 A metric system of units means that values can be calculated by factors of: mass 10 one infinity A metric system of units means that values can be calculated by factors of 10. A metric system of units means that values can be calculated by factors of 10. 13 / 16 What can used to change rotary motion into linear motion? worm drive bevel miter cams Cams can used to change rotary motion into linear motion. Cams can used to change rotary motion into linear motion. 14 / 16 Pressure is the amount of force within a specific: container area fluid tube Pressure is the amount of force within a specific area. Pressure is the amount of force within a specific area. 15 / 16 Equilibrium is achieved when the forces on a system are: net net inverse balanced hyperactive Equilibrium is achieved when the forces on a system are balanced. Equilibrium is achieved when the forces on a system are balanced. 16 / 16 Third-class levers increase speed at the expense of: force friction speed mass Third-class levers increase speed at the expense of force. Third-class levers increase speed at the expense of force. Your score is 0% Exit