Mechanical Comprehension – Test 3 0% 62 Time Expired This subtest has 16 questions and a time limit of 20 minutes 1 / 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: pinion flywheel rack 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. 2 / 16 What law does the force developed in a spring obey? Law of Least Resistance Hamilton's law Newton's 16th law of motion Hooke's law The force developed in a spring obeys Hooke's Law. The force developed in a spring obeys Hooke's Law. 3 / 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 rotational work axle rotation 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. 4 / 16 An inclined plane permits you to overcome a large: inertia resistance fulcrum friction An inclined plane permits you to overcome a large resistance. An inclined plane permits you to overcome a large resistance. 5 / 16 A metric system of units means that values can be calculated by factors of: one infinity 10 mass 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. 6 / 16 What is the benefit of using ball bearings or roller bearings in a machine? sliding friction is less than rolling friction metal is smoother than oil greater mass equals more friction rolling friction is 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. The benefit of using ball bearings or roller bearings in a machine is that rolling friction is always less than sliding friction. 7 / 16 Pressure is the amount of force within a specific: container area tube fluid Pressure is the amount of force within a specific area. Pressure is the amount of force within a specific area. 8 / 16 Pressure that is less than normal air pressure is called a: depression vacuum puncture 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. 9 / 16 When two external gears mesh, they always turn in what directions? opposite same upward lower When two external gears mesh, they always turn in the opposite directions. When two external gears mesh, they always turn in the opposite directions. 10 / 16 In what type of system does mass remain constant and the net external force on the system is zero? closed sytem frozen system elastic system balanced system 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. 11 / 16 Third-class levers increase speed at the expense of: speed force friction mass Third-class levers increase speed at the expense of force. Third-class levers increase speed at the expense of force. 12 / 16 What can used to change rotary motion into linear motion? bevel worm drive miter cams Cams can used to change rotary motion into linear motion. Cams can used to change rotary motion into linear motion. 13 / 16 The Law of Conservation of Momentum states: Momentum requires opposing forces total mass of a system remains the same 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. 14 / 16 Equilibrium is achieved when the forces on a system are: inverse balanced net net hyperactive Equilibrium is achieved when the forces on a system are balanced. Equilibrium is achieved when the forces on a system are balanced. 15 / 16 When two gears of unequal size are meshed together, the smaller of the two is usually called a: flywheel pinion rack 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. 16 / 16 In all machines, the actual mechanical advantage equals the resistance divided by the: friction effort load 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. Your score is 0% Exit