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 are meshed together, the smaller of the two is usually called a: rack pinion shaft flywheel 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 The Law of Conservation of Momentum states: total mass of a system remains the same momentum of an open system remains the same total momentum of a closed system cannot change Momentum requires opposing forces 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. 3 / 16 What is the benefit of using ball bearings or roller bearings in a machine? metal is smoother than oil sliding friction is less than rolling friction 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. 4 / 16 Pressure is the amount of force within a specific: area container tube fluid Pressure is the amount of force within a specific area. Pressure is the amount of force within a specific area. 5 / 16 In what type of system does mass remain constant and the net external force on the system is zero? frozen system elastic system balanced 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. 6 / 16 Pressure that is less than normal air pressure is called a: puncture leak depression vacuum Pressure that is less than normal air pressure is called a vacuum. Pressure that is less than normal air pressure is called a vacuum. 7 / 16 In all machines, the actual mechanical advantage equals the resistance divided by the: effort load friction 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. 8 / 16 Equilibrium is achieved when the forces on a system are: net net balanced hyperactive inverse Equilibrium is achieved when the forces on a system are balanced. Equilibrium is achieved when the forces on a system are balanced. 9 / 16 An inclined plane permits you to overcome a large: inertia friction resistance fulcrum An inclined plane permits you to overcome a large resistance. An inclined plane permits you to overcome a large resistance. 10 / 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: rotational work torque mass work axle rotation 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. 11 / 16 What law does the force developed in a spring obey? Hooke's law Newton's 16th law of motion Law of Least Resistance Hamilton's law The force developed in a spring obeys Hooke's Law. The force developed in a spring obeys Hooke's Law. 12 / 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. 13 / 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. 14 / 16 What can used to change rotary motion into linear motion? cams worm drive bevel miter Cams can used to change rotary motion into linear motion. Cams can used to change rotary motion into linear motion. 15 / 16 When two external gears mesh, they always turn in what directions? upward lower same 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. 16 / 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: flywheel shaft pinion 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. Your score is 0% Exit