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