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