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 flywheel 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. 2 / 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. 3 / 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. 4 / 16 Equilibrium is achieved when the forces on a system are: inverse balanced hyperactive net net Equilibrium is achieved when the forces on a system are balanced. Equilibrium is achieved when the forces on a system are balanced. 5 / 16 Third-class levers increase speed at the expense of: mass force friction speed Third-class levers increase speed at the expense of force. Third-class levers increase speed at the expense of force. 6 / 16 The Law of Conservation of Momentum states: total mass of a system remains the same momentum of an open system remains the same Momentum requires opposing forces 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. 7 / 16 Pressure is the amount of force within a specific: area fluid tube container Pressure is the amount of force within a specific area. Pressure is the amount of force within a specific area. 8 / 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. 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 torque axle rotation 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. 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 Pressure that is less than normal air pressure is called a: depression puncture leak 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. 11 / 16 A metric system of units means that values can be calculated by factors of: 10 one infinity 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. 12 / 16 What is the benefit of using ball bearings or roller bearings in a machine? rolling friction is less than sliding friction metal is smoother than oil sliding friction is less than rolling friction greater mass equals more 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. 13 / 16 When two external gears mesh, they always turn in what directions? lower opposite upward same When two external gears mesh, they always turn in the opposite directions. When two external gears mesh, they always turn in the opposite directions. 14 / 16 What law does the force developed in a spring obey? Newton's 16th law of motion Hooke's law 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. 15 / 16 In all machines, the actual mechanical advantage equals the resistance divided by the: load mass friction effort 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. 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: shaft rack pinion 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. Your score is 0% Exit