Mechanical Comprehension – Test 3 0% 62 Time Expired This subtest has 16 questions and a time limit of 20 minutes 1 / 16 Equilibrium is achieved when the forces on a system are: inverse hyperactive 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. 2 / 16 The Law of Conservation of Momentum states: Momentum requires opposing forces momentum of an open system remains the same total momentum of a closed system cannot change total mass of a 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. 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 torque 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. 4 / 16 When two external gears mesh, they always turn in what directions? same lower opposite upward When two external gears mesh, they always turn in the opposite directions. When two external gears mesh, they always turn in the opposite directions. 5 / 16 Pressure that is less than normal air pressure is called a: leak depression vacuum puncture Pressure that is less than normal air pressure is called a vacuum. Pressure that is less than normal air pressure is called a vacuum. 6 / 16 In all machines, the actual mechanical advantage equals the resistance divided by the: load mass effort 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 When two gears of unequal size 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. 8 / 16 In what type of system does mass remain constant and the net external force on the system is zero? elastic system frozen system closed sytem 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. 9 / 16 A metric system of units means that values can be calculated by factors of: infinity mass 10 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. 10 / 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. 11 / 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. 12 / 16 What can used to change rotary motion into linear motion? bevel worm drive cams miter Cams can used to change rotary motion into linear motion. Cams can used to change rotary motion into linear motion. 13 / 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. 14 / 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. 15 / 16 Third-class levers increase speed at the expense of: force mass friction speed Third-class levers increase speed at the expense of force. Third-class levers increase speed at the expense of force. 16 / 16 What law does the force developed in a spring obey? Hooke's law Newton's 16th law of motion Hamilton's law Law of Least Resistance The force developed in a spring obeys Hooke's Law. The force developed in a spring obeys Hooke's Law. Your score is 0% Exit