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: balanced hyperactive inverse net net Equilibrium is achieved when the forces on a system are balanced. Equilibrium is achieved when the forces on a system are balanced. 2 / 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. 3 / 16 An inclined plane permits you to overcome a large: friction resistance inertia fulcrum An inclined plane permits you to overcome a large resistance. An inclined plane permits you to overcome a large resistance. 4 / 16 The Law of Conservation of Momentum states: total momentum of a closed system cannot change Momentum requires opposing forces total mass of a system remains the same momentum of an open 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. 5 / 16 Pressure that is less than normal air pressure is called a: puncture leak vacuum depression 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 When two external gears mesh, they always turn in what directions? upward lower opposite 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. 7 / 16 Third-class levers increase speed at the expense of: friction speed mass force Third-class levers increase speed at the expense of force. Third-class levers increase speed at the expense of force. 8 / 16 A metric system of units means that values can be calculated by factors of: infinity 10 one 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. 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 rotational 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. 10 / 16 What can used to change rotary motion into linear motion? bevel cams worm drive miter Cams can used to change rotary motion into linear motion. Cams can used to change rotary motion into linear motion. 11 / 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 flywheel 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. 12 / 16 Pressure is the amount of force within a specific: tube area container fluid Pressure is the amount of force within a specific area. Pressure is the amount of force within a specific area. 13 / 16 In all machines, the actual mechanical advantage equals the resistance divided by the: friction mass load 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. 14 / 16 In what type of system does mass remain constant and the net external force on the system is zero? elastic system balanced system frozen 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. 15 / 16 What law does the force developed in a spring obey? Hamilton's law Hooke's law Law of Least Resistance 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. 16 / 16 What is the benefit of using ball bearings or roller bearings in a machine? sliding friction is less than rolling friction rolling friction is less than sliding friction metal is smoother than oil 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. Your score is 0% Exit