Mechanical Comprehension – Test 3 0% 60 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 pinion 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. 2 / 16 What can used to change rotary motion into linear motion? bevel miter cams worm drive Cams can used to change rotary motion into linear motion. Cams can used to change rotary motion into linear motion. 3 / 16 Third-class levers increase speed at the expense of: friction force mass speed Third-class levers increase speed at the expense of force. Third-class levers increase speed at the expense of force. 4 / 16 In what type of system does mass remain constant and the net external force on the system is zero? elastic system closed sytem balanced system frozen 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. 5 / 16 When two external gears mesh, they always turn in what directions? upward same opposite lower When two external gears mesh, they always turn in the opposite directions. When two external gears mesh, they always turn in the opposite directions. 6 / 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 pinion flywheel rack 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. 7 / 16 Pressure that is less than normal air pressure is called a: vacuum leak puncture 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. 8 / 16 An inclined plane permits you to overcome a large: friction inertia fulcrum resistance An inclined plane permits you to overcome a large resistance. An inclined plane permits you to overcome a large resistance. 9 / 16 Equilibrium is achieved when the forces on a system are: hyperactive balanced net net inverse Equilibrium is achieved when the forces on a system are balanced. Equilibrium is achieved when the forces on a system are balanced. 10 / 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. 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 greater mass equals more friction metal is smoother than oil 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. 13 / 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. 14 / 16 In all machines, the actual mechanical advantage equals the resistance divided by the: friction load effort mass 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. 15 / 16 What law does the force developed in a spring obey? Newton's 16th law of motion Hooke's law 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. 16 / 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 rotational work axle rotation 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. Your score is 0% Exit