Mechanical Comprehension – Test 3 0% 62 Time Expired This subtest has 16 questions and a time limit of 20 minutes 1 / 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. 2 / 16 When two external gears mesh, they always turn in what directions? opposite lower same 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. 3 / 16 When two gears of unequal size are meshed together, the smaller of the two is usually called a: shaft flywheel pinion 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. 4 / 16 A metric system of units means that values can be calculated by factors of: infinity mass one 10 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. 5 / 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. 6 / 16 The Law of Conservation of Momentum states: Momentum requires opposing forces total momentum of a closed system cannot change 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. 7 / 16 Pressure is the amount of force within a specific: tube container area fluid Pressure is the amount of force within a specific area. Pressure is the amount of force within a specific area. 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 An inclined plane permits you to overcome a large: fulcrum friction resistance inertia An inclined plane permits you to overcome a large resistance. An inclined plane permits you to overcome a large resistance. 10 / 16 What law does the force developed in a spring obey? Hooke's law Hamilton'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. 11 / 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: rotational work axle rotation torque 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. 12 / 16 Equilibrium is achieved when the forces on a system are: net net balanced hyperactive inverse Equilibrium is achieved when the forces on a system are balanced. Equilibrium is achieved when the forces on a system are balanced. 13 / 16 Third-class levers increase speed at the expense of: friction speed force mass Third-class levers increase speed at the expense of force. Third-class levers increase speed at the expense of force. 14 / 16 What is the benefit of using ball bearings or roller bearings in a machine? greater mass equals more friction sliding friction is less than rolling friction rolling friction is less than sliding friction metal is smoother than oil 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 When two gears of unequal size (meaning an unequal number of teeth) are meshed together, the smaller of the two is usually called a: rack shaft 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. 16 / 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. Your score is 0% Exit