Mechanical Comprehension – Test 3 0% 62 Time Expired This subtest has 16 questions and a time limit of 20 minutes 1 / 16 In all machines, the actual mechanical advantage equals the resistance divided by the: mass effort load 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. 2 / 16 The Law of Conservation of Momentum states: total momentum of a closed system cannot change momentum of an open system remains the same Momentum requires opposing forces 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 When two gears of unequal size (meaning an unequal number of teeth) are meshed together, the smaller of the two is usually called a: pinion rack 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. 4 / 16 In what type of system does mass remain constant and the net external force on the system is zero? elastic system frozen system balanced 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. 5 / 16 Equilibrium is achieved when the forces on a system are: hyperactive balanced 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. 6 / 16 Pressure is the amount of force within a specific: fluid area tube container Pressure is the amount of force within a specific area. Pressure is the amount of force within a specific area. 7 / 16 What law does the force developed in a spring obey? Law of Least Resistance Hamilton's law Hooke's law 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. 8 / 16 A metric system of units means that values can be calculated by factors of: 10 infinity 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 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. 10 / 16 What is the benefit of using ball bearings or roller bearings in a machine? greater mass equals more friction rolling friction is less than sliding 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. 11 / 16 When two external gears mesh, they always turn in what directions? same lower upward opposite When two external gears mesh, they always turn in the opposite directions. When two external gears mesh, they always turn in the opposite directions. 12 / 16 Pressure that is less than normal air pressure is called a: puncture leak depression 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. 13 / 16 What can used to change rotary motion into linear motion? bevel miter worm drive cams Cams can used to change rotary motion into linear motion. Cams can used to change rotary motion into linear motion. 14 / 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 mass work axle rotation torque 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. 15 / 16 Third-class levers increase speed at the expense of: mass friction force speed Third-class levers increase speed at the expense of force. Third-class levers increase speed at the expense of force. 16 / 16 An inclined plane permits you to overcome a large: resistance friction inertia fulcrum An inclined plane permits you to overcome a large resistance. An inclined plane permits you to overcome a large resistance. Your score is 0% Exit