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 of an open system remains the same total mass of a system remains the same Momentum requires opposing forces 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. 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: 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. 4 / 16 What law does the force developed in a spring obey? Hamilton's law Law of Least Resistance Newton's 16th law of motion Hooke's law The force developed in a spring obeys Hooke's Law. The force developed in a spring obeys Hooke's Law. 5 / 16 When two external gears mesh, they always turn in what directions? upward opposite lower 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. 6 / 16 Third-class levers increase speed at the expense of: friction force speed mass Third-class levers increase speed at the expense of force. Third-class levers increase speed at the expense of force. 7 / 16 Pressure is the amount of force within a specific: area fluid container tube Pressure is the amount of force within a specific area. Pressure is the amount of force within a specific area. 8 / 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 mass work axle rotation 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. 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. 9 / 16 Pressure that is less than normal air pressure is called a: depression puncture vacuum 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. 10 / 16 A metric system of units means that values can be calculated by factors of: mass infinity 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. 11 / 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. 12 / 16 An inclined plane permits you to overcome a large: inertia resistance fulcrum friction An inclined plane permits you to overcome a large resistance. An inclined plane permits you to overcome a large resistance. 13 / 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. 14 / 16 What can used to change rotary motion into linear motion? miter cams worm drive bevel Cams can used to change rotary motion into linear motion. Cams can used to change rotary motion into linear motion. 15 / 16 What is the benefit of using ball bearings or roller bearings in a machine? rolling friction is less than sliding friction metal is smoother than oil sliding friction is less than rolling friction 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. 16 / 16 When two gears of unequal size are meshed together, the smaller of the two is usually called a: flywheel shaft 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. Your score is 0% Exit