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: friction effort mass load 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 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. 3 / 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. 4 / 16 In what type of system does mass remain constant and the net external force on the system is zero? closed sytem elastic system 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 What is the benefit of using ball bearings or roller bearings in a machine? metal is smoother than oil sliding friction is less than rolling friction greater mass equals more friction rolling friction is 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. The benefit of using ball bearings or roller bearings in a machine is that rolling friction is always less than sliding friction. 6 / 16 Pressure that is less than normal air pressure is called a: leak vacuum depression puncture Pressure that is less than normal air pressure is called a vacuum. Pressure that is less than normal air pressure is called a vacuum. 7 / 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 torque 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. 8 / 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. 9 / 16 A metric system of units means that values can be calculated by factors of: mass 10 one infinity 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. 10 / 16 What law does the force developed in a spring obey? Newton's 16th law of motion Law of Least Resistance Hooke's law Hamilton's law The force developed in a spring obeys Hooke's Law. The force developed in a spring obeys Hooke's Law. 11 / 16 The Law of Conservation of Momentum states: total mass of a system remains the same Momentum requires opposing forces total momentum of a closed system cannot change 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. 12 / 16 Equilibrium is achieved when the forces on a system are: hyperactive net net balanced 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 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. 14 / 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. 15 / 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. 16 / 16 What can used to change rotary motion into linear motion? worm drive cams bevel miter Cams can used to change rotary motion into linear motion. Cams can used to change rotary motion into linear motion. Your score is 0% Exit