Mechanical Comprehension – Test 3 0% 62 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: 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. 2 / 16 Pressure that is less than normal air pressure is called a: depression leak puncture 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. 3 / 16 In all machines, the actual mechanical advantage equals the resistance divided by the: load effort 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. 4 / 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 metal is smoother than oil 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. 5 / 16 An inclined plane permits you to overcome a large: resistance inertia friction fulcrum An inclined plane permits you to overcome a large resistance. An inclined plane permits you to overcome a large resistance. 6 / 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: axle rotation rotational work 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. 7 / 16 The Law of Conservation of Momentum states: total momentum of a closed system cannot change total mass of a system remains the same Momentum requires opposing forces 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. 8 / 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. 9 / 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. 10 / 16 When two external gears mesh, they always turn in what directions? lower opposite upward 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. 11 / 16 What can used to change rotary motion into linear motion? miter worm drive bevel cams Cams can used to change rotary motion into linear motion. Cams can used to change rotary motion into linear motion. 12 / 16 Pressure is the amount of force within a specific: tube container fluid area Pressure is the amount of force within a specific area. Pressure is the amount of force within a specific area. 13 / 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 rack flywheel 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: speed force mass friction Third-class levers increase speed at the expense of force. Third-class levers increase speed at the expense of force. 15 / 16 Equilibrium is achieved when the forces on a system are: net net hyperactive inverse balanced Equilibrium is achieved when the forces on a system are balanced. Equilibrium is achieved when the forces on a system are balanced. 16 / 16 In what type of system does mass remain constant and the net external force on the system is zero? frozen system closed sytem balanced system elastic 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. Your score is 0% Exit