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: 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. 2 / 16 Pressure that is less than normal air pressure is called a: depression puncture leak 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 The Law of Conservation of Momentum states: Momentum requires opposing forces momentum of an open system remains the same total momentum of a closed system cannot change 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. 4 / 16 Equilibrium is achieved when the forces on a system are: inverse net net hyperactive balanced Equilibrium is achieved when the forces on a system are balanced. Equilibrium is achieved when the forces on a system are balanced. 5 / 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. 6 / 16 A metric system of units means that values can be calculated by factors of: 10 one infinity 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. 7 / 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: flywheel pinion shaft 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. 8 / 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. 9 / 16 An inclined plane permits you to overcome a large: friction resistance fulcrum inertia An inclined plane permits you to overcome a large resistance. An inclined plane permits you to overcome a large resistance. 10 / 16 In what type of system does mass remain constant and the net external force on the system is zero? frozen system balanced system elastic 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. 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: torque axle rotation mass work 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. 12 / 16 When two external gears mesh, they always turn in what directions? same upward opposite lower When two external gears mesh, they always turn in the opposite directions. When two external gears mesh, they always turn in the opposite directions. 13 / 16 What law does the force developed in a spring obey? Hooke's law Hamilton's law Newton's 16th law of motion Law of Least Resistance The force developed in a spring obeys Hooke's Law. The force developed in a spring obeys Hooke's Law. 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 Third-class levers increase speed at the expense of: mass speed friction force Third-class levers increase speed at the expense of force. Third-class levers increase speed at the expense of force. 16 / 16 In all machines, the actual mechanical advantage equals the resistance divided by the: friction effort load mass 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