Mechanical Comprehension – Test 3 0% 60 Time Expired This subtest has 16 questions and a time limit of 20 minutes 1 / 16 Pressure is the amount of force within a specific: tube area container fluid Pressure is the amount of force within a specific area. Pressure is the amount of force within a specific area. 2 / 16 When two external gears mesh, they always turn in what directions? upward same lower 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. 3 / 16 What is the benefit of using ball bearings or roller bearings in a machine? sliding friction is less than rolling friction metal is smoother than oil rolling friction is less than sliding 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. 4 / 16 An inclined plane permits you to overcome a large: fulcrum inertia friction resistance An inclined plane permits you to overcome a large resistance. An inclined plane permits you to overcome a large resistance. 5 / 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. 6 / 16 The Law of Conservation of Momentum states: momentum of an open system remains the same Momentum requires opposing forces total mass of a system remains the same 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. 7 / 16 In what type of system does mass remain constant and the net external force on the system is zero? closed sytem frozen system 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. 8 / 16 Equilibrium is achieved when the forces on a system are: balanced inverse net net hyperactive Equilibrium is achieved when the forces on a system are balanced. Equilibrium is achieved when the forces on a system are balanced. 9 / 16 What law does the force developed in a spring obey? Hooke's law Newton's 16th law of motion Law of Least Resistance 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 gears of unequal size are meshed together, the smaller of the two is usually called a: shaft rack flywheel 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. 11 / 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. 12 / 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 shaft 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. 13 / 16 A metric system of units means that values can be calculated by factors of: one 10 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. 14 / 16 In all machines, the actual mechanical advantage equals the resistance divided by the: mass load friction effort 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. 15 / 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. 16 / 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 torque axle rotation 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. Your score is 0% Exit