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 (meaning an unequal number of teeth) are meshed together, the smaller of the two is usually called a: flywheel rack shaft 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. 2 / 16 When two external gears mesh, they always turn in what directions? opposite upward 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. 3 / 16 In all machines, the actual mechanical advantage equals the resistance divided by the: friction load effort 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. 4 / 16 Equilibrium is achieved when the forces on a system are: balanced hyperactive net net inverse Equilibrium is achieved when the forces on a system are balanced. Equilibrium is achieved when the forces on a system are balanced. 5 / 16 An inclined plane permits you to overcome a large: inertia resistance friction fulcrum An inclined plane permits you to overcome a large resistance. An inclined plane permits you to overcome a large resistance. 6 / 16 Pressure that is less than normal air pressure is called a: leak puncture vacuum depression 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 When two gears of unequal size are meshed together, the smaller of the two is usually called a: pinion shaft 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. 8 / 16 Pressure is the amount of force within a specific: fluid area tube container Pressure is the amount of force within a specific area. Pressure is the amount of force within a specific area. 9 / 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: mass work axle rotation rotational work torque 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. 10 / 16 What is the benefit of using ball bearings or roller bearings in a machine? greater mass equals more friction rolling friction is less than sliding friction sliding friction is less than rolling friction metal is smoother than oil 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. 11 / 16 A metric system of units means that values can be calculated by factors of: infinity mass 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. 12 / 16 Third-class levers increase speed at the expense of: speed force friction mass Third-class levers increase speed at the expense of force. Third-class levers increase speed at the expense of force. 13 / 16 In what type of system does mass remain constant and the net external force on the system is zero? elastic system closed sytem frozen system balanced 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. 14 / 16 The Law of Conservation of Momentum states: total mass of a system remains the same momentum of an open system remains the same total momentum of a closed system cannot change Momentum requires opposing forces 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. 15 / 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. 16 / 16 What can used to change rotary motion into linear motion? cams bevel miter worm drive 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