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: 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. 2 / 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. 3 / 16 Equilibrium is achieved when the forces on a system are: hyperactive balanced 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. 4 / 16 When two external gears mesh, they always turn in what directions? opposite upward same 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. 5 / 16 In what type of system does mass remain constant and the net external force on the system is zero? balanced system frozen 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. 6 / 16 When two gears of unequal size are meshed together, the smaller of the two is usually called a: rack flywheel pinion 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. 7 / 16 Third-class levers increase speed at the expense of: speed friction mass force Third-class levers increase speed at the expense of force. Third-class levers increase speed at the expense of force. 8 / 16 What is the benefit of using ball bearings or roller bearings in a machine? metal is smoother than oil rolling friction is less than sliding friction greater mass equals more friction sliding friction is less than rolling 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. 9 / 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. 10 / 16 A metric system of units means that values can be calculated by factors of: mass one 10 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. 11 / 16 What law does the force developed in a spring obey? Hamilton's law Law of Least Resistance Hooke's law Newton's 16th law of motion The force developed in a spring obeys Hooke's Law. The force developed in a spring obeys Hooke's Law. 12 / 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 of an open system remains the same 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. 13 / 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. 14 / 16 Pressure is the amount of force within a specific: container tube fluid area Pressure is the amount of force within a specific area. Pressure is the amount of force within a specific area. 15 / 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 rotational work mass work 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. 16 / 16 In all machines, the actual mechanical advantage equals the resistance divided by the: mass friction load 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. Your score is 0% Exit