MSSC CPT MAINTENANCE AWARENESS PRE-QUIZ 2 WITH 100% CORRECT ANSWERS.

The 3 types of shafts to adjacent shaft power transmissions are _______ belt drive -- chain drive -- gear drive The proper place to lock out an electrical control system is at the__________ disconnect switch To _______________ workers should ALWAYS interrupt the power at the motor disconnect. perform lockout/tagout What agency suggests that a worker inspect and test all equipment, assuming all to be energized until proven energized? OSHA ____________ may remove a lockout on the power source of a piece of mechanical equipment only the person who installed the lockout Three types of loads placed on bearings are _______, ________ and ________. radial, thrust, combination A ______ bearing has inner and outer races that allow it to carry heavier axial loads than a standard ball bearing. angular contact Heavy axial loads are better handled by __________. angular contact bearings A shaft coupling may be out of round if dial indicator shows ___________. any movement High temperature can ___________ of a bearing. limit life Leveling all machine components prior to coupling them ________. reduces the number of needed shims Motor shaft runout is checked to make sure of proper _____________. alignment of mating components The coupling provides a secure method of transmitting _________ from one shaft to another. torque and speed ___________ coupling are used to act as a safety device if torque overload occurs clutch The ADVANTAGE of the flexible jaw coupling is that it _________ than most coupling methods. allows more misalignment Before installing a flexible coupling you should check for ______________ run out A common sign of a misaligned coupling is ____________ excessive vibration The two major types of misalignment that are corrected by shaft alignment are ___________ angular and parallel Before adjusting motor position during a shaft alignment always make sure to remove the ____________ dial indicator Feeler gauge , Rulers, Height gauges and Dial indicators are commonly used for which task? Alignment of industrial machines The 3 components for a belt drive system are belt , drive sheave , driven sheave A belt drive having a 12 inch pulley and a 6 inch drive pulley has a pulley ratio of ___________ 0.5 The V-belt should ride ________ in the groove with its top near the top of the sheave : the V- belt does NOT touch the ___________ of the sheave high, bottom A _____ should be used to check for sheave groove wear. sheave gauge The maximum allowable deflection force on a belt is _________ than the minimum deflection force. 50% greater The most basic way to test the tension of a belt is to use __________ your sense of touch The 3 basic components of a chain drive system are ___________ chain , driver sprocket , driven sprocket The sprocket ratio for a chain drive system having a driving sprocket with 54 teeth and a driver sprocket with 18 teeth is ____________ 3 A chain drive system has a driver sprocket with 24 teeth and a driven sprocket with 72 teeth. If the driver shaft has 633 ft-lds torque, the torque on the drive shaft will be ____________ 1899 ft-lbs Because of its design, an offset chain does not require a connecting link. For this reason, it is normally used in ______________ heavy load and low speed applications Compared to a V-belt drive, a chain drive __________. is more efficient Chain sag is measured by rotating the sprockets so there is little or NO chain sag in the ________ side and measuring the sag in the __________ side taut , slack Too little play is the most frequent cause of breakdown in what type of machine component? Chain drive A chain should be replaced when its length becomes ____________ longer than the original length. 3% A special link used to reconnect a chain is called a ________ link. master Devices called ____________ often serve as the brains of an automated machine. relays