Elevator Physics Elevator Mechanics With Answers (126 Solved Questions)

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Elevator mechanics exam 300What's the equation for the volume of the cylinder? CORRECT ANSWERV (volume)= pi multiplied by Rsquared multiplied by the heightExample: radius is 6" height is 30V=3.1416•6•6•30A drill draws a current (I) of 4.5 amps and resistance of 16.0 ohms, how do You find the power(watts)?CORRECT ANSWERP=I squared (amps) multipled by R(resistance)Example:P=4.5•4.5•16.04.5•4.5=20.2520.25•16.0=324P=324What is the equation for distance? CORRECT ANSWERD=R•TD(distance=R(rate) multiplied by T(time)What is the equation for pressure? CORRECT ANSWERpressure = force/areaP(pressure)= F(force) divided by A(area)What is the equation For voltage? CORRECT ANSWERE=I•Rvoltage (E) = current(I)x resistance(R)What is the equation for current or amps (i)? CORRECT ANSWERI=E/Ri (current in Amps)R=(resistance in ohms)E(volts)

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What is the equation for series voltage? CORRECT ANSWEREt=E1=E2=E3ET(total voltage)What is the equation for series resistance? CORRECT ANSWERRt=R1+R2+R3R=resistanceWhat is the equation for series current? CORRECT ANSWERIt=i1=i2=i3it=total current in ampsI=current in ampsHow do you calculate resistance of a wire? CORRECT ANSWERR=P•L/AR=resistance of the wireP= resistivity constant of the wireL=length of the wireA=cross sectional area of the wireWhat is the equation for parallel voltage? CORRECT ANSWEREt=E1=E2=E3E=voltageET=total voltageWhat is the equation for parallel current? CORRECT ANSWERiT=i1+i2+i3I=current in ampsiT=total current in ampsWhat is the equation for parallel resistance? CORRECT ANSWERRT= 1 divided by 1/R1 + 1/R2 +1/R3Add each fraction (1/R1-1/R3)Divide the answer of each resistance by 1****

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What is the equation for pulley relationship? CORRECT ANSWER(Diameter of First pulley) •(RPM of firstpulley) (diameter of second pulley) •(RPM of second pulley)Take RPM of the first pulley and multiply it by the diameter of the first pulley, then divide that by thediameter of the second pulley.What is the equation for sprocket relationship ? CORRECT ANSWER(Number of teeth insprocket1)•(RPM of sprocket 1)= (number of teeth in sprocket 2)•(RPM of sprocket 2)Take the number of teeth and multiply it by the RPM, then divide it by the number of teeth in sprocket 2What is the equation for leverage(lever principle)? CORRECT ANSWERF1D1=F2D2F1=weight to be liftedD1=distance from pivot pointF2=weight applies to end of fulcrumD2= distance from the pivotpoint where force is appliedHow many centimeters (CM) are in an inch? CORRECT ANSWERThere are 2.54 cm in one inchHow many centimeters (CM) are in a foot? CORRECT ANSWERThere are 30.5 CM in a foot (12")How many inches in a millimeter (MM)? CORRECT ANSWERThere are .0394 inches in a millimeter(MM)How many pounds are in a kilogram(KG)? CORRECT ANSWERThere are 2.20KG in one poundHow many liters in a gallon? CORRECT ANSWER3.79L = 1 gallonHow many liters are in a quart? CORRECT ANSWERThere are .95 liters in a quart

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How many quarts in a liter? CORRECT ANSWER1.06 quarts are in a literWhat is the square inches of 1 square foot? CORRECT ANSWER1 square foot= 144 inches squaredWhat is the equation for area of a square? CORRECT ANSWERA=BsquaredCan a wet surface act as a conductor for electricity? CORRECT ANSWERYes, wet surfaces conductelectricityWhen using portable lights what must they be made of? CORRECT ANSWERThey must be made of nonconductive materialDoes moisture increase the severityof electric shock? CORRECT ANSWERYes, moisture raises theseverity of electrical shockWhat is a danger Of even a slight electrical shock? CORRECT ANSWERInjury due to involuntarymovement following electrical shock.How can the third wire of an extension cord best be described? CORRECT ANSWERIt prevents the caseor chassis of the supply device from becoming hotHow does a ground fault detector protect a worker using a power tool? CORRECT ANSWERIt removespower if leakage current develops in the cord ora toolWhat should be done if a coworker is in contact with a live circuit? CORRECT ANSWERRemove power orsafely remove the victim from the source of powerWhat precautions should be taken when performing cleaning operations on elevator electricalequipment? CORRECT ANSWERRemove power and lockout and tag outWhat is the definition of voltage? CORRECT ANSWERA measure of electrical energy or pressure Thepotential difference between a "hot" and "neutral" lead

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