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Elevator Physics Elevator Mechanics With Answers (126 Solved Questions)

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    Elevator mechanics exam 300 What's the equation for the volume of the cylinder? CORRECT ANSWERV (volume)= pi multiplied by R squared multiplied by the height Example: radius is 6" height is 30 V=3.1416•6•6•30 A 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•16.0 4.5•4.5=20.25 20.25•16.0=324 P=324 What is the equation for distance ? CORRECT ANSWERD=R•T D(distance=R(rate) multiplied by T(time) What is the equation for pressure? CORRECT ANSWERpressure = force/area P(pressure)= F(force) divided by A(area) What is the equation For voltage? CORRECT ANSWERE=I•R voltage (E) = current(I) x resistance(R) What is the equation for current or amps (i)? CORRECT ANSWERI=E/R i (current in Amps) R=(resistance in ohms) E(volts)

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    What is the equation for series voltage? CORRECT ANSWEREt=E1=E2=E3 ET(total voltage) What is the equation for series resistance? CORRECT ANSWERRt=R1+R2+R3 R=resistance What is the equation for series current? CORRECT ANSWERIt=i1=i2=i3 it=total current in amps I=current in amps How do you calculate resistance of a wire? CORRECT ANSWERR=P• L/A R=resistance of the wire P= resistivity constant of the wire L=length of the wire A=cross sectional area of the wire What is the equation for parallel voltage? CORRECT ANSWEREt=E1=E2=E3 E=voltage ET=total voltage What is the equation for parallel cu rrent? CORRECT ANSWERiT=i1+i2+i3 I=current in amps iT=total current in amps What is the equation for parallel resistance? CORRECT ANSWERRT= 1 divided by 1/R1 + 1/R2 +1/R3 Add 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 first pulley) (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 divid e that by the diameter of the second pulley. What is the equation for sprocket relationship ? CORRECT ANSWER(Number of teeth in sprocket1)•(RPM of sprocket 1)= (number of teeth in sprocket 2)•(RPM of sprocket 2) Take the number of teeth and multiply it b y the RPM, then divide it by the number of teeth in sprocket 2 What is the equation for leverage(lever principle)? CORRECT ANSWERF1D1=F2D2 F1=weight to be lifted D1=distance from pivot point F2=weight applies to end of fulcrum D2= distance from the pivot point where force is applied How many centimeters (CM) are in an inch? CORRECT ANSWERThere are 2.54 cm in one inch How 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 AN SWERThere are .0394 inches in a millimeter(MM) How many pounds are in a kilogram(KG)? CORRECT ANSWERThere are 2.20KG in one pound How many liters in a gallon? CORRECT ANSWER3.79L = 1 gallon How many liters are in a quart? CORRECT ANSWERThere are .95 lit ers in a quart

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    How many quarts in a liter? CORRECT ANSWER1.06 quarts are in a liter What is the square inches of 1 square foot? CORRECT ANSWER1 square foot= 144 inches squared What is the equation for area of a square? CORRECT ANSWERA=Bsquared Can a wet surface act as a conductor for electricity? CORRECT ANSWERYes, wet surfaces conduct electricity When using portable lights what must they be made of? CORRECT ANSWERThey must be made of non conductive material Does moisture increase the severity of electric shock? CORRECT ANSWERYes, moisture raises the severity of electrical shock What is a danger Of even a slight electrical shock? CORRECT ANSWERInjury due to involuntary movement following electrical shock. How can the third wire of an extensio n cord best be described? CORRECT ANSWERIt prevents the case or chassis of the supply device from becoming hot How does a ground fault detector protect a worker using a power tool? CORRECT ANSWERIt removes power if leakage current develops in the cord or a tool What should be done if a coworker is in contact with a live circuit? CORRECT ANSWERRemove power or safely remove the victim from the source of power What precautions should be taken when performing cleaning operations on elevator electrical equipm ent? CORRECT ANSWERRemove power and lockout and tag out What is the definition of voltage? CORRECT ANSWERA measure of electrical energy or pressure The potential difference between a "hot" and "neutral" lead

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