Elevator Mechanics Exam Section 300/132 Questions with Correct Solutions

Elevator Mechanics Exam
Section 300/132 Questions with
Correct Solutions
What's the equation for the volume of the cylinder? - -V (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)? - -P=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? - -D=R•T
D(distance=R(rate) multiplied by T(time)

-What is the equation for pressure? - -pressure = force/area
P(pressure)= F(force) divided by A(area)

-What is the equation For voltage? - -E=I•R
voltage (E) = current(I) x resistance(R)

-What is the equation for current or amps (i)? - -I=E/R
i (current in Amps)
R=(resistance in ohms)
E(volts)

-What is the equation for series voltage? - -Et=E1=E2=E3
ET(total voltage)

-What is the equation for series resistance? - -Rt=R1+R2+R3
R=resistance

-What is the equation for series current? - -It=i1=i2=i3
it=total current in amps
I=current in amps

-How do you calculate resistance of a wire? - -R=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? - -Et=E1=E2=E3
E=voltage
ET=total voltage

-What is the equation for parallel current? - -iT=i1+i2+i3
I=current in amps
iT=total current in amps

-What is the equation for parallel resistance? - -RT= 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? - -(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 divide that by the diameter of the second pulley.

-What is the equation for sprocket relationship ? - -(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 by the RPM, then divide it by
the number of teeth in sprocket 2

-What is the equation for leverage(lever principle)? - -F1D1=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? - -There are 2.54 cm in
one inch

-How many centimeters (CM) are in a foot? - -There are 30.5 CM in a
foot (12")

-How many inches in a millimeter (MM)? - -There are .0394 inches in a
millimeter(MM)

-How many pounds are in a kilogram(KG)? - -There are 2.20KG in one
pound

-How many liters in a gallon? - -3.79L = 1 gallon

-How many liters are in a quart? - -There are .95 liters in a quart