Mechanic Exam Questions and Answers
(Verified Answers by Expert)
E=__ .- .(correct .answer) .-IR
P=__ .- .(correct .answer) .-IE
Pie .r^2 .= .- .(correct .answer) .-Area .of .a .circle
231 .in^3 ./____ .- .(correct .answer) .-gal.
25.4mm/__ .- .(correct .answer) .-in.
2.2kg/ .- .(correct .answer) .-lb
3 .phase .rectifier .output .= .- .(correct .answer) .-1.33 .x .input
single .phase .output .= .- .(correct .answer) .-0.9 .x .input
RMS .(effective .voltage) .= .- .(correct .answer) .-0.707 .(PEAK .V)
TC .= .- .(correct .answer) .-R .x .C .(5)???
RPM .= .- .(correct .answer) .-60 .(frequency) ./ .(poles/2)
door .overlap .minimum .= .- .(correct .answer) .-5/8" .min
door .gaps .maximum .= .- .(correct .answer) .-3/8" .max
Gibs .minimum .= .- .(correct .answer) .-1/4" .min
Gate .Switch .maximum .= .- .(correct .answer) .-2"
Passenger .Sill .to .Sill .____ .to .______" .- .(correct .answer) .-1/2 .to .1-1/2"
Platform .Lift .Sill .____ .to ._____" .- .(correct .answer) .-3/8" .to .3/4"
, Moving .Walk .maximum .= .- .(correct .answer) .-12 .degree .max
Governors .(Car .Trip .Speed .=______ .& .Overspeed .Switch .=______) .- .(correct .answer) .-
Car .trip .speed .15-20% .greater .than .contract .speed. .
Overspeed .Switch .less .than .or .equal .to .90-95% .of .trip .speed
CWT .(____%) .- .(correct .answer) .-Up .to .10% .greater .than .car .trip .speed
1) .A .contractor .wants .to .raise .the .car .speed .from .100FPM .to .125FPM. .It .currently .has .a .12" .sheave
. .What .size .sheave .is .required? .- .(correct .answer) .-15"
----Diam .= .12, .12"/4=3, .25FPM=3in .: .100FPM .+ .25FPM .= .12"+3" .=15"
2) .An .MOV .
(metal .oxide .varistor) .burns .out. .You .should .replace .it, .but .cannot .read .the .Voltage .or .resistance. .
What .should .you .do? .- .(correct .answer) .-Replace .it .with .a .larger .MOV. .(630)
3) .On .a .Ward-
Leonard .circuit, .the .brake .is .set, .but .the .motor .is .trying .to .slip .through .the .break. .What .circuit .is .th
e .issue? .- .(correct .answer) .-Suicide .Circuit. .(425)
4) .You .have .an .old .DC .motor .and .you .are .adding .an .SCR .Drive. .What .do .you .do .with .the .interpoles
? .- .(correct .answer) .-Leave .the .interpoles .alone. .(425). .
NOTE: .When .adding .the .SCR .Drive .to .the .generator, .the .series .loop .is .removed, .as .are .the .3 .resisto
rs. .Everything .else .stays .the .same.
5) .A .hydro .runs .up .with .no .load, .but .does .not .run .up .with .a .full .load. .What .is .the .issue? .- .
(correct .answer) .-The .relief .valve .is .set .too .low. .(805).
6) .Runby .for .a .1:1 .car .hits .the .CWT .buffer .4" .below .the .top .landing. .The .CWT .runby .should .be .set .
at .18". .How .much .should .the .ropes .be .shortened? .- .(correct .answer) .-
22" .and .for .a .2:1 .with .the .same .issue .--> .44"
7) .You .need .to .work .on .a .freight .door .retiring .cam. .You .LOTO .the .mainline .disconnect, .but .there .is
.still .power .to .the .cam. .What .circuit .is .still .hot? .- .(correct .answer) .-Mainline .disconnect. .(535) .
(3.2.6)
8) .The .contractor .requests .that .the .vertical .center .of .the .rack .and .pinion .hoist .be .moved. .How .is .th
is .accomplished? .- .(correct .answer) .-Adjust .tie .downs/ .wall .ties .(850).
(Verified Answers by Expert)
E=__ .- .(correct .answer) .-IR
P=__ .- .(correct .answer) .-IE
Pie .r^2 .= .- .(correct .answer) .-Area .of .a .circle
231 .in^3 ./____ .- .(correct .answer) .-gal.
25.4mm/__ .- .(correct .answer) .-in.
2.2kg/ .- .(correct .answer) .-lb
3 .phase .rectifier .output .= .- .(correct .answer) .-1.33 .x .input
single .phase .output .= .- .(correct .answer) .-0.9 .x .input
RMS .(effective .voltage) .= .- .(correct .answer) .-0.707 .(PEAK .V)
TC .= .- .(correct .answer) .-R .x .C .(5)???
RPM .= .- .(correct .answer) .-60 .(frequency) ./ .(poles/2)
door .overlap .minimum .= .- .(correct .answer) .-5/8" .min
door .gaps .maximum .= .- .(correct .answer) .-3/8" .max
Gibs .minimum .= .- .(correct .answer) .-1/4" .min
Gate .Switch .maximum .= .- .(correct .answer) .-2"
Passenger .Sill .to .Sill .____ .to .______" .- .(correct .answer) .-1/2 .to .1-1/2"
Platform .Lift .Sill .____ .to ._____" .- .(correct .answer) .-3/8" .to .3/4"
, Moving .Walk .maximum .= .- .(correct .answer) .-12 .degree .max
Governors .(Car .Trip .Speed .=______ .& .Overspeed .Switch .=______) .- .(correct .answer) .-
Car .trip .speed .15-20% .greater .than .contract .speed. .
Overspeed .Switch .less .than .or .equal .to .90-95% .of .trip .speed
CWT .(____%) .- .(correct .answer) .-Up .to .10% .greater .than .car .trip .speed
1) .A .contractor .wants .to .raise .the .car .speed .from .100FPM .to .125FPM. .It .currently .has .a .12" .sheave
. .What .size .sheave .is .required? .- .(correct .answer) .-15"
----Diam .= .12, .12"/4=3, .25FPM=3in .: .100FPM .+ .25FPM .= .12"+3" .=15"
2) .An .MOV .
(metal .oxide .varistor) .burns .out. .You .should .replace .it, .but .cannot .read .the .Voltage .or .resistance. .
What .should .you .do? .- .(correct .answer) .-Replace .it .with .a .larger .MOV. .(630)
3) .On .a .Ward-
Leonard .circuit, .the .brake .is .set, .but .the .motor .is .trying .to .slip .through .the .break. .What .circuit .is .th
e .issue? .- .(correct .answer) .-Suicide .Circuit. .(425)
4) .You .have .an .old .DC .motor .and .you .are .adding .an .SCR .Drive. .What .do .you .do .with .the .interpoles
? .- .(correct .answer) .-Leave .the .interpoles .alone. .(425). .
NOTE: .When .adding .the .SCR .Drive .to .the .generator, .the .series .loop .is .removed, .as .are .the .3 .resisto
rs. .Everything .else .stays .the .same.
5) .A .hydro .runs .up .with .no .load, .but .does .not .run .up .with .a .full .load. .What .is .the .issue? .- .
(correct .answer) .-The .relief .valve .is .set .too .low. .(805).
6) .Runby .for .a .1:1 .car .hits .the .CWT .buffer .4" .below .the .top .landing. .The .CWT .runby .should .be .set .
at .18". .How .much .should .the .ropes .be .shortened? .- .(correct .answer) .-
22" .and .for .a .2:1 .with .the .same .issue .--> .44"
7) .You .need .to .work .on .a .freight .door .retiring .cam. .You .LOTO .the .mainline .disconnect, .but .there .is
.still .power .to .the .cam. .What .circuit .is .still .hot? .- .(correct .answer) .-Mainline .disconnect. .(535) .
(3.2.6)
8) .The .contractor .requests .that .the .vertical .center .of .the .rack .and .pinion .hoist .be .moved. .How .is .th
is .accomplished? .- .(correct .answer) .-Adjust .tie .downs/ .wall .ties .(850).
