MECHANICS M.E. EXAM: VERIFIED QUESTIONS AND
ANSWERS | 100% CORRECT | A GRADED – REVIEW
** An Mov Burns Out, You Replace It But Cannot Read Voltage Or Resistance. What Should You Do?
Accurate Ans>> Replace It With A Larger One (630)
* On A Ward-Leonard Circuit, The Brake Is Set But The Motor Is Trying To Slip Through The Brake. What
Circuit Is The Issue?
Accurate Ans>> Suicide Circuit (425)
** A Hydro Runs Up With No Load But Does Not Run Up With A Full Load. What Is The Issue?
Accurate Ans>> The Relief Valve Is Set Too Low (805)
** 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?
Accurate Ans>>
22" For 1:1.
For A 2:1 With The Same Issue Is 44".
** 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?
Accurate Ans>> Mainline Disconnect (535)
,** The Contractor Requests That The Vertical Center Of The Rack And Pinion Hoist Be Moved. How Is
This Accomplished?
Accurate Ans>> Adjust Tie Downs/Wall Ties (805)
** Working Pressure On A Hydro Is 400 Psi. What Is The Correct Relief Valve Setting?
Accurate Ans>>
600 Psi Max. (805)
400 Psi X 150% = 600 Psi
** A Contractor Wants To Raise The Car Speed From 100 Fpm To 125 Fpm. It Currently Has A 12"
Sheave. What Size Sheave Is Required?
Accurate Ans>>
15"
(125 /100 = 1.25 1.25 X 12 = 15)
** There Is Slight Arcing At The Brushes And Commutator. What Actions Must Be Taken?
Accurate Ans>>
None. (430)
"Heavy Arcing Is Due To Light Brush Pressure. Mechanical Wear Indicates Heavy Brush Pressure.
** How Much Resistance Is Normally Measured Across A Normally Closed Switch ?
Accurate Ans>> 1.2 Ohms Or 1 To 2 Ohms
** A Car Traveling In The Hoistway Always Stops At The Same Point And Blows A Fuse. What Is The
Problem?
Accurate Ans>> Traveling Cable Has A Cut Or Short
, ** How Is A Class 1 (Yearly) Buffer Test Performed?
Accurate Ans>>
At Slow Speed And The Buffer Must Return In 90 Seconds. (555) *(60 Seconds Is Acceptable) (90
Seconds Is Code)
5 Year Test (Class 5) Is Car At Rated Load And Speed. Buffer Must Return In 90 Seconds. Cwt At Rated
Speed And Buffer Must Return In 90 Seconds.
** How Many Strain Supports Are Required On A 350' Raceway?
Accurate Ans>>
4
One For Every 100'
** How Is Stainless Steel Drilled Out?
Accurate Ans>> Slow Speed And Constant Pressure (205)
** What Are The Required Amount Of Clips For Wedge Shackles And What Is Their Spacing?
Accurate Ans>>
At Least 2, With The First Being 4 Times The Diameter Of The Rope From The Top Of Shackle.
Second Is 8 Times The Diameter Of The Rope From The First.
** Car Is Loaded With 125% And Sinks. Why?
Accurate Ans>> Slipped Through The Brake.
ANSWERS | 100% CORRECT | A GRADED – REVIEW
** An Mov Burns Out, You Replace It But Cannot Read Voltage Or Resistance. What Should You Do?
Accurate Ans>> Replace It With A Larger One (630)
* On A Ward-Leonard Circuit, The Brake Is Set But The Motor Is Trying To Slip Through The Brake. What
Circuit Is The Issue?
Accurate Ans>> Suicide Circuit (425)
** A Hydro Runs Up With No Load But Does Not Run Up With A Full Load. What Is The Issue?
Accurate Ans>> The Relief Valve Is Set Too Low (805)
** 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?
Accurate Ans>>
22" For 1:1.
For A 2:1 With The Same Issue Is 44".
** 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?
Accurate Ans>> Mainline Disconnect (535)
,** The Contractor Requests That The Vertical Center Of The Rack And Pinion Hoist Be Moved. How Is
This Accomplished?
Accurate Ans>> Adjust Tie Downs/Wall Ties (805)
** Working Pressure On A Hydro Is 400 Psi. What Is The Correct Relief Valve Setting?
Accurate Ans>>
600 Psi Max. (805)
400 Psi X 150% = 600 Psi
** A Contractor Wants To Raise The Car Speed From 100 Fpm To 125 Fpm. It Currently Has A 12"
Sheave. What Size Sheave Is Required?
Accurate Ans>>
15"
(125 /100 = 1.25 1.25 X 12 = 15)
** There Is Slight Arcing At The Brushes And Commutator. What Actions Must Be Taken?
Accurate Ans>>
None. (430)
"Heavy Arcing Is Due To Light Brush Pressure. Mechanical Wear Indicates Heavy Brush Pressure.
** How Much Resistance Is Normally Measured Across A Normally Closed Switch ?
Accurate Ans>> 1.2 Ohms Or 1 To 2 Ohms
** A Car Traveling In The Hoistway Always Stops At The Same Point And Blows A Fuse. What Is The
Problem?
Accurate Ans>> Traveling Cable Has A Cut Or Short
, ** How Is A Class 1 (Yearly) Buffer Test Performed?
Accurate Ans>>
At Slow Speed And The Buffer Must Return In 90 Seconds. (555) *(60 Seconds Is Acceptable) (90
Seconds Is Code)
5 Year Test (Class 5) Is Car At Rated Load And Speed. Buffer Must Return In 90 Seconds. Cwt At Rated
Speed And Buffer Must Return In 90 Seconds.
** How Many Strain Supports Are Required On A 350' Raceway?
Accurate Ans>>
4
One For Every 100'
** How Is Stainless Steel Drilled Out?
Accurate Ans>> Slow Speed And Constant Pressure (205)
** What Are The Required Amount Of Clips For Wedge Shackles And What Is Their Spacing?
Accurate Ans>>
At Least 2, With The First Being 4 Times The Diameter Of The Rope From The Top Of Shackle.
Second Is 8 Times The Diameter Of The Rope From The First.
** Car Is Loaded With 125% And Sinks. Why?
Accurate Ans>> Slipped Through The Brake.
