Mechanics(Elevator)
Exam/Updated/165 Questions
and Answers/Verified
** An MOV burns out, you replace it but cannot read voltage or
resistance. What should you do? - -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? - -Suicide circuit (425)
-** A Hydro runs up with no load but does not run up with a full load.
What is the issue? - -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? - -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? - -Mainline disconnect (535)
-** The contractor requests that the vertical center of the Rack and
Pinion hoist be moved. How is this accomplished? - -Adjust Tie
downs/Wall ties (805)
-** Working pressure on a Hydro is 400 PSI. What is the correct Relief
Valve Setting? - -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? - -15"
(125 /100 = 1.25 1.25 x 12 = 15)
-** There is slight arcing at the Brushes and Commutator. What actions
must be taken? - -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 ? - -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? - -Traveling cable has a cut or short
, -** How is a Class 1 (yearly) buffer test performed? - -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? - -4
One for every 100'
-** How is Stainless steel drilled out? - -Slow speed and constant
pressure (205)
-** What are the required amount of clips for Wedge Shackles and what
is their spacing? - -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? - -Slipped through the
brake.
-** A 300 Ohm resistor burns out. You don't have a 300 Ohm resistor to
replace it. What can you use to make up the resistor? - -2 600 Ohms
resistors in Parallel. "The resistance is half of the highest rating in a
parallel circuit.
3, 225 Ohm resistors in parallel equal 75 Ohms.
-** A 480 VAC Step Down Transformer is connected to a 3 phase
rectifier. What will the output be? - -320 VDC
480 - 33.33% = 320
-** If you find a broken or missing barricade, what do you do? - -Write
up a formal inspection request.
-** If a Dumbwaiter has 9 square feet in Area,
4 ' High and the rated Capacity is 13.9 lb/ft3, what is the total capacity?
- -500 lb/ft3.
"The area of a Dumbwaiter is 9 sq' max and is 4' High. Multiply that by
13.9.
9x4 = 36. 36 x 13.9 = 500
-** What are the consequences of a misaligned Rack and Pinion hoist
joint? - -Broken Gear Teeth (850) Motor not aligned.
-** You enter a Pit where toxic fumes are present. How do you proceed?
- -Follow proper procedures.
"Confined Space entry procedures are now guided by OSHA for pit
entry".
-** When changing a 1:1 car rated at 600 FPM and 2000 lb capacity to a
2:1, what will the new ratings be? - -300 FPM and 4000 lb capacity.
Exam/Updated/165 Questions
and Answers/Verified
** An MOV burns out, you replace it but cannot read voltage or
resistance. What should you do? - -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? - -Suicide circuit (425)
-** A Hydro runs up with no load but does not run up with a full load.
What is the issue? - -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? - -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? - -Mainline disconnect (535)
-** The contractor requests that the vertical center of the Rack and
Pinion hoist be moved. How is this accomplished? - -Adjust Tie
downs/Wall ties (805)
-** Working pressure on a Hydro is 400 PSI. What is the correct Relief
Valve Setting? - -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? - -15"
(125 /100 = 1.25 1.25 x 12 = 15)
-** There is slight arcing at the Brushes and Commutator. What actions
must be taken? - -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 ? - -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? - -Traveling cable has a cut or short
, -** How is a Class 1 (yearly) buffer test performed? - -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? - -4
One for every 100'
-** How is Stainless steel drilled out? - -Slow speed and constant
pressure (205)
-** What are the required amount of clips for Wedge Shackles and what
is their spacing? - -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? - -Slipped through the
brake.
-** A 300 Ohm resistor burns out. You don't have a 300 Ohm resistor to
replace it. What can you use to make up the resistor? - -2 600 Ohms
resistors in Parallel. "The resistance is half of the highest rating in a
parallel circuit.
3, 225 Ohm resistors in parallel equal 75 Ohms.
-** A 480 VAC Step Down Transformer is connected to a 3 phase
rectifier. What will the output be? - -320 VDC
480 - 33.33% = 320
-** If you find a broken or missing barricade, what do you do? - -Write
up a formal inspection request.
-** If a Dumbwaiter has 9 square feet in Area,
4 ' High and the rated Capacity is 13.9 lb/ft3, what is the total capacity?
- -500 lb/ft3.
"The area of a Dumbwaiter is 9 sq' max and is 4' High. Multiply that by
13.9.
9x4 = 36. 36 x 13.9 = 500
-** What are the consequences of a misaligned Rack and Pinion hoist
joint? - -Broken Gear Teeth (850) Motor not aligned.
-** You enter a Pit where toxic fumes are present. How do you proceed?
- -Follow proper procedures.
"Confined Space entry procedures are now guided by OSHA for pit
entry".
-** When changing a 1:1 car rated at 600 FPM and 2000 lb capacity to a
2:1, what will the new ratings be? - -300 FPM and 4000 lb capacity.
