SOS Mechanic Exam – Questions With Step By Step
Solutions
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Practice questions for this set
Learn 1/6 Study using Learn
Finished Face of the material should face the cutting edge of the tool. (255). The
blade has a tendency to burr the backside.
Choose an answer
* When cutting Laminated Panels, ** An MOV burns out, you replace it
1 which direction should the finished 2 but cannot read voltage or resistance.
side face? What should you do?
** You need to work on a freight door
** How many Strain Supports are retiring cam. You LOTO the mainline
3 4
required on a 350' raceway? disconnect but there is still power to
the cam. What circuit is still hot?
Don't know?
Terms in this set (165)
** An MOV burns out, you replace it Replace it with a larger one (630)
but cannot read voltage or resistance.
What should you do?
,* On a Ward-Leonard circuit, the brake Suicide circuit (425)
is set but the motor is trying to slip
through the brake. What circuit is the
issue?
** A Hydro runs up with no load but The relief valve is set too low (805)
does not run up with a full load. What
is the issue?
** Runby for a 1:1 car hits the CWT 22" for 1:1.
buffer 4" below the top landing. The For a 2:1 with the same issue is 44".
CWT runby should be set at 18". How
much should the ropes be shortened?
** You need to work on a freight door Mainline disconnect (535)
retiring cam. You LOTO the mainline
disconnect but there is still power to
the cam. What circuit is still hot?
** The contractor requests that the Adjust Tie downs/Wall ties (805)
vertical center of the Rack and Pinion
hoist be moved. How is this
accomplished?
** Working pressure on a Hydro is 400 600 PSI Max. (805)
PSI. What is the correct Relief Valve 400 psi x 150% = 600 psi
Setting?
** A contractor wants to raise the car 15"
speed from 100 FPM to 125 FPM. It (125 /100 = 1.25 1.25 x 12 = 15)
currently has a 12" sheave. What size
sheave is required?
** There is slight arcing at the Brushes None. (430)
and Commutator. What actions must "Heavy arcing is due to light brush pressure.
be taken? Mechanical wear indicates heavy brush pressure.
, ** How much resistance is normally 1.2 ohms or 1 to 2 ohms
measured across a normally closed
switch ?
** A car traveling in the hoistway Traveling cable has a cut or short
always stops at the same point and
blows a fuse. What is the problem?
** How is a Class 1 (yearly) buffer test At slow speed and the buffer must return in 90
performed? 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 4
required on a 350' raceway? One for every 100'
** How is Stainless steel drilled out? Slow speed and constant pressure (205)
** What are the required amount of At least 2, with the first being 4 times the diameter of
clips for Wedge Shackles and what is the rope from the top of shackle.
their spacing? Second is 8 times the diameter of the rope from the
first.
** Car is loaded with 125% and sinks. Slipped through the brake.
Why?
** A 300 Ohm resistor burns out. You 2 600 Ohms resistors in Parallel. "The resistance is
don't have a 300 Ohm resistor to half of the highest rating in a parallel circuit.
replace it. What can you use to make 3, 225 Ohm resistors in parallel equal 75 Ohms.
up the resistor?
** A 480 VAC Step Down Transformer 320 VDC
is connected to a 3 phase rectifier. 480 - 33.33% = 320
What will the output be?
** If you find a broken or missing Write up a formal inspection request.
barricade, what do you do?
Solutions
Save
Practice questions for this set
Learn 1/6 Study using Learn
Finished Face of the material should face the cutting edge of the tool. (255). The
blade has a tendency to burr the backside.
Choose an answer
* When cutting Laminated Panels, ** An MOV burns out, you replace it
1 which direction should the finished 2 but cannot read voltage or resistance.
side face? What should you do?
** You need to work on a freight door
** How many Strain Supports are retiring cam. You LOTO the mainline
3 4
required on a 350' raceway? disconnect but there is still power to
the cam. What circuit is still hot?
Don't know?
Terms in this set (165)
** An MOV burns out, you replace it Replace it with a larger one (630)
but cannot read voltage or resistance.
What should you do?
,* On a Ward-Leonard circuit, the brake Suicide circuit (425)
is set but the motor is trying to slip
through the brake. What circuit is the
issue?
** A Hydro runs up with no load but The relief valve is set too low (805)
does not run up with a full load. What
is the issue?
** Runby for a 1:1 car hits the CWT 22" for 1:1.
buffer 4" below the top landing. The For a 2:1 with the same issue is 44".
CWT runby should be set at 18". How
much should the ropes be shortened?
** You need to work on a freight door Mainline disconnect (535)
retiring cam. You LOTO the mainline
disconnect but there is still power to
the cam. What circuit is still hot?
** The contractor requests that the Adjust Tie downs/Wall ties (805)
vertical center of the Rack and Pinion
hoist be moved. How is this
accomplished?
** Working pressure on a Hydro is 400 600 PSI Max. (805)
PSI. What is the correct Relief Valve 400 psi x 150% = 600 psi
Setting?
** A contractor wants to raise the car 15"
speed from 100 FPM to 125 FPM. It (125 /100 = 1.25 1.25 x 12 = 15)
currently has a 12" sheave. What size
sheave is required?
** There is slight arcing at the Brushes None. (430)
and Commutator. What actions must "Heavy arcing is due to light brush pressure.
be taken? Mechanical wear indicates heavy brush pressure.
, ** How much resistance is normally 1.2 ohms or 1 to 2 ohms
measured across a normally closed
switch ?
** A car traveling in the hoistway Traveling cable has a cut or short
always stops at the same point and
blows a fuse. What is the problem?
** How is a Class 1 (yearly) buffer test At slow speed and the buffer must return in 90
performed? 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 4
required on a 350' raceway? One for every 100'
** How is Stainless steel drilled out? Slow speed and constant pressure (205)
** What are the required amount of At least 2, with the first being 4 times the diameter of
clips for Wedge Shackles and what is the rope from the top of shackle.
their spacing? Second is 8 times the diameter of the rope from the
first.
** Car is loaded with 125% and sinks. Slipped through the brake.
Why?
** A 300 Ohm resistor burns out. You 2 600 Ohms resistors in Parallel. "The resistance is
don't have a 300 Ohm resistor to half of the highest rating in a parallel circuit.
replace it. What can you use to make 3, 225 Ohm resistors in parallel equal 75 Ohms.
up the resistor?
** A 480 VAC Step Down Transformer 320 VDC
is connected to a 3 phase rectifier. 480 - 33.33% = 320
What will the output be?
** If you find a broken or missing Write up a formal inspection request.
barricade, what do you do?
