SOS MECHANIC CERTIFICATION BRAKES
EXAM EXAMINATION TEST 2026
COMPLETE QUESTIONS AND SOLUTIONS
GRADED A+
⩥ ** Given a generator that runs at 600 rpm and has 4 Poles, what is the
output frequency? Answer: 600/60seconds = 10x2 = 20 HZ
⩥ ** If an Exclusive OR gate was connected to a NOR gate and attached
to a AND gate with a high out put, what must the input at the Exclusive
OR gate A and B be? Answer: Both must be high
⩥ ** Using Binary logic, what DIP switches need to be in the " On"
position of a 128 bit 30 second timer set for 150%? Answer: 1,3,4,6 = 45
⩥ ** How must a 9 lead 480/240 motor be wired for low voltage
setting? Answer: L1 (1,7). L2 (2,8). L3 (3,9). (4,5,6)
⩥ ** What does a square with a darkened upper triangle represent?
Answer: DC Relay
Square with lower triangle = Latching
Square with an Arrow through it = Timer
,⩥ ** The Step Level switch on an Escalator has been activated. Where
do you check? Answer: Both Top and Bottom (825)
Step switches are manual reset switches. They are activated if the step
drops 1/4" or more.
⩥ ** You get a trouble call for In-Op freight door. What must you do
first before you begin work? Answer: Block the door open.
⩥ ** You get shocked when you attempt to move a car using a Temp
button for the first time. Why? Answer: You forgot to hook up a ground.
(810)
⩥ * A motor needs a sleeve bearing replaced. What type of bearing will
you need? Answer: Friction Bearing (420)
⩥ ** With a 7' platform, your inside wall clearance is 6'8". What is the
thickness or take up of the walls? Answer: 2" thick.
⩥ ** You notice rouging on the Governor and Tail sheave. What should
you do? Answer: Check the rope diameter. (250)
⩥ ** Car doors are dragging on the sill. How high should the be raised
to be code compliant? Answer: 1/4"
, ⩥ ** What type of safeties will a 300 fpm car have? Answer: Wedge
Clamps
⩥ ** "Vertical" platform stopping devices? Answer: 2 Switches. 15lb
Max pressure.
⩥ ** What type of oil do you need for Sleeve Bearings? Answer: SAE
20/20W ( Single Viscosity Oil )
⩥ ** How do you test the safety circuit? Answer: You test all switches
Independently.
⩥ ** What is the maximum "Moving Walk" incline? Answer: 12
degrees. (830)
⩥ ** How does a GFCI work? Answer: It detects an Imbalance between
the Hot and Neutral wires.
⩥ ** Who is required to provide you with the MSDS or SDS of a
solvent you're using to clean rails? Answer: Your Employer (105)
⩥ ** How do Emergency Doors swing? Answer: Outward.
EXAM EXAMINATION TEST 2026
COMPLETE QUESTIONS AND SOLUTIONS
GRADED A+
⩥ ** Given a generator that runs at 600 rpm and has 4 Poles, what is the
output frequency? Answer: 600/60seconds = 10x2 = 20 HZ
⩥ ** If an Exclusive OR gate was connected to a NOR gate and attached
to a AND gate with a high out put, what must the input at the Exclusive
OR gate A and B be? Answer: Both must be high
⩥ ** Using Binary logic, what DIP switches need to be in the " On"
position of a 128 bit 30 second timer set for 150%? Answer: 1,3,4,6 = 45
⩥ ** How must a 9 lead 480/240 motor be wired for low voltage
setting? Answer: L1 (1,7). L2 (2,8). L3 (3,9). (4,5,6)
⩥ ** What does a square with a darkened upper triangle represent?
Answer: DC Relay
Square with lower triangle = Latching
Square with an Arrow through it = Timer
,⩥ ** The Step Level switch on an Escalator has been activated. Where
do you check? Answer: Both Top and Bottom (825)
Step switches are manual reset switches. They are activated if the step
drops 1/4" or more.
⩥ ** You get a trouble call for In-Op freight door. What must you do
first before you begin work? Answer: Block the door open.
⩥ ** You get shocked when you attempt to move a car using a Temp
button for the first time. Why? Answer: You forgot to hook up a ground.
(810)
⩥ * A motor needs a sleeve bearing replaced. What type of bearing will
you need? Answer: Friction Bearing (420)
⩥ ** With a 7' platform, your inside wall clearance is 6'8". What is the
thickness or take up of the walls? Answer: 2" thick.
⩥ ** You notice rouging on the Governor and Tail sheave. What should
you do? Answer: Check the rope diameter. (250)
⩥ ** Car doors are dragging on the sill. How high should the be raised
to be code compliant? Answer: 1/4"
, ⩥ ** What type of safeties will a 300 fpm car have? Answer: Wedge
Clamps
⩥ ** "Vertical" platform stopping devices? Answer: 2 Switches. 15lb
Max pressure.
⩥ ** What type of oil do you need for Sleeve Bearings? Answer: SAE
20/20W ( Single Viscosity Oil )
⩥ ** How do you test the safety circuit? Answer: You test all switches
Independently.
⩥ ** What is the maximum "Moving Walk" incline? Answer: 12
degrees. (830)
⩥ ** How does a GFCI work? Answer: It detects an Imbalance between
the Hot and Neutral wires.
⩥ ** Who is required to provide you with the MSDS or SDS of a
solvent you're using to clean rails? Answer: Your Employer (105)
⩥ ** How do Emergency Doors swing? Answer: Outward.
