Mike's Ultimate Elevator Mechanics Exam Review 2024 Solved 100% Correct Already Graded A
17 views 0 purchase
Course
Mike\'s Ultimate Elevator Mechanics
Institution
Mike\'s Ultimate Elevator Mechanics
Mike's Ultimate Elevator Mechanics Exam Review 2024 Solved
100% Correct Already Graded A
1. A contractor wants to raise the car speed from 100fpm to 125fpm, it currently has a
12" sheave. What sheave is required? - ANSWER>>100fpm / 125fpm = 12" / X= 15"
2. A MOV (Metal Oxide Varistor) bur...
Mike's Ultimate Elevator Mechanics Exam Review 2024 Solved
100% Correct Already Graded A
1. A contractor wants to raise the car speed from 100fpm to 125fpm, it currently has a
12" sheave. What sheave is required? - ANSWER>>100fpm / 125fpm = 12" / X= 15"
2. A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or
resistance. What should you do? - ANSWER>>Replace it with a larger MOV 630
3. On a Ward-Leonard circuit the break is set, but the motor is trying to slip through
the break. What is the issue? - ANSWER>>Suicide Circuit 425
4. You have an old DC motor and are adding an SCR drive, what do you do to the
interpoles? - ANSWER>>Leave the interpoles alone. When adding a SCR drive to the
generator, the series loop is removed, as are the 3 resistors. Everything else remains
the same.
5. A hydro runs up with no load, but will not run with a full load. What is the issue? -
ANSWER>>The relief valve is set too low 815
6. Runby for a 1:1 hits the CWT buffer 4" below the top landing. CWT runby should be set
at 18". How much should the ropes be shortened? - ANSWER>>22" 235
7. You need to work on a freight door retiring cam, you LOTO the main line but there is
still power on the cam. What circuit is still hot? - ANSWER>>Door Operator Disconnect/
Main Line Disconnect 535
8. The contractor requests that the vertical center of a Rack and Pinion hoist be moved.
How do you do this? - ANSWER>>Adjust Tie Downs and Wall Ties 850
9. Working pressure on a Hydro is 400psi. What is the maximum relief valve setting? -
ANSWER>>400psi x 150%= 600psi 815
,10. What must be installed on a false car before operation? - ANSWER>>Spring Loaded
Safeties 110
11. There is slight arcing between the brush and commutator. What action must be
taken? - ANSWER>>None
Note: Heavy arcing=Light brush pressure, Heavy bush pressure=mechanical wear 430
12. If rigging gear is roped 3:1 and a BEAM CLAMP is used to lift a 6,000lb load. What is
the beam capacity requirement? - ANSWER>>18,000lbs.
Note: Beam capacity is cut in half with use of clamp, when rigging all blocks, rope, and
clamps will be Equal to the lowest load rating 210
13. How much resistance is measured over a normally closed switch? -
ANSWER>>1.2ohms. should be zero, but will never be that low
14. A car traveling in the hoistway always stops at the same spot and blows a fuse.
What causes this - ANSWER>>Traveling cable has a cut/exposed wire or a short 515
15. How is a class 1 yearly buffer test preformed? - ANSWER>>Car at bottom landing
and on inspection, jump out direction and final limits.
With pit clear, run down to compress buffers, buffers should fully extend within 90
seconds.
Note: 5yr: Full load Full speed CWT: Full speed Empty 555 (may be 60 on test)
16. How many strain supports are required on a 350ft raceway? - ANSWER>>4. 1 every
100ft 505-510
17) How is stainless steel drilled out? - ANSWER>>Slow speed and constant pressure
205
, 18. What is the required amount of retainer clips for wedge shackles and what is the
spacing? - ANSWER>>At least 2. First clip being maximum 4 times the diameter of the
rope from the top of the shackle, and the second clip is maximum 8 times the diameter
of the rope above the first clip. 245
19. A 300ohm resistor burns out, but you don't have another one. How can you make
one? - ANSWER>>2-600ohm resistors in parallel is 300ohms. Resistance is half of
highest resistor in parallel circuit. 3-225ohm resistors in parallel is 75ohms. 345
20. When cutting laminated panels, which direction should the finish side face? -
ANSWER>>Finish side facing the cutting edge of the tool. Blade will burr the backside
255
21. How do you cut a finished floor? - ANSWER>>Cutting blade away from finished side
255
22. A 480vac stepdown 240vac transformer is connected to a 3 phase rectifier, what is
the output voltage? - ANSWER>>320vac 3 phase full wave = 1.33x output voltage. 715
23) Car is loaded with 125% and sinks. Why? - ANSWER>>Slipping through the break
24. If you find a broken or missing barricade what should you do? - ANSWER>>Write up
a formal inspection request
25. What are the consequences of misaligned joints on a Rack and Pinion? -
ANSWER>>Broken Gear teeth. CWT derailment. Excessive wear/ crease the surface of
the tube 850
26. A dumbwaiter is 9sqft in area, 4ft high, and capacity is 13.9lb/ft3. What is total
capacity? - ANSWER>>9 x 4 x 13.9= 500lbs Max capacity
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller winniewaweru. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.99. You're not tied to anything after your purchase.
