100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
LA City Questions and Answers Fully solved $15.49   Add to cart

Exam (elaborations)

LA City Questions and Answers Fully solved

 9 views  0 purchase
  • Course
  • Elevator mechanics
  • Institution
  • Elevator Mechanics

Exam of 6 pages for the course Elevator mechanics at Elevator mechanics (LA City)

Preview 2 out of 6  pages

  • May 14, 2024
  • 6
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers
  • Elevator mechanics
  • Elevator mechanics
avatar-seller
Dreamer252
LA City
How many passengers are allowed on an elevator with a 2000 rated load? - answer 13(150lbs per person) 2000/150=13.3
What is the minimum clearance around a hoist machine? - answer 18 inches
When must oil buffers be used? - answer Over 200FPM (0-50 solid/50-200 spring/200-up oil)
Where must the light switch be mounted in the machine room? - answer Within 18 inches of the locked side of the entrance door
What is the allowable maximum force developed by a door closer? - answer 30 foot pounds
What is the maximum tripping speed of an elevator governor with a rated speed of 200FPM? - answer 175FPM & not less than 115% of rated speed
At what opening height & above are pull straps required on vertical opening manual doors? - answer 6 feet 6 inches (6'6")
If the escape hatch of the elevator is 16 inches wide what is the minimum length? - answer 25 inches* escape hatch must be a minimum size of 400 sq inches
What is the color of wire used for grounding under LA city code? - answer Green
What is the weight of the counterweight when the weight of the car is 6000lbs and the rated load is 4000lbs? - answer 7600lbs (determine what 40% of rated load is & add that to the weight of the car.)
4000lbs capacity X 40% = 1600lbs + 6000lbs = 7600lbs
What is the minimum diameter of a compensating sheave? & of a suspension sheave? -
answer Compensating sheave= 32 times diameter of the cable Suspension sheave= 40 times diameter of the cable
What is the maximum speed of an escalator? - answer 125FPM What is the maximum number of degrees along the incline from the horizontal, for an escalator? - answer 30 degrees
Where should metal straps be place on conduit? - answer 3 feet from boxes, fittings or connectors
Where should metal straps be placed on flex? - answer 12 inches from boxes & connectors
What is the maximum size allowable for E.M.T.? - answer 4 inches
What is the breaking strength of 1/2" rope?
5/8" rope? - answer 1/2"= 14500lbs
5/8"= 23500lbs
Which is the most flexible of wire ropes? - answer Tiller rope
What is the most common cause of wire rope failure? - answer Lack of lubrication
Remember - answer 8x19 cable is more flexible but not as strong
6x19 cable is not as flexible but is stronger
What is the most common cause of accidents for mechanics prepared for cartoon inspection? - answer Not observing running clearance
What is the maximum voltage allowed to run to the cab? - answer 300 volts
Does code allow 220VDC AND 110VAC conductors in the same conduit? - answer Yes. As long as the insulation is adequate for the voltage
How do you check for a ground on a wire? - answer 1st turn off the power, then read wire to ground with a bell or meter
How do you reverse a three phase motor? And a DC motor? - answer AC- swap any two leads
DC- swap field or armature leads
Remember - answer Power is equal to I•E *example - 20 amps x 110 volts=2200 watts
Code requires the neutral wire in 110 VAC circuit be what color? - answer White
Why is a guard attached to the front of the elevator? - answer To prevent shear injuries
The minimum height of a counterweight guard from the pit floor is? - answer 7 feet

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

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

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 Dreamer252. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $15.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

82871 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$15.49
  • (0)
  Add to cart