LEVATOR MECHANIC ACTUAL EXAM QUESTIONS

LEVATOR MECHANIC (ACTUAL / ) EXAM QUESTIONS

WITH ANSWERS | VERIFIED

While adjusting a passenger elevator door operator with a PERMANENT MAGNENT DC motor. Which operation would you perform to control the motor? - ---Ansqwers---Speed and Torque control is accomplished by varying armature current and voltage only

SHUNT MOTORS: shunt voltage increases, torque increases,

speed decrease. Shunt voltage decreased, torque decrease, speed increase Armature voltage increase, rotation speed increase affecting door speed and torque.

What does ASME code specify regarding clearance between skirt panel and the side of the step tread? - ---Ansqwers--- Skirt board switches required at upper and lower ends. Gap no more than 3/16"

After receiving an inspection report, one violation is door closing force. After checking you read 50lb of door force, is this code? How do you make it code compliant? - --- Ansqwers---Not code. Code is 30lb or less. To fix it you need to adjust the torque/speed of door operator

You momentarily actuate the motor starting relay, the direction of rotation is not correct, what can be done to change rotation direction? - ---Ansqwers---Reverse any 2 leads of incoming motor phases. 1 / 4

Before you can move a piston on a hydro, what precautions must be taken? - ---Ansqwers---Check the piston for debris and tightness of the head, make sure pit is clear

You are preparing to hoist the car for cable installation, before doing this, what needs to be installed? - ---Ansqwers---The governor cable

While on service you observe the mechanical style safety edges on center opening doors bumping into each other, reopening the doors. Where do you need to look to repair this problem? - ---Ansqwers---The safety edge retraction mechanism

You are about to trouble shoot an elevator that is off, what print would help to make it easier to trace the circuits? - --- Ansqwers---Straight Line Diagram

The fuses on a 3 phase input to DC direct drive are open, and the elevator will not run, what needs to be done to check for a shorted SCR? - ---Ansqwers---Remove the SCR, connect +lead to Anode, -lead to cathode, jumper between ANODE & GATE .7v if good. Remove jumper and it should stay on, remove a lead should read infinite

Trouble shooting a 3 input AND gate, all inputs are high, but the gate output is low. What is the problem? - ---Ansqwers--- Faulty gate. Truth table says output should be high. 2 / 4

When going to a trouble call you find that the machine room has 2 inches of water in it, what is the first thing you do? - --- Ansqwers---Leave the Machine room

You find a blown fuse in the DC circuit feeding the door motor.When picking a replacement fuse what should you do? - --- Ansqwers---Compare the blown fuse to the fuse rating in the straight line diagram

A DC door motor supplied from a 3 phase rectifier runs slow.The DC voltage is normally 320 is 220. What should you do? - - --Ansqwers---Check the fuse feeding the AC rectifier

There is a call that a traction elevator is stuck in the overhead.In order to get the car down, what circuits do you need to jump out? - ---Ansqwers---The primary safety circuits

You just pulled multi-cables down the hoistway of a high rise.How should you provide strain relief for the cables? - --- Ansqwers---Required every 100'. Begin installing at the lowest and work upwards to adjust and tension

Installing Horizontal sliding doors with guides in each door panel, how far must each guide engage the sill gauge? - --- Ansqwers---¼ inch

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Your supervisor informs you to change software on a hydro microprocessor board. The software is a 24 pin DIP package.To properly orientate the new chip on the board, what must you do? - ---Ansqwers---Verify that the notch on the dip chip matches the notch on the board

You need to speed up an AC motor that has a fixed number of poles. How can you speed it up using the RPM formula? - --- Ansqwers---Change the frequency.RPM= 60 x F / P/2

You have finished digging a hole hydro, the jack is not on site.What must the hole have on it before you leave? - --- Ansqwers---A welded cover

A CWT frame weighs 10,000lbs and needs to be increased by 5%. What is the new weight of the frame? - ---Ansqwers--- 10,500lbs 10,000 x 5 / 100= 500lbs +10,000 = 10,500lbs

You have 32' of rise in scaffolding and are using a 3'x5' base.Where are tie offs? - ---Ansqwers---1st at 12' and cannot be more than 26' apart vertically 30' apart horizontally

How is a step level switch on an escalator reset? - --- Ansqwers---Manually

What is the Law of Power? - ---Ansqwers---P=ExI

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