mechanic test review
What is the overlap minimum on 2 and 3 speed doors?
horizontal - 1/2"
vertical - 1"
what are the minimum and maximum clearances between sill and car doors?
1/4" Minimum
3/8" Maximum
What is the minimum and maximum sill to sill gap?
1/2"- 1 1/2"
1 gallon equals how many cubic feet?
.134 cubic feet
how many gallons are needed to run a plunger 30'?
Convert 30' into inches = 360"
3x3x3.14=28.26
28.26x360=10,173.6
10,173.6 times 231 = 44.04 gallons what is the conversion for Kg to pounds?
1 Kg = 2.205 pounds
what is the purpose of a gear reduction unit on a geared machine?
Increased lifting capacity
How quickly should the switch for the government open? Electrical - 90% of tripping speed for
150 -500 fpm.
95% for anything over 500 fpm.
at what distance from closed does the gate switch operate?
2"
What are the most common features of Load weigh?
Control the generator field and inside express operation
does a GFCI work?
Detects imbalance between hot and neutral wires
A motor needs a sleeve bearing replaced, what type of bearing do you need?
Friction Bearing
(anti-friction bearing = ball bearing)
Using binary logic, What dip switches must be on for a 128 bit 30 second timer at 150%?
1,3,4,6 = 45 seconds
How do you attach brackets to brick?
Inserts set back 1/4' into the block. code could call for through bolt.
A car weighs 2500 pounds with a capacity of 2500 pounds. The CWT is weighted at 40% how
much is the motor lifting when the car is fully loaded?
2500(car)+1000(40%)=3500
1 500 pounds lifted by the machine is equal to 5000-3500. what are the consequences of
misaligned joints on a rack and pinion?
, -Broken gear teeth
-CWT derailment
-excessive wear
-crease the surface tube.
a 480 vac step down 240 vac transformer is connected to a 3 phase rectifier, what is the output
voltage?
320 vac
3 phase full wave =1.33x output voltage
1.33 x 240= 319.2
a 300 ohm resistor burns out but you don't have another one , how can you make one?
2 - 600 ohm resistors in parallel is 300 ohms. (resistance is half of the highest resistor in a
parallel circuit)
3 - 225 ohm resistors in parallel is 75 ohms
how is a class1 yearly buffer test performed?
car on inspection at the bottom landing. Jump out direction and final limits. with the pit clear run
down to compress the buffers. The buffers should fully extend in 90 seconds.
(5 year: full load, full speed)
(CWT: empty, full speed) you need to work on a frieght door retiring cam, you LOTO the
mainline but there is still power on the cam. What circuit is still hot?
-Disconnect the door operator -Mainline disconnect.
a contractor wants to raise the car speed from 100 fpm to 125 fpm. it currently has a 12"
sheave. What size sheave is required?
Diameter = 12"
12/4=3" (25 fpm= 3")
100 fpm + 25 fpm = 12+3 = 15" sheave
What are extension tubes used for?
Necessary clearance for placement of concrete forms.
If a hoist motor is making noise, what is the problem?
needs inductors
What is the area of a 10" plunger?
Pie x radius squared = area
3.14x5x5= 78.5
you are testing an elevator with a rated speed of 500 fpm. What ought to be the safeties'
minimum speed setting? Mechanical : 115% x 500 = 575 fpm
Electrical: 90% x 575 = 517.5 fpm
What is the tolerance for 3/8 at .003?
372-.378
bilateral=2 direction unilateral=1 direction
you are installing the limit cam on the car and notice that the holes are not lining up. Where do
you find the correct location for the cam?
The mechanical detail drawing.
you are on a call and find the pulley came off of the pump motor and the set screw is missing.
What kind of screw would you use to replace it?
cup screw
What is the overlap minimum on 2 and 3 speed doors?
horizontal - 1/2"
vertical - 1"
what are the minimum and maximum clearances between sill and car doors?
1/4" Minimum
3/8" Maximum
What is the minimum and maximum sill to sill gap?
1/2"- 1 1/2"
1 gallon equals how many cubic feet?
.134 cubic feet
how many gallons are needed to run a plunger 30'?
Convert 30' into inches = 360"
3x3x3.14=28.26
28.26x360=10,173.6
10,173.6 times 231 = 44.04 gallons what is the conversion for Kg to pounds?
1 Kg = 2.205 pounds
what is the purpose of a gear reduction unit on a geared machine?
Increased lifting capacity
How quickly should the switch for the government open? Electrical - 90% of tripping speed for
150 -500 fpm.
95% for anything over 500 fpm.
at what distance from closed does the gate switch operate?
2"
What are the most common features of Load weigh?
Control the generator field and inside express operation
does a GFCI work?
Detects imbalance between hot and neutral wires
A motor needs a sleeve bearing replaced, what type of bearing do you need?
Friction Bearing
(anti-friction bearing = ball bearing)
Using binary logic, What dip switches must be on for a 128 bit 30 second timer at 150%?
1,3,4,6 = 45 seconds
How do you attach brackets to brick?
Inserts set back 1/4' into the block. code could call for through bolt.
A car weighs 2500 pounds with a capacity of 2500 pounds. The CWT is weighted at 40% how
much is the motor lifting when the car is fully loaded?
2500(car)+1000(40%)=3500
1 500 pounds lifted by the machine is equal to 5000-3500. what are the consequences of
misaligned joints on a rack and pinion?
, -Broken gear teeth
-CWT derailment
-excessive wear
-crease the surface tube.
a 480 vac step down 240 vac transformer is connected to a 3 phase rectifier, what is the output
voltage?
320 vac
3 phase full wave =1.33x output voltage
1.33 x 240= 319.2
a 300 ohm resistor burns out but you don't have another one , how can you make one?
2 - 600 ohm resistors in parallel is 300 ohms. (resistance is half of the highest resistor in a
parallel circuit)
3 - 225 ohm resistors in parallel is 75 ohms
how is a class1 yearly buffer test performed?
car on inspection at the bottom landing. Jump out direction and final limits. with the pit clear run
down to compress the buffers. The buffers should fully extend in 90 seconds.
(5 year: full load, full speed)
(CWT: empty, full speed) you need to work on a frieght door retiring cam, you LOTO the
mainline but there is still power on the cam. What circuit is still hot?
-Disconnect the door operator -Mainline disconnect.
a contractor wants to raise the car speed from 100 fpm to 125 fpm. it currently has a 12"
sheave. What size sheave is required?
Diameter = 12"
12/4=3" (25 fpm= 3")
100 fpm + 25 fpm = 12+3 = 15" sheave
What are extension tubes used for?
Necessary clearance for placement of concrete forms.
If a hoist motor is making noise, what is the problem?
needs inductors
What is the area of a 10" plunger?
Pie x radius squared = area
3.14x5x5= 78.5
you are testing an elevator with a rated speed of 500 fpm. What ought to be the safeties'
minimum speed setting? Mechanical : 115% x 500 = 575 fpm
Electrical: 90% x 575 = 517.5 fpm
What is the tolerance for 3/8 at .003?
372-.378
bilateral=2 direction unilateral=1 direction
you are installing the limit cam on the car and notice that the holes are not lining up. Where do
you find the correct location for the cam?
The mechanical detail drawing.
you are on a call and find the pulley came off of the pump motor and the set screw is missing.
What kind of screw would you use to replace it?
cup screw
