Millwright Mix 3 Flashcards
When maintaining the point of a center punch how is the center punch held?
Perpendicular with grinding surface of wheel and rotate while grinding
What is the procedure to maintain a handheld grinder that is sparking in the housing?
Remove armature and replace brushes
How is a class A fire extinguisher stored?
Vertically and in an environmentally controlled area
When are safety lanyards checked?
Before every use
What is the tap drill size for a 5/8” UNC-11- 2B thread?
0.534”
When operating a magnetic base drill in an overhead position which precaution is taken?
Secure with safety strap
When performing a manual control lockout what deactivates the control?
Programmable logic board PLC
When performing work in an industrial setting what is the most important thing to consider?
Wearing PPE
Which additive is added to oil when lubricating hypoid gears?
Extreme pressure EEP additive
The total indicator reading on the rim of a coupler is .012”. The faces of the coupling are parallel and the motor is low. Which size of the shim is used under the motor feet?
.006”
Which type of thread is used in bench vises?
Square
What is the procedure to verify the diameter of a piece of round stock along its length to a thousandth of an inch?
Use a Vernier caliper at 1’ intervals
What is the 1st step of the installation of a base plate for a new machine?
establish center lines
What procedure is followed to determine the center point on the end of a shaft?
Scribe a line using a center head and rule, rotate 90゚ and scribe another line.
When installing a packing robot what is the 1st step when using an optical level?
Center the fish eye bubble
What causes a noisy neutral flame when cutting mild steel?
There’s too much acetylene in the flame mixture
Which type of material is cut with an oxy-acetylene torch?
Mild steel
There should the ground cable be connected when arc Welding?
Close to the work as possible
The benchmark reference lines reading is 58.750” and the average sole plate reading is 9.125” what is the sole plate elevation?
49.625 “ HI-FS=ELEVATION
Dimension Y is 15’ 4” and dimension Z is 20’ 5” what would dimension X be to ensure the conveyors are installed perpendicular to each other?
25’ 6”
When a .050” shim is required to level one end of a 18” level on a 6’ bed plate. How much shim is required to level the plate?
.200” (high over low)
What is the most important step before performing maintenance work on a pressurized system?
Bleed the system
Which document contains information on scheduled maintenance to be performed?
Work order
A load is being lifted with 12’ slings. What is the distance between the lift points when using the recommended safe Working angle of 60゚ at the Apex?
12ft Equilateral triangle
The working load of the choker sling arrangement is 22500lbs. What is the working load rating of the same sling used in a straight vertical lift?
30000 lbs
What is used to lift a motor pump base with a machined surface?
Softeners and Web slings
When checking diameter of a wire rope where is it measured?
Across the widest point
Which type of block is used to change the angle of the pull of a wire rope?
Snatch block
A Crane requires a secure lifting area of 400 ft² what is the lift radius is required?
11.3 ft ( A=pi R squared)
During a post-lift inspection of a hoist rope. 3 wires in one strand over 1 lay are broken, what is done?
Take out of service and replace rope
After using a term buckle, what is the term buckle inspected for?
Deformation, cracks and thread damage
A pin has been welded into a shackle what is done?
Dispose of shackle
Which length of rope is needed to complete 3 dead wraps when replacing the cables on a 12” diameter drum?
113”
When inspecting eye bolts it is discovered that 1 of the eye bolts is bent, what is done?
Dispose of eye bolt
What is the procedure for coiling a fiber rope for storage?
Coil the rope in a clockwise direction, loop the rope tie, with two 1/2 hitchess while leaving a short end for hanging and hang on a peg
How are slings stored?
controlled environment and hanging vertically
What is the start up procedure after installing a steam turbine
Start the jacking pump to lift turbine, start turning gear, start auxiliary pump, shut down jacking pump and preheat turbine
Upon startup an electrical 3 phase motor will not achieve desired RPM and emits a loud humming noise what is the cause?
Power supply is single phase
A diesel engine is used to power a backup generator. After a long period of inactivity, excessive cranking is required to make the engine start. What is the cause?
Glow plug failure
What is the procedure to replace a bearing in a front cover of an electrical motor?
Support shaft, remove front cover, replace bearing then replace seal
What is used to clean dirty gas turbine compressor blades?
Walnut shells
When maintaining a large electrical motor in a high load, high temperature environment. Which type of lubrication editive is used?
Extreme pressure (EP)
Which type of Babbitt bearing is used when installing a heavily loaded shaft where the load will be slightly above horizontal?
Angle
A standard spherical roller bearing is to be installed but a reference table is not available. By how much is the initial clearance reduced?
50%
75% -for ball bearing
What is used to install an 18” internal diameter bearing that has an interference fit on the shaft?
Induction heater
During a routine inspection, a pillow block bearing has dark discoloration seen on rolling elements. What is the cause?
Overheating