Millwright Mix 1 Flashcards by amanda rees

A screw compressor is decommissioned and in storage. The machine next to it is vibrating, what will happen?

False brinelling

How well did you know this?

Not at all

Perfectly

Given the amount that you need to shim (.010”). How much do you shim the rack and how much do you shim the pinion?

Shim the rack .010”

How well did you know this?

Not at all

Perfectly

What would cause wear on a pinion?

Overload/too heavy a load

How well did you know this?

Not at all

Perfectly

What do you do before rigging/lifting the top cover of a turbine when dissembling?

Jacking bolts on top half

How well did you know this?

Not at all

Perfectly

What is located on all mobile hoisting equipment?

Inspection log

How well did you know this?

Not at all

Perfectly

When moving a 48 ton balanced load using 4 2-wheeled casters, how much weight should each caster be rated for?

12 tons (48÷4)

How well did you know this?

Not at all

Perfectly

What does a 3-axis robot mean?

Moves in multiple planes

How well did you know this?

Not at all

Perfectly

What is the crane signal for load down?

Extend an arm vertically.
pointing a finger toward the
ground, and make small
clockwise circles with the hand.

How well did you know this?

Not at all

Perfectly

What is the crane signal for boom down hoist up?

Extend an arm outward and
point the thumb downward,
opening and closing the
other fingers.

How well did you know this?

Not at all

Perfectly

What is in a break line that causes cancer?

Asbestos

How well did you know this?

Not at all

Perfectly

Who is responsible for all lock boxes in a plant?

Plant supervisor

How well did you know this?

Not at all

Perfectly

How do you install a thermal bulb in a container?

Thermowell

How well did you know this?

Not at all

Perfectly

Vanes destroyed in a pump after high vibration on startup. What is the cause?

Rotated the wrong way

How well did you know this?

Not at all

Perfectly

What is the most important consideration when using a symmetrical 3 legged bridle?

That load can be lifted safely /equal distance to center of gravity

How well did you know this?

Not at all

Perfectly

What does a vacuum breaker do on a vessel ?

Prevents collapse

How well did you know this?

Not at all

Perfectly

How do you mark the center line of a shaft?

Use center head scribe line, rotate 90ﾟ scribe again

How well did you know this?

Not at all

Perfectly

When moving heavy equipment across a bridge what is used to evenly disperse the weight?

Reinforce the bridge

How well did you know this?

Not at all

Perfectly

How would you clean your respirator?

Dry cloth and alcohol wipes

How well did you know this?

Not at all

Perfectly

How do you test a trip valve?

Close the valve manually trip

How well did you know this?

Not at all

Perfectly

A cylinder is acting erratically. What is the cause?

Bent rod

How well did you know this?

Not at all

Perfectly

A shaft rotates but has end play what do you do? Where do you shim?

Add Shim to one side

How well did you know this?

Not at all

Perfectly

How much material to make a guard with 4” x 8” sheets? One or two?

How well did you know this?

Not at all

Perfectly

How would you fix a crack in a shroud?

Drill hole in both ends and Weld

How well did you know this?

Not at all

Perfectly

How do you change out a sprocket for a smaller one?

Shorten chain and align (a to b)

How well did you know this?

Not at all

Perfectly

Belt slips on start up, what do you do?

Add counterweight

There is moisture in a receiver. What will be the result?

Slight decline in direction of flow

A belt is tracking off-center how do you fix it?

Adjust tail Pulley

Split housing of a turbine won't sit properly. How do you fix this?

Anti rotation tabs

What is the procedure for commissioning a compressor?

Set unloader then start up

What would cause volute to heat up?

Intake closed ( runs dry Burns off packing)

When replacing a gear but no new gear is available what would you do?

Rotate 180ﾟ and broach a new keyway If damaged- flip the gear over

How do you move/mount a K ( Tapered sleeve bearing) bearing?

Hydraulic nut

When welding 2 precision plates together what would you do?

Weld then machine surfaces

Horizontal band saw is jumping. How would you correct the problem?

Decrease feed increase coolant

Where do you put a condenser?

After receiver

What holds a bearing in the housing?

Internal snap ring

How is a compressor normally operated on initial startup?

Unloaded

Air dryer adsorption occurs what do you do?

Clean desiccant

Clutch is shock loading what do you do?

Adjust linkage

You used a connecting link but chain is too long. What do you use?

Offset link

Where does ground go when welding?

Closest to Weld as possible

What would cause blue smoke?

Worn piston rings (oil)

Belt is running off why?

Unsquared frame

A ladder must be pulled out from the wall by how much?

4:1 - 25%

What is the angle on a prick punch?

30 - 60ﾟ

What is the included angle on the center punch?

90°

How would you repair a bent shaft?

Set on V blocks and use hydraulic press

The horizontal direction is off by .010"

.005 movement

Knife blades are what type of balance?

Imbalance

Vibration measurement

Frequency (how much)

Given amount of shims required under each foot, which foot do you shim 1st?

Highest foot 1st (biggest gap)

What do you do before laser alignment?

Rough alignment

What is the 1st and 2nd step When beginning alignment?

Rough alignment then softfoot

There is a drop in amps what do you do?

Throttle inlet valve

True or false is a laser more accurate over a long span?

True

After rough alignment and softfoot is adjusted what is the sequence of alignment?

Vertical angular, vertical offset, horizontal angular, horizontal offset (VAVOHAHO)

What bearing do you use for low lubrication applications?

Bushing

Where is the fixed bearing located?

Next to drive end

What is the 1st thing you do before working with grease?

Put on gloves

Why are U joints installed?

For slight angular misalignment

A screw compressor bearing discharges. Where do you fix?

Fix on high-pressure side

What test measures the hardness of something? (Penetration)

Rockwell hardness test

What is the end procedure when finished welding?

Shut off torch, shut off tanks, bleed lines

What is a routine maintenance check on a turbine?

Check oil

Where is the best spot to take a oil sample?

Before filter

Which valve gets greased?

6" rising stem gate valve

Sequence valve in hydraulic cylinders is located?

Between valves (line c)

What are good qualities for mentoring an apprentice?

Good knowledge base and communication

How do you check the temperature of a bearing?

Temperature gun

What is the 1st consideration when transferring liquids?

Remove Ignition sources

How do you find a safe operating temperature of equipment?

The manual

As a choker sling angle decreases what happens?

More stress on the slings

What do you do when you're done working with the torque wrench?

Release Tension

What do you check 1st after new motor installation?

Mag test/rotation

What is the procedure for replacing DCV spool ?

Lube before installing

System that uses past and present equipment history?

Predictive

System that's schedules?

Preventative

What is the procedure for commissioning a reciprocating water cooled pump?

Vent jackets, water pressure, start pump, test

How much do you feel a gear Box with a oil?

Half way up the lower roller

A belt worn on one side how do you correct?

Align sheaves

Cylinder doesn't fully extend what is the cause?

Bent rod

There's hammering in a pump system. What is the cause?

Cavitation

What sling has the most stretch?

Synthetic Web

Contact seal leaking what is the cause?

Shaft run out

What type of oil is used in a compressor crank case? What type of oil is used in a diesel engine?

Non detergent -compressor detergent - diesel engine

What is the procedure for rebuilding a reduction gear drive?

clean, mark, take a part

In a new system what relief valve do you choose?

Maximum system pressure

Cylinders are moving slowly why?

Internal leakage/pinched line

When does a new employee receive orientation?

Before work starts

Before working on fan blades what is the procedure?

Deenergize, lock out tag out, secure blade, fix

What causes vibration in an induced fan?

Build up

A hydraulic pump is operating normally at the right speed but there is no pressure what is the cause?

Faulty relief valve spring

Setting Up optical level procedure

Wooden Tripod

Procedure to repair prime mover

Clean, match mark, disassemble

What is the procedure before grouting?

Elevation, rough surface, clean, sole plate, torque 50%

What is the procedure to shorten a conveyor belt?

Slacken, secure, cut, install, splice, tighten

Belt deflection

1/64

How much can you run up a drive?

75% 3/4 Moderate speeds

Before working on a fan procedure

Deenergized, lock out tag out, block fan blades, etc