Journeyman Flashcards
what type of air filterlast longest
pleeded
how to check for voide in grout- tape with a
hammer
what type of pump should be used in hot fluid
center mount
how are nuts on tanchinbolt tighten
by hand
how do you stration a crank shaft
hydrolic jack press
the most accurate mothod of checking the bearingclearance but also the most time consuming
measurement
the most common cause of dearing failure is
lack of lubrication
what is a sentind valve used for
a worning device
when you want 100% of powerfrom a turbine
open extration control valve and close
most efficient steam turbin is a
condusing turbin
what determines the efficiency of a turbine
temperature going accrare the turbine
what needs to do done to a turbine when taken off a turbine cover
remake running key and install assembly key
what needs to be done when putting a turbine cover back on
remove assembly key and install running key
what is mounted on the turbine causing exposed to the internal steampressure for avorring devise
sentinel valve
buildup can be removed in a turbine using
blasting then with walnut shells or rice or high pressure dry ice
how is a frichion bearing held in place in a steam turbine
molted babbid forms to the key
how many lock bearings are on a shaft
1
where are the defusers located in a gas turbine
between the compresser and cumbustion chamber
low pressure steam turbin is vibrating to muchhow can it be fixed
tighten the lock wier
can two universel cuplingsface perfect with each other
no cases burnelling of the bearings
what is the best method on filling bins or contoners with a convater
tripper
what is found in the side of the side lodding shoots to overcome this proplem, baffles are installed in the chute to slow material and direct it to the centre of the belt
what should slherting be made from
a softer material
if material was falling threw the skeeting you would have to
decrease skeeting clearance
if a convater is slepping on start up
you add more weight to your counter weight to stop the slipping
what is the strongest belt splice
hot volcanizing it can achieving 90% belt strength
what is the benfit of side legging
change legging with out removing the belt
what would cause a belt to touch the hole way around
incorrect belt splice
to maintain efficiency on a drag convator
keep tension on chain
a fluid coupling fusible plug
where the plug in the coupling melts on high heat and loses all fluid
in a prematic conveying system wear takes place mostly on the inside of the outside radius on pipe bends
the curved section
if a gear box is running hot there is probably to much
oil
if your using a plumbot outside have it in a bucket of
oil so it cant blow in the wind
check the level all around after tightening theanchor bolt nuts to ______of their final torque value
50%
how deep do you put a fixed anchor bolts
depth not less then 25D
typically foundations are set 3/4 inches to 1 1/2 inches ( 19mm to 38mm) low to allow for grout
plan view is looking down, elivatio view is the side view to see elivation
welding current can damage bearing. ensure that the bearing is not between theground of the welding machine and the welding location
off set centreroller are used for where there is low head room
one section of the beltruns off at all points on the line. the cause of this could be
belt is improperly spliced or out of square to fix this resplice
belt slips on starting this can be caused by counter weights are to light to correct this increase the counter weight or increase the screw take up tension
when using strobe light to do vibration analyzer you can use it to find the ________
phase angle
where can you get machine normal operating vibration
the machines operator
to determine the angle between O and T measure the angle with ______
a protractor
static unbalance is sometimes called force or _______
kinematic unbalance
it is caused when the shaft weight is ______ along the length
evenly distributed
the primary purpose of prevention maintance is to
increase production
the difference between pretventive and predictive maintance is
when maintance is performed
small plant maintance operation s may very upon ______
a logbook (logbook must be with machine to keep record maintance work)
Before putting a electric motor to use preform a _________
electrical insulation resistance test
the scale of emissivity ranges from _______
0.00 (where there is no emission) to 1.00 (where the object is completely emitting energy)
ISO is ?
international organization for standardization
where should a oil sample be taken
after the equpment of interest
when should you take a oil sample
when the equpment is operating under a load
ultrasonic thickness gavging can measure
thickness to a accuracy of 1%
when should oil be on a rolling elimant with oil
half way up the lower ballroller
how mach should grease be in a rolling elimant
3rd to half
what type of impeller is good for long fiber materals
open face
what makes the best back fill
crushed concreat
best way to lift a turbine is a
spreder bar
how do friction bearing self alining
spherical seat
what kind of grease goes in a robot
robot grease
tools and equipment used to install, diagnose, maintain and repair _______ and __________
robotics and automative
When the downward force at C2 is 100lbs and D2 is 2.5 inches, the upward force at C1 will be _______ lbs if D1 = 4 inches
384
Add the following decimals and express the answer to three decimal places.
0.4789 + 3.125 + 9.656
13.259
What are common materials used as electrical conductors?
Silver, copper, aluminum
Large impulse turbines will use what of rotor?
A. Build up rotors
B. Solid rotors
C. Combination of solid and build up rotors
D. All of the above
D. All of the above
The shape of a ball bearing is ______ when a load is applied to the ball
Elliptical
Not a stress, but the result of stresses
Fatigue
The two main estimates
Cost and time
What is the primary purpose of preventative maintenance?
Increase production
80 chain is what size?
8/8 = 1 inch
What coupling requires lube?
Metal to metal (grind, gear, chain) not metallic disk
Where are vibration readings taken from?
HVA - Horizontal Vertical Alignment
When do you take an oil sample?
When the unit is running
What would cause oil in the gearbox to go milky?
A gearbox constantly starting/stopping can cause condensation and make the oil milky
How do you weld long distances without distorting?
Short stitches along seem (tacks/back stepping)
How do you shorten a chain sling?
Grab hook
60 degree angle between two slings, 12’ long. What is the distance between the I bolts?
12’
How do you reverse the flow in a vane pump?
Flip the cam 180 degrees
How should packing be staggered if 4 rings are used?
90 degrees
What should you do before putting packing in place?
Roll it out to flatten it.
A PRV is blowing OFF in the intercooler of a two stage reciprocating compressor, why
The 2nd stage inlet valve is leaking/bypassing
If there is excessive heating in a 2 stage reciprocating compressor, what is the issue?
Faulty intercooler (red fins plugged)
How do you fix tears in a conveyor belt.
Belt clips (bolt type fasteners)
How high should a personal work platform be before it needs guardrails?
1.22m / 4 feet
How high should a hand rail and mid rail be?
4 feet and mid rail half down at 2 feet
What kind of oil goes in the crank case of a compressor?
Non-detergent. Detergent oil can cause carbon build up/hot spots
If a lobes pump output volume decreases over time, how do you fix it?
Decrease clearance
What is the result of heating up an HS8 bit
to cherry red and dipping it in oil?
Hardening
What does ‘2’ in EP2 grease mean?
Penetration (the higher the number (up to 6), the harder the grease
Chatter in gearbox?
Broken tooth
High chrome levels in oil, why?
Low oil level. Heat causes ball bearings to wear prematurely
What type of welding would you use for a large gap?
Mig
What is the general practice for filling a hydraulic tank for the first time?
Offline filter/ filter cart
How often should you inspect fall arrest equipment?
Before every use
If a belt is travelling off centre, how do you adjust it?
Adjust tail pulley
You find a bent eyebolt, what do you do?
You take it out of service and destroy
During a lift, there is a signal man designated for the operator, the load is heading toward a power line. What do you do?
Emergency stop
What is the best way to lift a 20T turbine rotor?
Spreader beam
A 3 phase motor fails to operate properly and starts to hum, it’s likely
A blown fuse
How do you detect bird caging?
When there is no load
What is the best way to detect surface cracks in a weld?
Dye penetrant
Crane signal for boom down?
Thumb down
Crane signal for stop (Non emergency)
Arm in and out
What do you use to store machine data?
Computer database
What should you do during a large lift to ensure the safety of people?
Red tape area and remove all no-lift personnel
What do you do to a drill bit before drilling brass?
Brassing the drill - flattening the cutting edge
What do you use if you don’t have a clamp to pull chain ends together?
Lace
If you have contaminants outside a gearbox, what seal do you use to keep the contaminants out?
Double lip seal
What do you do for commissioning a new piece of equipment if you have no manufacturer specs?
Check oil level and jog
The most efficient way to keep a gearbox lubricated?
Scrapers and troughs
How do you prevent material from getting trapped between the belt and the tail pulley?
Install v-plow just before the tail pulley (inside of belt)
How is a gearbox sized?
Vertical distance between shafts
Oil level on a bearing?
Half way up the lowest rolling element
When replacing skirting on a conveyor
Use a softer material than belt - no clearance gap
How do you shorten a type of chain?
A chain breaker
How do you detect soft foot using a dial indicator?
Tighten all feet, set up dial on one foot, then loosen that foot.
