Study Questions Flashcards
Erosion is in low pressure blades
Also most wear in steam turbine
What’s measures the phase on a machine
Strobe light
Measuring the centre line distance clearance
0.67 mils
The ignition coil in an engine
Transistor
Belts and chains tension or sag
2%-3%
If pipe ID doubles the speed will
Decrease by 1/4 (25%)
What direction does thrust in steam go in turbine
Same direction as flow
How many power strokes does a 6 cylinder 2 stroke engine have in 1 crank revolution?
6 power strokes
What is best for condition monitoring on a diesel?
Oil analysis
Gear has 24 teeth and runs at 3600rpm in hz
24x3600/60 = 1440HZ
Where is the highest pressure in a gas turbine?
Diffuser
Where is secondary air introduced?
Intermediate section
What gasket type is used for highest pressures
Steel ring type
What controls firing order
Crankshaft throws
What is the pressure rating for the flange
150
What check valve is NOT good for high pressure
Flap? Disc?
What does the centrifugal separator do
Cleans the air
What actuates an over speed trip
Centrifugal force overcomes the spring
How do you fix crankshaft deflection?
Shim and level the base
Does the image show a hanger bearing or a gudgeon shaft?
Hanger bearings are in the middle.. shaft is beside them. Plate that connects 2 shafts
How do you choose the correct gasket material
Internal pressure and bolt tension
What chain is used with abrasive material?
Mill chain
What is a chain that doesn’t bend backwards
Rooftop/camel back
Ammeter measures in
Series
Voltage measure’s in
Parallel
What does the servo valve act on in hydraulic Governor
Flyballs/flyweights
What pipe is used for its corrosion resistance
Cast iron
And stainless steel?
Shim movements
Count the hot?
Power? Find the amps first
I=square root of P over R
What stroke would you be on if both valves are closed
Compression or power stroke
What is valve overlap
When intake and exhaust valves are open at the same time
What is used with the proximity probe
A container of water to cool
Stop button is normally closed
Let’s electricity pass through until pushed to open circuit
The root cause of a problem
WHY! Did it happen.
Why did that happen
Why did that happen
Why? WHY!? WHYYYYYYY!
What is the purpose of the blind
To close two flanges
Wire lacing is used when?
Replaces shroud to keep blade tips in place on low pressure side of large reaction turbine
What does the condenser do in steam turbine
Increases pressure differential (vacuum)
What is the purpose of artificial aspiration
Increase horse power
A type of splash lube
Oil dipper
Inner race damage of bearing in ball pass frequency
0.60 x RPM x # of rolling elements
Frequency of in imbalance
1 x RPM
Secondary air is used for
Cooling
Large turbines use kingsbury tilting pads
Yeah. The kingsbury
What is the cause of diesel cylinder misfire?
Sticky valves
Ultrasonic testing uses
Sign waves
Screw conveyor pitch?
Half pitch
Where do you measure pipe strain
Measure at 0° and 90° on the coupling
What is BMEP?
Brake mean effective pressure
Spray carburetor is part of?
LPG
Installation and mounting to bedplate is critical when torque to foundation
Uhh? Fuck yeah?
Where is the block deck height measured
From centre of the crank shaft to the bottom of liner bore depth
What is the max deviation of main bearing bores
1/2 of the initial clearance of a new bearings
When should you NOT use chrome rings
In a chrome bore
Electrons flow negative to positive
Conventional is positive to negative
What do transformers use to step up or step down voltages?
Inductance
Peen blades on the outside is the
Tenon
What causes the main stop valve to close
Spring
What is a bridge gauge
Manufacturer bracket that quick measures bearing clearance
What is the gradual deviation in speed in a prime move that is not properly governed
Speed drift
XIC symbol
XIO symbol
Click the tiny picture you doink
2 most common ways to measure pressure
1-Bellows operated pressure switch
2-diaphragm operated switch
Double pole single throw symbol
Click the tiny picture and snap one off booiiiz
What is the main cause of oxidation
Heat
Gum and varnish = sticky valves
Oil samples taken should flush how many times
5 flushes
Micron sizing
4/6/14
Ounce inches
Twice the distance half the weight
What do you need to find Trial weight size
Weight of rotor, RPM of rotor and radius where you placed weight
Where is the heavier weight placed
On the closest blade to the imbalance
How do you hold gasket in place while using the hammer method
Install 2 bolts through it to hold in place
How do anaerobic sealants cure?
In the absence of air
Which elbow has both male and female threads
Street elbow - that hard ass motha fucka
What is the useful limit of a benchmark gauge
95%
60° - min
90° - ideal
120° max
Highest temperature insulation
Ceramic
Or refractory?
What insulation is best used for coldest temp
Cellular glass
Research and development stage
Innovation stage
What type of chains are used as transfer chains
Rooftop and roller chains
How is the width of conveyor chosen
Width of largest package used
Lowest number of rollers in contact with package
3
Lowest number of SKATE rollers in contact with package
5
