Red Seal Prep Flashcards
When combustion occurs in an engine the force on the piston is transferred to the crankshaft via the
Connecting Rod
With a hydrostatic drive system, which valve sits at just above the back pressure in the return line of the main system?
Relief
A tongue and groove type of gasket joint and flange face is classified as
Confined
What valve causes the fluid to change direction in two directions and is good for throttling?
Globe Valve
What are the three key elements of WHMIS
Worker education, labeling requirements, MSDS
Which valve is used to depressurize part of the system and often used to recirculate liquid?
Unloading valve
Vacuum hoses are designed to operate ______ atmospheric pressure
Below
At what angle should a ladder be placed?
75°
On a metric micrometer, how many turns of the spindle would you need to obtain a measurement of 5mm?
10
What is the minimum measurement on a metric micrometer?
0.01mm
When aligning a pump that will be pumping hot liquid, how would you position the motor?
Shim the motor higher
What should be installed before starting up a new pump?
Pressure relief valve
The theoretical power of an engine is referred as
Indicated horsepower
What is the type of air filter that throws the dirt particles outwards and into a collector?
Spiral rotor (cyclone?)
What should be checked if a hydraulic cylinder moves slower than normal?
Supply hose kinked or collapsed inner tube
If there is too little valve to stem clearance on an engine, what would happen?
Burnt valves, poor performance
_____ piloted valves use part of the pneumatic energy from within to assist in shifting the sealing member
Internally
On a new pump commission where would you install a temporary strainer?
Upstream of the inlet
By using a precision level you determine that the gauge reading is 0.05. The base plate to be leveled is 6 feet long and the length of your precision level is 18 inches. What shim size would you need to level the base plate, and whats the equation to figure this out?
0.20 S=R x (L / A) S = Shims R = Reading L = Overall Length A= Length of Level
Which pin would you use to align parts during assembly?
Tapered dowel pins
The purpose of a lockout on a piece of equipment is
prevent movement through immobilization
If a cylinder has a crack that is not the full length of the bore, a sleeve can be used to correct the problem
True
A flat face type of gasket and joint is considered
unconfined
Whats the term for an engine that is connected to a separate load?
Non-integral
A lifter is a solid or hydraulic device that connects what to what?
camshaft and the pushrod
What device would you use to construct a large circle on a work piece and where you set it?
Trammel set on radius
How many turns to open an acetylene bottle?
1/4 to 1 1/2
Which fuel has the best heat value? a) Natural Gas b) Propane c) Gasoline d) Diesel
d) Deisel
In a hydraulic system schematic, what is the broken line that connects the inlet piping to the bottom of the valve?
Pilot line
What does the actuator do on an electric governing system?
Moves the fuel metering control to change the amount of fuel delivered
What is the problem with a pilot operated directional control valve when the remedy is to check for solenoid problems such as power failure?
The main valve shifts when you manually shift the pilot
Passages are drilling into an engine block to provide
passage for oil
A 24 foot ladder is leaned up against a wall, what should the maximum distance out at the base be?
6 feet 4:1 equipment 5:1 workers 10:1 Public 20:1
What is the most important thing to do prior to commissioning a new piece of equipment?
Ensure safety components are installed
When would you take base measurements on a new piece of equipment?
After maximum running time warm up
Toe boards must not be less than ____mm in height above a work surface on an elevated platform
140mm
Which pneumatic piping system uses the simplest form of piping?
Grid system
Electronic overspeed trips are typically used on
Turbines above 10000 RPM
What thickness of wire rope sling would be needed to lift a 2 ton load and what is the equation to figure this out?
1/2” (SWL in tons = D squared x 8)
What is used to stabilize a load?
Tag line
What is the normal approach to limit metal to metal contact on the start up of a turbine?
Slow-speed start
What can be used to align turbine parts?
Piano wire or laser alignment
Which turbine seal is made of rings of brass or stainless steal?
Labyrinth seal
Servo valves provide a ____ adjustment that is used to set the stop position of the valve
Null
Which valve requires only small power actuators?
Balance valve
How does the fluid travel in a fluid coupling>
From impeller to turbine
What would be the cause of a babitt bearing rolling around in its casing?
The lip/tab is broken off
What could the problem be if a fluid coupling is slipping under its normal load?
Low oil
In a gearbox what could be used to promote the passage of oil even though the box is filled with oil?
oil scrapers
What end of a shaft has the fixed bearing?
The drive end
How should a bearing be packed with grease?
1/3 full
What could the problem be if a diesel engine is emitting blue smoke?
Piston blow by, allowing oil to be burnt
What is the stroke on a four cylinder engine?
Suck, squeeze, bang, blow Intake, compression, ignition, exhaust
What is the firing order of a 4 cylinder engine?
1, 3, 4, 2 Just remember that you never want to throws next to each other to go off one after the other, this will keep them farther apart
At what cpm does misalignment occur?
2
At what cpm does unbalance occur?
1
At what cpm does mechanical looseness occur?
2
A bucket elevator is spilling its load, what could the cause be?
Slipping clutch
How large should the overlap be on a belt splice lap joint?
1 width of the belt
A reducer gear has a ratio of 2:1. The idler has 10 teeth, the drive gear has 90 teeth, how many teeth does the driven gear have?
180
What would you set the tension to on a new horizontal chain?
5%
How would the closed end on a spring clip be installed on a master link?
The closed end in the direction of travel
If a clutch has uneven wear, what could be the problem?
Misalignment
What is the most common type of misalignment
combination
On start up, what would you do if there is a vibration on the turbine?
Allow reading to settle out
How is turbine speed controlled?
Governor
Hydraulic motors cannot be used for valves requiring more than one turn to open and close (true or false)
False
When obtaining dial readings for cross dial, sag is ____ the B dial readings
Subtracted (suBtracted, Added)
A piston ring will have an end gap to
Allow for ring expansion
A flywheel is connected to the end of a crankshaft to
Absorb and smooth out pulses
The time required to send a signal pneumaticall is much greater than required to send it electrically (true or false)
true
What frequency does a velocity transducer measure?
600-60000CPM
When a bearing is being lubricated by an oil bath, how deep should the bearing be submerged in the oil?
1/3 to 1/2 up the lowest rolling element
A combination turbine has two blade stages, which one is the first stage?
Impulse
How would you permanently level a tank that was out of level?
Lift, level, shim, and grout it
What is the correct order to proceed in when you’ve taken a pump out of commission?
Clean, mark, strip, inspect
What would you use to check the wall thickness of an active pipe?
ultrasonic
Oscillating loads act on bearings in an arc less than ____ degrees
180
What is the safety factor for lifting workers?
10:1
The film under a reciprocating load is very thin, strong, and operates in _____ clearance than under a stationary load
A smaller
What is axial internal clearance in reference to a bearing?
The total amount of clearance between the rolling elements and the raceway when one bearing is moved AWAY from the other in the axial distance
A 9 gpm pump is supply fluid from a 3 gpm reservoir. The oil temperature is rising rapidly, what is the problem?
Reservoir is too small
What material should be used for skirting on conveyors?
Softer material than the belt with zero clearance
What is a way to remedy the problem of a conveyor tracking to one side when loaded?
Adjust the tail pulley
What is the component in a refrigeration unit that absorbs heat from the refrigerated space?
Evaporator
When a PLC has been used on a system the operation of that system can be changed by
Changing the control program
A type C bearing is a
CARB bearing
The only way that heat can transfer through solids is
Conduction
A common approach of selecting a test weight to produce an imbalance is to use a weight that is ____% that of the load
10%
A short flat conveyor belt is having difficult with tracking problems, what could be done to remedy the problem
Increase crown on tail pulley
What is the purpose of a snub pulley in a conveyor system
Adjust the arc of contact. Normal is 180, can be adjust up to 240
How would you test aluminum fan blades for defects
Eddy current
What safety device is essential when working with electrical equipment in wet conditions?
GFCI (ground fault current interrupter)
How would you repair an air leak on a compressor pipe flange?
Release pressure, lock out, change gasket, tighten flange
What tool is used to check the windings on an electric motor?
Megger or Megometer
What direction do you lock an eccentric collar on a bearing?
Same direction as shaft rotation
In what part of the circuit would a sequence valve go?
In the branch of the circuit you are controlling
The second stage of a two stage compressor overheats, what could be the problem?
Blocked intercooler fins
A 1 1/2 HP motor has a fan running at 1200 RPM. what HP motor would you use so the fan runs at 1800 RPM?
2.25 HP
A 50 HP engine has a fan running at 13000 RPM. What HP engine would you need for 26000 RPM?
100 HP
If the top part of a V belt is lower than the top of the sheave, this indicates
There is an increase in wear on the grooves in the sheave
What type of torque wrench could be used to measure the rolling resistance of a shaft?
Beam type
How many teeth per inch should a hacksaw have if it is used to cut thin walled tubing?
32
What helps distribute sealing liquid equally around the shaft?
Lantern Ring
When installed a blower, level the motor, then align the blower to the motor. (true or false)
False, install the blower and align the motor to the blower
What would be the controlling element in a “meter in - meter out” hydraulic circuit?
Flow control valve
The system that uses the number of teeth to each inch of pitch diameter on a gear is called the
Diametral pitch
The square jaw clutch can only be engage at speeds no greater than
9 RPM
A poly V-belt has a code of 8V480. The diameter is
48
When activated the clutch disc on a single friction clutch will be
Sandwiched against the pressure plate and the flywheel
A cylinder is extended and retracted during a normal cycle with everything else functioning properly. What would you observe?
Cylinder going faster on the retract stroke
The most common place to install a pressure line filter in a hydraulic system is
Discharge side of the pump
What is the minimum DCV that can be used for controlling a double acting cylinder
2 position 4 way single solenoid spring return
What would be the most common cause of vibration in a pump?
imbalance
Oil and grease on a clutch face will
Create slippage and chattering
The type of hammer that has a wedge shape perpendicular to the hammer handle is the
Cross- Peen
The part of the tooth that is a contact part but is located below the pitch circle is the
Flank of the tooth
External gear pumps are the best for handling abrasive material
False, two screw pumps are
In a balanced vane pump the vanes stay in position due to
centrifugal force
A centrifugal pump is pumping more fluid that what is needed, what could you do to adjust the flow?
Decrease the RPM
What would you add to a cylinder on the retraction stroke if it is hammering?
Increase cushioning on the cap end
Most manufacturers recommend that valve plates, rings and channels be resurfaced before replacing completely
True
What are the types of impeller design on a centrifugal pump?
Open, semi-open, closed
What valve is designed to allow oil to drain back to the reservoir and prevent hydraulic lock on the wet sliding vane compressor?
Oil relief valve
What term refers to the energy lose by the liquid as it goes through the piping?
Friction Head
What is the term for the force of a substance per unit of volume?
Density
If a double rod pneumatic cylinder drove erratically, what could be the problem?
Valve rod seal leaking
What could be the most likely problem of an air tool not working properly?
No air in the compressor
If you were loading a very dusty material onto a pneumatic conveyor, where would the most wear take place
The inside of the outside radius of the piping (on the bottom or the top of the long side radius?)
Most industrial compressors are single or double acting?
Double acting
Where is a hot work permit required?
Where there is a danger of sparks or heat
What do you measure with an accelerometer
60000 CPM or higher
Which balance is with amplitude and 180° out of phase
Couple imbalance
If you were to do a splice on a belt with smaller rollers, what angle would you do the splice?
22°
A plunge cutting endmill has teeth that ____ meet in the middle
Do
What is the function of a sag chart?
Used to compensate for sag in horizontal wire alignment
Clearance pockets change what on a compressor?
Capacity
What is a boring tool?
Used to cut the inside diameter
You align a pump and see that the couplings are touching at the top and have a gap on the bottom. What do you do to fix this?
Add shims to the front of the motor
A v-Belt continues to turn in its sheaves (rollover) what can you do to remedy the problem?
Replace the belt
A u-tube connected at right angles to the flow of air in a fan will measure____pressure only
Static
What is the disadvantage of using a tube axial fan?
Causes air to swirl, air movement causes a loss of energy, very noisy
What is the correct procedure for checking pipe strain
Mount two dials 90° apart on the MTBM
You are slinging a long load with two slings of 3.1 m each at 60° angle. What would the distance between the two slings be?
3.1 m
A tank that is being drained suddenly collapses, whats the problem?
Breather is plugged
What is necessary for every journeyman to do to to equipment when working on it together?
Personalized locks
What would you do if you find a sling that has been exposed to acid?
Destroy the sling
What piece on a compressor hold the compression packing and keeps the gasses from leaking out down the rod?
Distance piece
A liquid ring compressor can reach a vacuum of ____inches
29.92
Drill bit clearance angles are ground ____ the cutting edges
Beneath
The absolute scale that uses degrees celsius is the _____ scale
Kelvin
Welding on material that has been hardened and strengthened by any means will not destroy the effect of the strenghtening process used.
True or False?
False
A sling has been damaged during a lifting operation. What would you do?
Remove the sling from operation and destroy
Two slings are used in chocker hitches on a long load. How would you attach them to the crane hook?
By using shackles
How can you reduce the cross section size of the packing in a pump?
Roll it with a mandrel
Where is the lightest erosion on a steam turbine?
Low pressure section
What is the carbon content of 4140 steel?
0.40% carbon
When grouting over a concrete surfae the concrete surface should be roughened up and ____ before the grout is applied
Thoroughly dampened
What is the safety device on an acetylene tank?
Fusible plug, it is set to melt at 100°
A regulators (oxyacetylene) main function is to maintain a constant delivery pressure and
Reduce the source pressure to an operating pressure
What is the most common belt cleaning design?
V-Plow
How many days must anchor bolts be left for the concrete to reach its maximum strength?
28 days
What is the purpose of a wedge socket?
Used when a connection has to be changed regularly
When referring to arc welding, straight polarity is when?
Electrode is negative
What idler would you use when spillage is not a problem on a conveyor belt?
Flat belt idler
The hand are the threads on an acetylene tank?
Left hand
When referring to welding rods, 6010 has the tensile strength of
60000 psi
A 6010 electrode has a position of
All positions
What should the crown amount be on a conveyor belt?
1/8 per foot of pulley face width
Steel must not be tempered immediately after hardening
True or False
False
What is the reduced rope strength in percent when a splice is placed in a rope?
15%
To avoid the radiation hazard of radiography testing, workers should:
Stay a specific distance away
Span blocking is not recommended with cranes.
True or False
True
The wire rope clip saddle should be on which end of the wire rope?
Live end
A high particle count in an oil sample of a new gear box install is always an indication of gear failure
True or false
False
What is the most common type of desiccant in an absorbtion dryer?
Silica Gel
A electric motor tht shows an increase in current draw is an indication that the motor may be overloaded
True or false?
True
6 x 19 refers to what in a wire rope?
6 strands 19 wires per strand
What is the hand signal for “raise boom slowly”
Arm out with palm open and down, make a fist and point to the open palm with your thumb
Basket hitches have a rating of ___% compared to a single verticle hitch
200%
The function of an airline dryer is to reduce the ____ of the air
dew point
Which of the following is not a type of air and gas dryer?
Refrigeration Dryer
Absorption Dryer
Mechanical Dryer
Electrical Dryer
Electrical Dryer
Oil analysis is a key part in the condition monitoring of equipment
True or false?
True
What is the hand signal for “dog everything”
The crook between the thumb and forefingers of each hand should be interlocked in front of the signalman
Wire rope is measure across what?
Crowns
What is used to measure the temperature of a machine component?
Infrared pyrometer
As the temperature of air increases, the amount of water it can hold in the form of vapour decreases
True or false?
False
What is the ID of a 6205 bearing?
25mm
What is the hand signal for an emergency stop when lifitng a load?
Both hands extended, fingers stretched out
What type of air dryer uses a deliquescent?
Absorption dryer
The amount of energy needed to raise the temperature of 1 pound of water 1°F at STP is equal to ____ BTU/s
1
What is the first troubleshooting step?
Talk to an operator
A centrifugal pump that has sat on the plant shelf for a long period dies shortly after start up, what is the most likely cause?
False brinelling
What is the pressure required for a 6” diameter cylinder to push a 900 lb load?
31.83 psi
Where is the vibration pickup (transducer) on a gearbox placed?
As close to the bearing as you can
What is the definition of critical speed?
When the rotor rotates at or near the natural frequency
What is the first step to perform routine maintenance on mechanical equipment?
Isolate and lock all energy sources
What is required when working from heights?
Fall arrest equipment
What PPE is required when working in a high traffic area?
High visibility clothing
What type of tool is used to cut 16-gauge galvanized sheet metal?
Tin Snips
What is the procedure to drill a 1-in hole in a mild steel plate?
Make punch mark, drill pilot holes, drill final bit size
When using nylon web slings, which type of guard is used on sharp edges?
Personalized sleeves
Why is coolant or cutting oil used?
To eliminate heat build-up
What is done to prepare a vertical surface before using a mag drill?
Ensure surface is clean and smooth
Which tool is used to align rotating mechanical couplings?
dial indicator or a laser aligner
A conveyor belt is running out of line beneath a chute. what is the cause?
Belt tension is unbalanced
What is the included angle of a drill bit for general drilling?
118°
What is the procedure to replace an oil sight glass on a centrifugal pump?
Isolate, lock out, drain, then change
A diesel engine lacks power. What is the cause?
Valves are incorrectly adjusted
A manual operated pump jack fails to secure a load. What is the cause?
Leaking seals
What is an effect of shaft misalignment?
Vibrations and damages to components
A return oil tank is pressurized. what is the cause?
Plugged vent
A single stage compressor is functioning properly but fails to maintain required air volume. What is the cause?
Usage demand too high
A new blower fan is installed in a high temperature environment. What type of drive is required?
Direct drive
What type of tool would you use in an oxygen-enriched environment?
Anti-sparking tools
A compressor in a dirty environment does not operate correctly and constantly overheats. What is the cause?
Faulty tank input check valve
Internal components in pneumatic tools are rusting. what is the cause?
Moisture in the air system
A 36-in pipe wrench is used to rotate a mild steel pipe. The pipe wrench continuously slipps. What is the cause?
Material build up between the teeth
When welding mild steel plate with a 7018 rod, there is difficulty maintaining the arc. What is the cause?
Wrong polarity
