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
