Red Seal Exam Practice Flashcards
What is the ladder ratio
4:1
Worm and worm gear changed often ( wears often) What should be done?
change to double-throated
40 ft base has a guy line 35 ft high. how long while your rope is required
53.15
what is the formula to find the hypotenuse of a triangle
a squared plus b squared equals c squared
a squared + b squared = c squared
engineered chain conveyor take ups won’t take all the slack. What needs to be done?
remove links in chain
conveyor skips teeth, what needs to be done
tighten tension idler
Pneumatic conveyor transporting fibrous material. what type of impeller is required?
Open Face
how is it proper to do initial tracking of belt
Empty
two leg bridle swl rope 3,000 lb slings 5 ft long, height from load to hook 10 ft. what is the system capable of lifting
4000 lb
45,000 lb turbine rotor needs to be lifted using spreader bar and basket sling what is the swl of the slings required
12,000 lb
pump shaft 12 in from base, initial temperature 70° f, operating temperature 180° fahrenheit, coefficient of expansion zero decimal 0.0000063. Find E
0.008316
On a Pneumatic motor a solenoid operated dcv is de energized but motor keeps on turning, what needs to be done?
Replace spring in dcv
what wire rope is required on a high-speed Crane or a chrome that has multiple reeves
6x37
angle of tip to cut thick Metal with oxy acetylene torches
45° angle forward
18 in diameter Outrigger block padding should be at least three times bigger an area what is the area of blocking required?
763.14
in an internal combustion engine what is done to prevent sludge buildup
detergent oil
Test to check overloaded bearing
dye penetrant
test to check overheated bearing?
Thermography
Newly installed taper roller bearing overheats due to not enough clearance, where should shims be added?
under the plate bolted at the end of the shaft( not under the cover) because cover holds race at the bottom of the cavity and the plate at the end of the shaft pushes the bearing into the race
between outer cover and housing
a newly installed roller bearing is overheating, what is the cause
not enough clearance
multiple bearing points in the same system are equipped with thermocouples, every Point indicate high temperature, what should be done
more flow of oil
what should be done to a pillow block bearing casing halves after it has been bored to prevent distortion of bearings
relieve it
oil pressure and reciprocating compressor is still excessive after changing oil filter for another of the same Micron rating, what is the cause?
blocked Passage
what is used to measure pressure difference across a filter in a ventilation system?
Manometer connected to both sides of the filter
What type of ventilation to vent a confined space with only one opening?
ducting to furthest point in the space
document required to enter a tank or a container
confined space permit
Sequence valve fails to open what is done to fix it
unblock drain line
reciprocating compressor keeps tripping Breakers at startup, what needs to be done?
adjust unloader valves
pneumatic diaphragm pump fails to deliver flow at output even when diaphragm is in good condition, why?
pump Centerline located too high from suction point
drawing with chart for Crane without riggers, length of boom, angle of boom, and radius. what is the safe working load?
look in the chart
Fusible plug on fluid coupling on a turbine melts,
low speed
type of imbalance from a keyway cut in a shaft
Dynamic
conveyor has been repaired and is ready to return online, Why won’t it energize?
emergency cord tripped
When adding a new gear reducer on a conveyor, what is the first step?
measure distance between components
datum point is at 210.50”, base plate average height is at 80.25”, what is the elevation of the base plate?
130.25 ( subtract)
Using a scope, what reading indicates highest bearing?
9.615”
what is the proper procedure to place piano wire
established datum points, string wire, set base plate
15,000 CFM fan only creates 12,000 CFM with a 25 HP motor, what HP is required to produce 15,000 cfm?
31.25HP
What is the pressure required to lift 1,000 lb load, diameter 4”
12.566 square inches
cylinder extends but won’t retract why?
low pressure
a new dcv installed on a single acting hydraulic cylinder. cylinder now extends without touching dcv why?
normally closed valve is in the open position
Fan in an induced ventilation system vibrates why?
build up
when going out to check on a conveyor, what is an indication that the breaker has been tripped?
backstop clutch activated ( not running)
what type of oil is used in reciprocating compressor
non detergent
how do you fix a tear in heavy duty belt?
drill holes, metal plate
what should be done first when you are leveling a base plate?
figure out ratio between level and base
figure out ratio between level and base
base is aligned and level and torque bolts at 50%
What is the first step for proper installation of horizontal split ( blower) and motor after datum lines and center lines have been established?
position sole plate
how do you fix a deformed disc on a disc brake system?
Lathe
you notice a roller chain is stretched during removal what should you do?
replace sprockets, replace chain, tighten
what do you do when the V belt whips?
Tighten
what is the product of an imbalanced shaft?
bearing failure
What is monitoring vibration analysis
Amplitude
what is the main purpose of preventative maintenance?
reduce production cost
what is the proper way to start machine for first time if you don’t have any manufacturer specs
check oil levels, jog
what is the proper way of changing a faulty air relief valve on a compressor receiver after compressor has been locked out?
bleed off receiver and change relief
sling rubs against framing during a lift what should be done as soon as the lift is done?
inspect sling
During a lift, one of the hydraulic jacks is noticed to be leaking. what should be done as soon as the load is off?
tag and send for pressure testing
where can information on safe operating temperature for equipment be found if you don’t have the manufacturer books?
name plate
during a pre-lift inspection, a come along is noticed to have a sticky raise - lower lever, what should be done?
tag and send for repairs
in modern industry where is oil analysis information stored
computerized maintenance system
when filling a tank it does not fill to preset amount, why?
plugged vent
you have a 50 inch diameter drum how long will the Rope do you need to do three dead wraps on the drum?
471”
What is used for a quick fix of a warrant shaft at lip seal location?
use Speedy sleeve
what should be done to permanently fix a warrant shaft because of a loose bearing fit?
build up and machine
what valve is fully opened on oxy acetylene torch?
oxygen cylinder
pressure gauge is located at discharge on a compressor and it spikes higher than what it should be, what is the cause?
blockage further down the line
after changing a filter in a hydraulic system there is some noise in the lines at startup, why?
Aeration
Mechanical seal has cooling water during startup, when is cooling water turned on?
before startup
what is the proper way to adjust compression packing?
Full stream, tighten until slight drip
motor on a pump runs with a high amperage, what would be the cause?
packing too tight
pump has too much head pressure, how can it be fixed?
machine impeller
what is the proper way to set clearance on open face and color?
to manufacture spec
what is the proper way to store a bottle jack?
fully retracted and load de-energized
How do you store a torque wrench?
tension relieved
a stationary diesel engine overheats on a hot summer day, what is the problem?
fins on radiator are damaged
a seal is installed on a piston inside of a boar, it needs to seal inside the cylinder walls and the Piston outer diameter, what type of seal is it?
Balanced
what is the instrument used to check backlash on Gears?
dial indicator
After taking plane bearing cap off, what is the method to measure clearance?
plasti gauge, torque, remove, measure
What is the width of Woodruff key compared to shaft size?
1/4
a gradual increase in vibration over a long period of time indicates what?
normal wear
what is done when greasing to prevent contamination?
clean nipple and applicator
What type of gap would be used to weld vertically?
Short arc
When draining condensation water from Air receiver tank why is it considered hazardous material?
it contains oil
Belt deflection for every inch of span
1/64
How do you install taper bore ball bearings?
tighten until slight drag is felt
An impact wrench doesn’t work what do you do?
take it apart, clean internals, lube, put it back together
fan with a torque converter is not running to full capacity what should be checked first?
fluid in torque converter
Sequence of events to disassemble diesel engine
take apart, clean, inspect
what type of Jack should be used to hold a load?
Screw
what is used to lift a turbine rotor?
Spreader bar
What is the proper procedure to change compression packing?
pull old packing, flush, check shaft for wear, install new packing and Lantern ring, tighten
6 ft base plate and level is 2 ft long it is set long ways on the plate, level needs 0.006 in under one end of it to level, how thick should the shims be under the end of the plate?
0.018”
Find the weight of a stack of 35 steel plates one half inch thick, 4 ft wide, 8 ft long, weight of Steel is 490 pounds per foot
22,866.66 lb
gearbox shaft seal is leaking why?
plugged vent
job coupling premature failure why?
Misalignment
one part of the conveyor belt is always running off why?
a bad splice
gauge blocks on Surface plate, what should be the first thing you do?
clean surface
pressure reducing valve fails to deliver enough pressure why?
broken spring
Two plates different diameters. how to center end to end?
large diameter mine a small diameter and what is left divided by 2 will tell you how much they should be offset
how to clean a respirator?
Dry soft cloth and alcohol
chain fall covered in grease what do you do?
clean with Rag and solvent
what do you need to do when you need to go inside of a diesel engine?
ensure crankshaft can’t rotate
what do you do before connecting pump to motor?
check motor for proper rotation
