2 - Workshop Practices Flashcards
A ‘light drive’ fit for a 3/8 inch diameter bolt has a maximum allowance of?
0.0006 inch.
The intervals for calibration of test equipment?
Are different from one appliance to another.
What drill angle is used to drill titanium?
105-120 degrees.
When tightening a nut on a bolt, the torque loading applied is?
The tangential application of the force times the perpendicular distance from the point of application to the centre of the bolt.
The UK standard of limits and fits is?
BS4500.
When using a Pacific tensiometer, the correct tension is found by?
Comparing reading to chart provided.
What temperature should the heat gun be set for shrinking heat shrink sleeve?
100°C above rated temperature.
Calibration of aircraft hydrostatic weighing equipment is?
Done once a year.
When drilling light alloy, what lubricant should be used?
Use the specified lubricant.
A torque wrench with an extension should be set to what reading to apply 350 lb.in?
280 lb.in.
Reaming light alloy tube is done with?
The same oil and lubrication as used for cutting.
Tolerance is defined as?
The allowable error due to faulty workmanship and tools.
What should be done if a tool is found not to be working to its calibrated requirements?
It should be removed from service, marked as unserviceable, and sent away for overhaul.
When carrying out soldering to an end termination and a wire, you should tin?
Both the end of the wire and the termination.
Run-out of a rod is measured using?
DTI, surface plate, and V-blocks.
How would you mark a defect on an exhaust system?
Chalk.
Which is the most appropriate filing technique?
Pressure forwards, relieve pressure backwards.
Stubborn pins in file teeth should be removed by?
Pricking out with a sharp point.
When using low tungsten hacksaw blades, the recommended strokes per minute is?
50 strokes per minute.
Units of torque are?
lbs.ft and lbs.in.
If the calibration of a piece of test equipment is suspect, your actions should be?
Remove from service and annotate accordingly.
What should you check before using a set of V blocks?
That both blocks have the same identification stamps.
When turning the handle on a Megger with the probes kept apart, the needle should?
Stay at infinity.
On a hollow tube, where would a small indentation normally be unacceptable?
In the mid 1/3 section.
What type of grinding wheel would you use to sharpen an HSS drill bit?
A fine wheel.
When using a reamer, what lubricant should be used?
The same lubricant as was used on the drill bit.
How many teeth per inch are used on a hacksaw blade for cutting hard metal?
26 TPI.
How many strokes per minute are used on a hacksaw when cutting thick metal?
55 strokes per minute.
How can a component be protected from damage by a wire rope sling?
By using spreader bars and packing.
What are the colors of gas bottles for CO2, air, and acetylene?
Black, grey, maroon.
What is the correct starting procedure to drill a 1/4-inch hole in titanium?
Centre drill first.
A torque wrench has a handle length of 12 inches and an extension of 3 inches. The desired torque is 300 lb.in. What should the dial read?
240 lb.in.
When torque loading a castellated nut on an undrilled new bolt, what should be done?
Apply torque and then drill the bolt for the split pin.
How is a reamer with spiral flutes removed?
Clockwise.
What is the difference between high and low limits of a dimension called?
Tolerance.
How should rubber components be stored?
In a cool, dark area.
When drilling stainless steel, what speed and pressure should be used?
Lower speed with more pressure.
What included angle should a drill for stainless steel have?
140° and turn at a low speed.
What is the typical drill size used for stop drilling a crack?
0.125 inch.
If no trichloroethylene is available, what can be used to degrease aluminum alloys?
White spirit and naphtha.
How is a grinding wheel normally refaced?
By dressing with a special tool.
A torque wrench is 15 inches long. What load is needed to apply 120 lb.in of torque?
8 lbs.
How is the setting of an adjustable reamer checked?
With a ring gauge.
What lubricant should be used when drilling brass?
None.
In the Limit System, what does ‘allowance’ refer to?
The difference between shaft and hole diameters.
What is correct when using a file?
Apply pressure only on the forward stroke, except for soft metals like lead or aluminum.
What is the correct procedure when using a reamer?
Turn the reamer only in the cutting direction.
What type of tolerance is ‘1 in. +0.002 -0.001’?
Bilateral.
How should a scraper be finally sharpened?
On an oil-stone.
How is a D.T.I. (dial test indicator) initially set up?
The gauge plunger should be partly depressed and the needle zeroed.
How should nickel alloy chisels be sharpened?
On an oilstone.
What lubricant should be used when drilling aluminum?
Paraffin.
How are spring dividers sharpened?
By stoning the outside of the points.
What happens if a twist drill has insufficient clearance angle?
It would cut slowly, if at all.
How is a tolerance indicated on a dimension?
By a plus and minus sign preceding the permitted tolerance.
How much material should be left for reaming?
0.003 inches.
After cutting a 3/8-inch BSF internal thread and finding the stud too large, how is a fit achieved?
Re-adjust the die and re-cut the male thread.
How should a reamer be removed after reaming a hole in titanium?
Remove it in the same rotation as cutting.
Why are some components torque loaded?
To ensure that their elastic limit is not exceeded.
When using a reamer, in which direction should it be turned?
Clockwise when cutting and removing.
What kind of finish does draw filing produce?
A fine finish.
Where is the safe edge of a file used?
Against a finished surface.
