2 - Workshop Practices

Question 1

A ‘light drive’ fit for a 3/8 inch diameter bolt has a maximum allowance of?

Answer 1

0.0006 inch.

Question 2

The intervals for calibration of test equipment?

Answer 2

Are different from one appliance to another.

Question 3

What drill angle is used to drill titanium?

Answer 3

105-120 degrees.

Question 4

When tightening a nut on a bolt, the torque loading applied is?

Answer 4

The tangential application of the force times the perpendicular distance from the point of application to the centre of the bolt.

Question 5

The UK standard of limits and fits is?

Answer 5

BS4500.

Question 6

When using a Pacific tensiometer, the correct tension is found by?

Answer 6

Comparing reading to chart provided.

Question 7

What temperature should the heat gun be set for shrinking heat shrink sleeve?

Answer 7

100°C above rated temperature.

Question 8

Calibration of aircraft hydrostatic weighing equipment is?

Answer 8

Done once a year.

Question 9

When drilling light alloy, what lubricant should be used?

Answer 9

Use the specified lubricant.

Question 10

A torque wrench with an extension should be set to what reading to apply 350 lb.in?

Answer 10

280 lb.in.

Question 11

Reaming light alloy tube is done with?

Answer 11

The same oil and lubrication as used for cutting.

Question 12

Tolerance is defined as?

Answer 12

The allowable error due to faulty workmanship and tools.

Question 13

What should be done if a tool is found not to be working to its calibrated requirements?

Answer 13

It should be removed from service, marked as unserviceable, and sent away for overhaul.

Question 14

When carrying out soldering to an end termination and a wire, you should tin?

Answer 14

Both the end of the wire and the termination.

Question 15

Run-out of a rod is measured using?

Answer 15

DTI, surface plate, and V-blocks.

Question 16

How would you mark a defect on an exhaust system?

Answer 16

Chalk.

Question 17

Which is the most appropriate filing technique?

Answer 17

Pressure forwards, relieve pressure backwards.

Question 18

Stubborn pins in file teeth should be removed by?

Answer 18

Pricking out with a sharp point.

Question 19

When using low tungsten hacksaw blades, the recommended strokes per minute is?

Answer 19

50 strokes per minute.

Question 20

Units of torque are?

Answer 20

lbs.ft and lbs.in.

Question 21

If the calibration of a piece of test equipment is suspect, your actions should be?

Answer 21

Remove from service and annotate accordingly.

Question 22

What should you check before using a set of V blocks?

Answer 22

That both blocks have the same identification stamps.

Question 23

When turning the handle on a Megger with the probes kept apart, the needle should?

Answer 23

Stay at infinity.

Question 24

On a hollow tube, where would a small indentation normally be unacceptable?

Answer 24

In the mid 1/3 section.

Question 25

What type of grinding wheel would you use to sharpen an HSS drill bit?

Answer 25

A fine wheel.

Question 26

When using a reamer, what lubricant should be used?

Answer 26

The same lubricant as was used on the drill bit.

Question 27

How many teeth per inch are used on a hacksaw blade for cutting hard metal?

Answer 27

26 TPI.

Question 28

How many strokes per minute are used on a hacksaw when cutting thick metal?

Answer 28

55 strokes per minute.

Question 29

How can a component be protected from damage by a wire rope sling?

Answer 29

By using spreader bars and packing.

Question 30

What are the colors of gas bottles for CO2, air, and acetylene?

Answer 30

Black, grey, maroon.

Question 31

What is the correct starting procedure to drill a 1/4-inch hole in titanium?

Answer 31

Centre drill first.

Question 32

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?

Answer 32

240 lb.in.

Question 33

When torque loading a castellated nut on an undrilled new bolt, what should be done?

Answer 33

Apply torque and then drill the bolt for the split pin.

Question 34

How is a reamer with spiral flutes removed?

Answer 34

Clockwise.

Question 35

What is the difference between high and low limits of a dimension called?

Answer 35

Tolerance.

Question 36

How should rubber components be stored?

Answer 36

In a cool, dark area.

Question 37

When drilling stainless steel, what speed and pressure should be used?

Answer 37

Lower speed with more pressure.

Question 38

What included angle should a drill for stainless steel have?

Answer 38

140° and turn at a low speed.

Question 39

What is the typical drill size used for stop drilling a crack?

Answer 39

0.125 inch.

Question 40

If no trichloroethylene is available, what can be used to degrease aluminum alloys?

Answer 40

White spirit and naphtha.

Question 41

How is a grinding wheel normally refaced?

Answer 41

By dressing with a special tool.

Question 42

A torque wrench is 15 inches long. What load is needed to apply 120 lb.in of torque?

Answer 42

8 lbs.

Question 43

How is the setting of an adjustable reamer checked?

Answer 43

With a ring gauge.

Question 44

What lubricant should be used when drilling brass?

Answer 44

None.

Question 45

In the Limit System, what does 'allowance' refer to?

Answer 45

The difference between shaft and hole diameters.

Question 46

What is correct when using a file?

Answer 46

Apply pressure only on the forward stroke, except for soft metals like lead or aluminum.

Question 47

What is the correct procedure when using a reamer?

Answer 47

Turn the reamer only in the cutting direction.

Question 48

What type of tolerance is '1 in. +0.002 -0.001'?

Answer 48

Bilateral.

Question 49

How should a scraper be finally sharpened?

Answer 49

On an oil-stone.

Question 50

How is a D.T.I. (dial test indicator) initially set up?

Answer 50

The gauge plunger should be partly depressed and the needle zeroed.

Question 51

How should nickel alloy chisels be sharpened?

Answer 51

On an oilstone.

Question 52

What lubricant should be used when drilling aluminum?

Answer 52

Paraffin.

Question 53

How are spring dividers sharpened?

Answer 53

By stoning the outside of the points.

Question 54

What happens if a twist drill has insufficient clearance angle?

Answer 54

It would cut slowly, if at all.

Question 55

How is a tolerance indicated on a dimension?

Answer 55

By a plus and minus sign preceding the permitted tolerance.

Question 56

How much material should be left for reaming?

Answer 56

0.003 inches.

Question 57

After cutting a 3/8-inch BSF internal thread and finding the stud too large, how is a fit achieved?

Answer 57

Re-adjust the die and re-cut the male thread.

Question 58

How should a reamer be removed after reaming a hole in titanium?

Answer 58

Remove it in the same rotation as cutting.

Question 59

Why are some components torque loaded?

Answer 59

To ensure that their elastic limit is not exceeded.

Question 60

When using a reamer, in which direction should it be turned?

Answer 60

Clockwise when cutting and removing.

Question 61

What kind of finish does draw filing produce?

Answer 61

A fine finish.

Question 62

Where is the safe edge of a file used?

Answer 62

Against a finished surface.