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The two most common operations in the manufacture or fitting of parts are ___________of metal.CorrectIncorrect
To be able to manufacture and fit parts, you must be able to select and use files, select blades,and use a ________.
A typical engineer’s hacksaw has an ______________that will accept a range of blade sizes.CorrectIncorrect
For the best results,the blade should be carefully ____________ for the work. It must be fitted correctly,and the hacksaw must be used correctlyCorrectIncorrect
Hacksaw blades of different pitches are available. Teeth are specified per __________.CorrectIncorrect
The most commonly used pitch is the ____________, i.e. 18 teeth per 25 mmCorrectIncorrect
Coarse pitches such as 14 teeth per 25 mm (1,8 mm pitch) are best for cutting _______________CorrectIncorrect
________________ and thin gauge sections such as sheet or pipes are cut best with finer pitches such as 24 or 32 teeth per 25 mmCorrectIncorrect
When sawing thin material and pipe, the pitch must be sufficiently fine so that _______________ are always engaged in the workCorrectIncorrect
Cutting a work piece with a hacksaw
Clamp the work piece firmly in the vice and cut as far away from the vice as possible. This eliminates “chatter” and vibration which could lead to blade breakageCorrectIncorrect
The pressure on the forward stroke must remain constant to keep the cut even, therefore the body mass must be distributed evenly to stay balanced and in full control of the hacksaw. There must be no pressure on the blade on the return strokeCorrectIncorrect
Always cut on the right hand side of the vice if you are left-handed and on the left hand side if you are right-handed so that if the blade snaps, your hands will slip away from the vice and not into the viceCorrectIncorrect
Use the thumb of your left hand (if you are right-handed) to guide the blade until it starts the cutCorrectIncorrect
Apply enough pressure on the forward stroke to make the teeth cut. If there is not enough pressure, the teeth will slide over the workpiece and become bluntCorrectIncorrect
Do not release the pressure on the return strokeCorrectIncorrect
Remember, the blade cuts in both directionsCorrectIncorrect
Use the whole length of the blade and make about 40 to 50 strokes per minute. Cutting at a faster rate than this may cause enough heat to damage the temper in the teeth, so blunting themCorrectIncorrect
The teeth are set to move freely in the cut. Should a blade break or become blunt before completing a cut and a replacement is necessary, it is recommended to continue with the same cut.CorrectIncorrect
As a blade goes blunt the slot made by the blade become narrower. To continue the cut in the slot will no effect on the new blade.CorrectIncorrect
Never rotate the work and start a new cut from the other side.CorrectIncorrect
Start a new cut next to the first cut if the material cannot be rotated.CorrectIncorrect
When the blade has almost cut through the material, support the piece of material being cut with your hand to prevent it from dropping when the cut is completed.CorrectIncorrect
Release the tension on the blade before you replace the hacksaw in your toolbox. This prevents the frame of the hacksaw losing its springCorrectIncorrect