Modern Machine-Shop Practice Part 267

=Best water joint.=--What are the best kinds of joints for withstanding water pressure? II. 138.

=Fitting a f.l.a.n.g.e.=--In fitting a f.l.a.n.g.e to a boiler what part of the f.l.a.n.g.e face should bed most? II. 140.

=Rust joint.=--How are rust joints made? II. 140.

=Leaky plug.=--How would you test the fit of a leaky plug in a c.o.c.k? II.

144.

=Well-ground plug.=--What is the appearance of a well-ground plug? II.

145.

=Quick bra.s.s fitting.=--Describe the quickest method of fitting a new bra.s.s or bearing box to its journal. II. 147.

=Babbitt bearing.=--What is the princ.i.p.al advantage of a Babbitted bearing? II. 156.

=Adjusting guide bars.=--What two essential points are there in adjusting the bottom guide bars of an engine? II. 162.

=Setting guide bars.=--Describe roughly the method employed to set guide bars by means of a stretched line or cord? II. 163.

=Pounding journals.=--What are the two princ.i.p.al causes of the beating or pounding of the journals of an engine? II. 164.

=Locating a pound.=--How may the location of a pound be discovered? II.

164.

=Cause of pounding.=--What is the ordinary cause of beating and pounding in an engine? II. 164.

=Wearing down.=--What is the defect induced by letting the parts of an engine wear down to a bearing? II. 166.

=Testing alignment.=--What are the tests that should be made to find out what part of an engine is out of line? II. 166.

=Best test for alignment.=--What part of an engine can be used to form the best test of alignment to cure pounding? II. 167.

=Connecting rod alignment.=--State in a general way the method of using the connecting rod to place the engine in line, and thus prevent beating and pounding. II. 167 to 172.

=Difficult alignment.=--What error in the alignment of the parts of an engine is the most difficult to discover? II. 170.

=Alignment of crank pin.=--What is the general cause of a crank pin being out of line with the crank shaft? II. 170.

=Pound at quarter stroke.=--When a pound occurs in an engine at the time the crank pin is at quarter stroke, or thereabouts, where would you look for the cause? II. 170 to 172.

=Setting a slide valve.=--What are the three objects, either of which a slide valve may be so set as to accomplish? II. 173.

=Essentials of slide valve setting.=--What are the two operations essential to the setting of a slide valve? II. 173.

=Squaring a valve.=--Why is the common process of squaring the valve an improper proceeding? II. 173, 394.

=Crank pin on dead centre.=--How would you proceed to put an engine crank pin exactly on the dead centre for setting the valve? II. 173, 394.

=Direction of movement.=--What are the considerations that determine in which direction the engine should be moved when setting the valve? II.

173, 174, 394.

=Setting eccentrics.=--What tools are used to set eccentrics upon shafts before the shafts are upon the engine? II. 175.

=Patching a break.=--In patching a broken beam or frame, how may the bolts be made to serve to act as keys closing the crack? II. 178.

=Erecting shafting.=--Give a general or rough description of the method of adjusting or aligning or erecting shafting. II. 184 to 186.

=Kinds of shafting.=--What is the difference between bright and black shafting? II. 187.

=Fitting a pulley.=--If you had a pulley whose bore was 1-15/16 inches, what diameter of bright shafting would you order for it? II. 187.

=Locating collars.=--What is the best location for the collars that prevent end motion on a line shaft? II. 189.

=Ball and socket hangers.=--What are the advantages of hangers having a ball and socket adjustment? II. 192.

=Shaft couplings.=--What four objects should the couplings for line shafts accomplish? II. 194.

=Universal joint.=--What object does a universal joint accomplish? II.

199.

=Crowning a pulley.=--What is the object of crowning a pulley? II. 201.

=Pulley balance.=--Why should a pulley be balanced? What is a running and what a standing balance for a pulley? At what speed should a running balance be made? II. 202.

=Size of pulleys.=--If a shaft makes 150 revolutions per minute, and it is required to drive a pulley on a machine at 600 revolutions, what proportions must the diameter of the two pulleys have, and what determines the diameters of the pulleys? II. 205, 206.

=Testing belts.=--What appearance in leather belting indicates that it was cut from the spongy shoulder? II. 208.

=Stronger side of belts.=--Which is the stronger side of leather, the smooth or grain side or the rough or flesh side? II. 208.

=Placing a belt tightener.=--Should a belt tightener be placed on the tight or slack side of a belt? II. 210.

=Crossed vs. open belt.=--Which will transmit more power, an open or a crossed belt, and why? II. 210.

=Crossed belt.=--What are the objections to a crossed belt? II. 210.

=Shortening a round belt.=--Can a round twisted belt be shortened without removing either the hook or the eye and how? II. 216.

=Wide belt.=--How would you get a very wide belt on a pulley? II. 217.

=Mending an eccentric rod.=--Suppose an eccentric rod broke, and you were required to weld it again, what shape could you make the scarf for the weld? II. 234.

=b.u.t.t weld.=--What is a b.u.t.t or pump weld? II. 236.

=Scarf weld.=--Describe roughly the means you would employ to make a scarf weld. II. 235.

=Tongue weld.=--What are the shapes of the two pieces that come together in a tongue weld? II. 235.