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 principal 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].