=Injector.=--What is an injector? II. 395.

=Before firing.=--What should be done before laying the fire? II. 400.

=Kindling the fire.=--How long should the wood burn before putting on coal? II. 400.

=Oiling.=--What points require examination when oiling the engine? II.

401.

=After oiling.=--What points would you move after having oiled the engine? II. 401.

=Using tallow.=--Where would you place tallow in oiling the engine, and for what purpose would you use it? II. 401.

=Fire too hot.=--What would you do if steam was rising too rapidly? II.

401.

=Link position.=--Where should the link be when starting the engine? II.

402.

=Even steam pressure.=--Why should the steam pressure be kept up, and what difference does it make in the consumption of the fuel? II. 402.

=Quick steaming.=--Can steam be made quickest with a large or with a small quant.i.ty of water in the boiler? II. 402.

=Best boiler feed.=--Which is better, a constant or an intermittent boiler feed? II. 402.

=Best firing.=--Which is better, heavy firing at long intervals or light and frequent firing, and why? II. 402.

=Broken cylinder cover.=--What would you do if the cylinder cover got knocked out while on the road? II. 402.

=Hot piston rod.=--What would you do if the piston rod got hot? II. 403.

=Broken piston rod.=--What if the piston rod broke? II. 403.

=Broken crank-pin.=--What if the crank-pin broke? II. 403.

=Tire off.=--What if a wheel tire came off? II. 403.

=Driving wheel off.=--What if a driving wheel came off? II. 403.

=Broken lifting link.=--What if a lifting link or saddle-pin broke? II.

403.

=Slipping eccentric.=--What if an eccentric slipped? II. 403.

=Hot axle-box.=--What if an axle-box got hot? II. 403.

=Broken spring hanger.=--What if a spring or spring hanger broke? II.

403.

=Bursted tube.=--What if a tube bursted? II. 403.

=Fitting axle-box wedges.=--In what position should the engine be placed when the axle-box wedges are to be adjusted for fit to the pedestals?

II. 404.

=Changing clearance.=--What is it that, as the engine wears, tends to alter the amount of clearance? II. 404.

=Crank-pin centres.=--How would you get the distance from centre to centre of the crank-pins when adjusting the axle-boxes and the side rods, parallel rods, or coupling rods, as they are promiscuously termed?

II. 404.

=Adjusting Shoes.=--In what position would you place the crank when adjusting the shoes or wedges of the axle-boxes? Why is this adjustment important? II. 404.

=Force, pressure, and power.=--What is the difference between force or pressure and power? II. 405.

=Increase of power.=--Can we increase a given amount of power by means of mechanical appliances? II. 405, 406.

=Speed vs. power.=--Is a gain in speed a loss in power? II. 405.

=Lever.=--Explain the principle of the lever. II. 405.

=Elements of power.=--What are the three elements composing power? II.

407.

=Horse-power.=--What is a horse-power as applied to steam-engine calculations? How would you calculate the horse-power of a steam engine?

II. 407.--Give a method of testing the effective horse-power of an engine. II. 408.

=Safety-valve problem.=--A safety valve is three inches in diameter; the lever is twenty-eight inches long from the point of suspension of the weight to the pivoted end of the lever; the valve pin is four inches from the pivot; the weight is twenty pounds. What is the greatest pressure of steam the valve will hold, leaving the weight of the valve and of the lever out of the question? II. 409.

=Thermal unit.=--What is the heat unit or thermal unit? II. 410.

=Latent heat.=--Is all the heat in steam or water shown by a thermometer? What is the latent heat of water? What is the latent heat of steam? II. 410.

=Sensible heat.=--What is the sensible heat of steam? II. 410.

=Total heat.=--What is the total heat of steam? II. 410.

=Heaviest water.=--At what temperature is water at its greatest density?

What is the weight of a cubic foot of water when at its maximum density?

II. 410.

=Heat of boiling water.=--What determines the temperature at which water will boil? II. 410.

=Heat of steam.=--Can steam be made hotter than the water while they are in contact? What is superheated steam? II. 410.

=Absolute pressure.=--What is meant by the absolute pressure of steam?

II. 411, 416.

=Dry steam.=--What is meant by dry steam? II. 411.

=Weight of steam.=--Is there any difference between the weight of water and that of the steam it will evaporate into? II. 411.