THREE:(1.) How may gauging implements affect the division of labour?(2.) In what way do standard dimensions affect the value of machinery?(3.) Why cannot cylindrical joints be fitted by trying them together?(4.) Under what circumstances is it most important that the parts of machinery should have standard dimensions?(5.) Which sense is most acute in testing accurate dimensions?(6.) How may slight variations in dimensions be made apparent to sight?(1.) In comparing steam-hammers with trip or crank hammers what mechanism does steam supplant or represent?(2.) What can be called the chief distinction between steam and other hammers?(3.) Under what circumstances is an automatic valve motion desirable?(4.) Why is a dead or uncushioned blow most effective?(5.) Will a hammer operate with air the same as with steam?