A. Yes, very much more.

60. Q. How would you prevent injector feed pipes or tank hose from
freezing in winter when not in use?

A. The steam valve should be slightly open to permit a slight
circulation of steam through the feed and branch pipes. The heater cock
should be closed and the drip cock under the boiler check or on the
branch pipe should be opened to insure a circulation of steam through
the branch pipe.

61. Q. How would you prevent the overflow pipe from freezing with a
lifting injector?

A. The overflow valve should be opened just enough to permit a little
steam to escape through the overflow pipe to prevent it from freezing.

62. Q. Name the various parts of the injector.

A. The injector consists of a body supplied with a steam valve, a steam
nozzle, a primer, a combining tube, a delivery tube, a line check valve,
an overflow valve, a water valve, and a lifting injector has a lifting
tube.

63. Q. What may be done if a combining tube is obstructed?

A. The steam valve bonnet may be removed and the obstruction forced out
with a piece of stiff wire, or uncouple the delivery pipe from the
injector and unscrew and remove the tubes; the obstruction can then be
removed and the tubes replaced.