The Washington herald., 1921-11-20

o. Is 1t good practice to stop en-
CINE by using the choke, therby
! flooding it, instead of shutting OF
| spark?
A. The practice you mention is all
right as it prepares the cylinder.
| for easy starting. However, one
is very liable to neglect to turn
off the ignition switch when stop
, ping the engine in this manner
thereby running chances OF burn
ing out the ignition coil. Should
! say the conventional way of stop
ping the engine. that is using the
| ignition switch.
Q. What is meant by high test
gas and what do the figures S. and
| 70 mean in this connection?
A. High test gas is a measure OF
its specific gravity. The figures in
dictate the value of the gravity.
Baume's hydrometer Is usually used
! for lighter than water liquid and
is graduated in equal divisions from
ten to seventy. These figures can
be converted into the conventional
gravity readings by consulting
tables or formulas. Si1ty-fve de-
grees Baume is equal to a SPECIFIC
gravity Of 0.72S.
Q. The other day / noticed an
automobile proceed and turn to the
right at a street intersection while
the stop signal was displayed. Is
this correct?
A. Yes. Make a right hand turn
regardless of the signal displayed.
Q. What is meant by standard
gear shipt? And will you please
name few cars that use it,
A. The move of a standard gear
shift is as follows: Reverse. left
forward; first. left rear; second.
right front; third. right rear. Cars
using this shift. Cadillac. Paige.
Studebaker. WHY'S knight. Oak
land, Nash, etc.
Q. What dangers arise from stone
bruises on tires?
A. Stone bruises are caused by
the tire striking a stone at a high
rate of speed. resulting in one
or more layers of fabric breaking.
yet tread may not even be cut.
Inner tube works into this break
and a blowout usually results.
Q. What precautions should be
taken in making a right hand turn?
A. In making a right hand turn
one should always stay as close as
practical to tn ecurb. avoiding any
tendency to veer to the left in pre-
pairing to make this kind of a turn.
Q. Is there any systematic way
in which one can determine quick
ly the cause of an engine refusing
to start?
A. First determine whether a
spark is being delivered at the
spark plugs by the usual screw
driver or hammer method. With
good compression and gasoline in
the cylinders engine should start;
therefore, squirting a supply of
gasoline directly into a cylinder
head through pet cock or spark
plug openings should supply this
need. If engine does start and
runs only for a few seconds. the
trouble is undoubtedly somewhere
in the gasoline supply.
Q. What will happen if the muf-
fler is too small or gets dirty?
A. Decided loss of power Will re-
suit. Instead of the exhaust gases
passing completely out into the
atmosphere they choke up in the
muffler and back into the cylinder )
mixing with the incoming fresh
charges, thereby deadening effec-
tiveness of the explosions.
Q. What precautions should be
taken before attempting to adjust
a carbureter?
A. A satisfactory carbureter ad-
justment cannot be secured unless
a number of other conditions are
correct. Ignition and valve timing,
Of course. should be accurate. All
connections should be carefully
checked for air leaks. The ad-
justmnt of a carbureter is COM
paratively simple. Checking the
accurateness of the conditions mem
toned requires even more skill and
patience.
Q. VIII you please tell me the
proper proportions OF water and al
cohol to use to prevent the water
from freezing in the radiator?
A. Wood alcohol and water should
be used in the following proper
lions: 10 degrees above zero. so
per cent water, 20 per cent alcohol;
zero. rs per cent water. 25 per cent
alcohol: degrees below zero, 70
per cent water. so per cent alcohol;
20 degrees below zero, so per cent
water. 40 per cent alcohol. II de-
natured alcohol is used increase
percentage in above table by ap-
proximately is. For evaporation
use rs per cent alcohol to IS per
cent water-as the alcohol evap-
CRATES quicker. This does not ap-