Evening star. [volume] (Washington, D.C.) 1854-1972, 1920-07-18
QUESTIONS AND ANSWERS
FOR THE AUTOMOBILES

radiator may result, due to pressure
Of the steam from the boiling water.
2. Almost any insurance agency will
allow a discount for the addition OF
approved bumpers to an insured car.
The usual amount of discount is 10
per cent Of the insurance premium
deducted for the front bumper. and
IN per cent for the rear.
3. The angle Of taper usually used
for friction surfaces OF q cone clutch
IL 1914 degrees. This angle is used be-
cause a taper more gradual would
tend to cause the cone to wedge IN
it's engaging member and cause dit
ficult releasing. A more abrupt taper
would cause slipping, unless very
strong springs were used to hold the
clutch together. Springs Of the re-
Quired strength would call fof too
much pressure to release the Gluten.
4. The first practical automobile en-
CINE was invented in France in 1884.
s. Jerky operation of the foot ac-
celerator by a beginner Ii common
occurrence. Construct rest below
the foot lever upon which the ball OF
the foot may be placed. Keeping the
foot upon this rest to steady it and
applying with the toe of the shoe the
amount Of pressure needed is one
way to insure smoother operation.
s. If you find it Impossible to drive
the car out of ruts in a slippery clay
road, and the wheels merely spin in
one spot, do:ft continue spinning the
wheels. Disengage the gears or shut
off the engine, jack up the rear end OF
the car and place a fiat stone or
board under each wheel, or fill in the
ruts with stones. The wheels will
then gain traction sufficient to move
the car from the spot. The use OF
on side slope. Keep in the center
Of the road.
z. 1t is not advisable to use dry
cell, which shows an ameter reading
of only eight amperes. The cell OF
SO low an amperage should be re-
stin weaker and be of very little use.
s. Two advantages OF block casting
of water cooled cylinders are more
compactness and q stronger engine.
The engine can be made shorter with
this cylinder arrangement, and cast
ing en- bloc reinforces the engine
base.
9. The following parts when loose
will create slaps or knocks within the
motor: Wrist pin, loose in piston or
connecting rod. too small q piston. or
worn cylinder, worn or broken piston
rings. bent connecting rod, worn or
loose crank pin bearing for connect
ing rod. crank shaft bearings loose.
worn or too tight; wrist pin not in
line with crankshaft, valve pushfod
worn or bent or its guido worn. bent
or sticking valve stem. worn cams,
bent camshaft or it's bearings worn,
loose fiywheel. timing gears worn or
loose on shaft or teeth broken, loose
cylinders, loose engine or frame,
valves out of adjustment or valve
striking bottom of spark plug, mag
neto, generator or water pump drive
couplings loose or out of alignment.
fan out of true, loose. or fan belt
poppocfi striking som hing
10. A good average speed to give
best results in mileage and comfort
on trip is from twenty to twenty
Ave miles per hour. Excepting through
towns and communities, this rate Off
speed is within the law. and II main
tanned continuously as possible will
cover more miles with less wear on
the machine than constant opening
and closing of the Throttle. Because
of traffic conditions or regulations a
driver cannot maintain a high speed
for any length Of time with safety
to the car or its passengers.
This Weeks Questions.
/. What is the usual cause Of loss
of compression in a motor?
2. When an engine exhausts. what is
the cause of the sharp noise heard at
through the cutout when open?
g. What is the mileage capacity of
q motor truck during its entire life?
1. What is the practical method
usually used in removing the termi-
nal OF q storage battery?
5. OF what parts is the automobile
engine carburetor composed, and
what is it's operation?
g. What ignition troubles will cause
a. motor to knock?
Z. On what is the insurance system
for automobiles based as figured?
8. Is a transmission brake of ad-
skid? What are methods for stopping
a skid, which can be used by the
driver in any car?
8. How is quiet operation obtained
in the motor cars bevel driving gear
located at TIE rear axle?
10. Do the driving shafts Of automo-
bileS require one or two universal
joints? Why are universals necessary?