ch5 skills for driving trucks and trailers Flashcards
What can cause your trailer to jackknife when you’re backing up?
As your trailer begins to
turn, your tractor must
begin to follow a path
that matches the trailer’s path. If it isn’t you risk jackknifing your vehicle
What actions should you take if your trailer whips or swerves?
If your trailer whips or swerves, slow down and stop as soon as it’s safe. Some type of adjustment will be needed to fix whatever has caused your
trailer to whip. You may need to fix a mechanical problem, adjust your load
or change your driving
When a coupling device (other than a fifth wheel) is used to join
vehicles in combination, is an additional coupling device such as a
chain or cable required?
When you use any coupling device (other than a fifth wheel) you must also
use chains or metal cables to connect the towed and towing vehicles. These
auxiliary chains or cables must be equal to the strength of the coupling device.
Except for a pole trailer, what’s the maximum length permitted for a
draw bar or coupling device between vehicles?
The drawbar or other connection between the motor vehicle and the trailer
may not be more than five metres long unless you’re towing a pole trailer.
. When coupling a tractor to a semi-trailer, should the air lines be
connected to the trailer before or after connecting the kingpin to the
fifth wheel?
Some trailers don’t have
spring brakes. With these,
connect the lines and charge
the trailer system and then
apply the trailer brakes
before connecting to the
trailer
How do you check that the fifth wheel jaws have locked to the trailer
pin?
- fifth wheel jaws have engaged the
kingpin * no space or daylight between
the fifth wheel and the trailer apron - fifth wheel release handle is in the locked
position
To uncouple a tractor from a semi-trailer, are the air lines unhooked
before or after separating the fifth wheel from the trailer pin?
prior to uncoupling, Disconnect air lines and electrical cable and secure lines to tractor
what’s a converter dolly and when’s it used?
When a driver is towing more than one trailer, sometimes a converter dolly is
used. A converter dolly has an axle, a fifth wheel and a hitch. Other devices may
also be used to couple and spread the weight of large loads.
For which type of trailer connection are safety chains or cables
required — a fifth wheel connection or pintle hitch connection?
pintle hitch connection
What’s the location of a single-unit truck’s central weight distribution
point?
Some trucks, like five-ton freight trucks,
are designed to have approximately 90 per cent of the weight of their cargo
on their rear axle(s) and 10 per cent on the steering axle
What could result from placing too much weight over any one set of
wheels or over any one axle?
Should the majority of the weight of a load on a single-unit truck
be placed directly behind the cab, slightly ahead of the rear axle or
slightly behind the rear axle?
Should the majority of the weight of a load on a semi-trailer be placed
directly over the fifth wheel, at the midway point of the trailer or
directly over the trailer axle?
What are the two methods or categories of securing cargo for
transporting?
What’s dunnage and why’s it used?
What’s the rough guide for spacing tiedowns to secure your load?
Why must you compare the weight of your load to the strength of
your tiedowns?
What types of loads must be covered with a tarp?
. What’s the safe working load of a tiedown?
What’s a tiedown assembly?
. What’s a load binder and why’s it used?
Why must you protect tiedowns from rubbing against your load?
What are the dangers in transporting livestock?
. What are two types of loads that have a high centre of gravity which,
if not adequately secured to prevent movement or swaying, can
increase the chances of your vehicle rolling over?
Why’s it important for you to know the height and width of the vehicle
you’re operating?
Why’s it necessary to know the gross vehicle weight (GVW) of the
vehicle you’re operating?
What factors determine the maximum allowable GVW for which the
vehicle may be licensed?
Do load limit signs at the approach to bridges and structures apply to
all vehicles?
Are you allowed to display Wide Load signs on your vehicle when a
wide load isn’t actually being transported?
What’s the maximum legal width of a vehicle that’ll be operated on a
highway?
What’s the maximum length a load may project to the rear?
What’s required before oversize or overweight loads may be
transported?
What are the conditions for obtaining a permit to transport overweight
or oversize loads?
Are all commercial vehicles required to report to weigh scales?
