CDL DOUBLES & TRIPLES

when you inspect a set of couples doubles and triples, make sure the pintle hooks are

Latched

Some large trucks have convex or “spot” mirrors. These mirrors do what

make it looks smaller and farther away than they really are

For couples doubles and triples the correct position for the converter dolly air tank petcocks is what

closed

when pulling trailers only shut off what

only shut off valves at the rear of the last trailer should be closed.

when you drive a set of double or triple trailers you need more space because they:

can not be stopped or turned quickly

what may happen if the pintle hook is unlocked with the dolly still under the second trailer

the dolly tow bar may fly up

True or false?

Doubles or triples turns over more easily than other combination vehicles

Which is true about management and braking?

you need about four times as much stopping distance at 40 mph as at 20mph

when testing the coupling of double trailers, the landing gear of the rear trailer should be what:

slightly raised

True or false?

When coupling doubles and triples be sure that the pintle eye of the dolly is in place in the pintle hook of the trailer.

You cannot avoid driving through deep or flowing water. You should not:

Drive through quickly

when uncoupling the rear semitrailer, you should lower the converter dolly landing gear,

enough to remove some of the weight from the dolly

when driving a truck with more than one trailer, which trailer should be first behind the tractor?

The heaviest

Converter dollies is used to connect what?

A tractor- trailer combination or another trailer

A converter dolly is still under the second trailer when you unlock the pintle hook. what is likely too happen?

The dolly tow bar may fly up

which action is not good to do when driving on slipper roads?

use the engine break or speed retarder

True or false about emergency steering

move to the right may still be best if you have traffic on both sides of your vehicle

How can you be sure you supply air to a second trailer?

Go to the rear of the second trailer and open emergency line shut off

when driving a 100 ft twin trailer combination at 50 mph under good road conditions keep at least how man seconds of space ahead of you

11 seconds

the best way to stop any skid is to:

restore traction to the tires