CDL DOUBLES TRIPLES ENDORSEMENT
COMPREHENSIVE TEST PAPER 2026 FULL
SOLUTION STUDY GUIDE
● Some large trucks have convex or spot mirrors these mirrors ?
Answer: Make things look smaller and farther away than they really are
● For couples doubles and triples the correct position for converter
dolly air tanks for petcocks is ? Answer: Closed
● When pulling trailers ? Answer: Only the shut off valves at the rear of
the last trailer should be close
● When you drive a set of double or triple trailers you need more space
because they ? Answer: Cant be stopped or turn quickly
● What may happen if the pintle hook is unlocked with the dolly still
under the second trailer ? Answer: The dolly tow bar may fly up
● Which of these statements is true about quick steering movements
with doubles or triples ? Answer: Doubles or triples turn over more
easily than other combination of Vehicles
, ● When testing the coupling of doubles trailers the landing gear or the
rear trailer should be ? Answer: Slightly raised
● Which statement is true ? Answer: When coupling doubles and triples
be sure the pintle eye of the dolly is place in the pintle hook of the trailer
● You cannot avoid driving through deep or flowing water you should
not ? Answer: Drive through quickly
● When uncoupling the rear semi trailer you should lower the converter
dolly landing gear ? Answer: 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 a tractor ? Answer: The heaviest
● Converter dollies are used to connect ? Answer: 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 to happen ? Answer: The dolly towbar may fly
up
● Which action is not good to do when driving on slippery roads ?
Answer: Use the engine break or speed retarder
COMPREHENSIVE TEST PAPER 2026 FULL
SOLUTION STUDY GUIDE
● Some large trucks have convex or spot mirrors these mirrors ?
Answer: Make things look smaller and farther away than they really are
● For couples doubles and triples the correct position for converter
dolly air tanks for petcocks is ? Answer: Closed
● When pulling trailers ? Answer: Only the shut off valves at the rear of
the last trailer should be close
● When you drive a set of double or triple trailers you need more space
because they ? Answer: Cant be stopped or turn quickly
● What may happen if the pintle hook is unlocked with the dolly still
under the second trailer ? Answer: The dolly tow bar may fly up
● Which of these statements is true about quick steering movements
with doubles or triples ? Answer: Doubles or triples turn over more
easily than other combination of Vehicles
, ● When testing the coupling of doubles trailers the landing gear or the
rear trailer should be ? Answer: Slightly raised
● Which statement is true ? Answer: When coupling doubles and triples
be sure the pintle eye of the dolly is place in the pintle hook of the trailer
● You cannot avoid driving through deep or flowing water you should
not ? Answer: Drive through quickly
● When uncoupling the rear semi trailer you should lower the converter
dolly landing gear ? Answer: 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 a tractor ? Answer: The heaviest
● Converter dollies are used to connect ? Answer: 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 to happen ? Answer: The dolly towbar may fly
up
● Which action is not good to do when driving on slippery roads ?
Answer: Use the engine break or speed retarder
