MASSACHUSETTS - HazMat Backstory Questions With
Complete Solutions
A converter gear is:
› A coupling device. Correct Answers A converter gear on a
dolly is a coupling device with one or two axles and a fifth
wheel, onto which a semi-trailer can be coupled to the rear of a
tractor-trailer combination.
A double or triple:
› Is usually less stable than other smaller commercial vehicles.
Correct Answers Double and triple trailers are less stable than
single commercial vehicles and are more likely to roll over when
being driven. To prevent rollovers, doubles and triples must be
driven very smoothly and gently.
A driver should ensure that:
› The shipping paper matches the markings and labels on
packages. Correct Answers It is always a good idea to compare
package markings and labels to accompanying shipping papers.
Always make sure the shipper has displayed the correct basic
description on the shipping paper and has provided the proper
labels on the packages.
A material's hazard class reflects:
› The risks associated with the material. Correct Answers A
hazardous material will be placed into one of nine classes to
explain the type of risks associated with the material.
A person attending a placarded vehicle may be:
,› Within 100 feet of the vehicle. Correct Answers A person
attending a parked placarded vehicle must be either awake
inside the vehicle or they must be within 100 feet of it. If not
inside the vehicle itself, the person must have a clear view of the
vehicle. The person attending may not be inside the sleeper
berth.
A person should not smoke within ____ of a vehicle placarded
for Class 3 or Division 2.1 materials.
› 25 feet Correct Answers You should not smoke within 25 feet
of a placarded cargo tank used to transport materials that are
categorized as Class 3 (flammable liquids) or Division 2.1
(gases). Do not smoke or carry a lit cigar, pipe, or cigarette near
a vehicle containing flammable or explosive materials.
A person supervising the loading of a tank:
› Must stay within 25 feet of the tank. Correct Answers The
loading and unloading of a tank must be watched by a qualified
person. They must be alert; have a clear view of the tank; stay
within 25 feet of the tank; know the hazards of the materials
involved; know the procedures to follow in an emergency; and
be authorized and able to move the tank if necessary.
A placard should be placed:
› At least three inches away from any other markings. Correct
Answers A placard must be placed at least three inches away
from any other markings. The placard should be kept clear of
attachments or devices, such as doors and ladders. Placards
should always be placed against a background of a contrasting
color.
, A speed limit posted on a curve:
› Could be too fast to be driven in a double or triple. Correct
Answers A posted speed on a curve may be safe to be driven
when operating a straight truck or a single-trailer combination
but unsafe to be driven in a double or triple.
After trailers are properly coupled, there will be ____ between
the upper and lower fifth wheel.
› No space Correct Answers Before a trip, be sure to inspect all
couplings. There should be no space between the upper and
lower fifth wheel.
Air and electric lines should be attached:
› With enough slack for turns. Correct Answers The air lines
should be securely attached to the proper glad hands and should
not contain any leaks. Air lines and electric lines should be
attached while allowing enough slack to permit easy turning.
Air lines should be securely connected to:
› The proper glad hands. Correct Answers When inspecting the
convertor dolly, ensure that all components are present and in
proper working condition. The air lines should be securely
attached to the proper glad hands and should not contain any
leaks. They should be attached with enough slack to allow for
easy turning.
Before a trip, you should ensure that air flows to all trailers by:
› Opening the rear shut-off valves and listening for escaping air.
Correct Answers Before a trip, ensure that air in the air brake
system reaches all trailers. Do this by waiting for air pressure to
build, then sending air to both the emergency and service lines
Complete Solutions
A converter gear is:
› A coupling device. Correct Answers A converter gear on a
dolly is a coupling device with one or two axles and a fifth
wheel, onto which a semi-trailer can be coupled to the rear of a
tractor-trailer combination.
A double or triple:
› Is usually less stable than other smaller commercial vehicles.
Correct Answers Double and triple trailers are less stable than
single commercial vehicles and are more likely to roll over when
being driven. To prevent rollovers, doubles and triples must be
driven very smoothly and gently.
A driver should ensure that:
› The shipping paper matches the markings and labels on
packages. Correct Answers It is always a good idea to compare
package markings and labels to accompanying shipping papers.
Always make sure the shipper has displayed the correct basic
description on the shipping paper and has provided the proper
labels on the packages.
A material's hazard class reflects:
› The risks associated with the material. Correct Answers A
hazardous material will be placed into one of nine classes to
explain the type of risks associated with the material.
A person attending a placarded vehicle may be:
,› Within 100 feet of the vehicle. Correct Answers A person
attending a parked placarded vehicle must be either awake
inside the vehicle or they must be within 100 feet of it. If not
inside the vehicle itself, the person must have a clear view of the
vehicle. The person attending may not be inside the sleeper
berth.
A person should not smoke within ____ of a vehicle placarded
for Class 3 or Division 2.1 materials.
› 25 feet Correct Answers You should not smoke within 25 feet
of a placarded cargo tank used to transport materials that are
categorized as Class 3 (flammable liquids) or Division 2.1
(gases). Do not smoke or carry a lit cigar, pipe, or cigarette near
a vehicle containing flammable or explosive materials.
A person supervising the loading of a tank:
› Must stay within 25 feet of the tank. Correct Answers The
loading and unloading of a tank must be watched by a qualified
person. They must be alert; have a clear view of the tank; stay
within 25 feet of the tank; know the hazards of the materials
involved; know the procedures to follow in an emergency; and
be authorized and able to move the tank if necessary.
A placard should be placed:
› At least three inches away from any other markings. Correct
Answers A placard must be placed at least three inches away
from any other markings. The placard should be kept clear of
attachments or devices, such as doors and ladders. Placards
should always be placed against a background of a contrasting
color.
, A speed limit posted on a curve:
› Could be too fast to be driven in a double or triple. Correct
Answers A posted speed on a curve may be safe to be driven
when operating a straight truck or a single-trailer combination
but unsafe to be driven in a double or triple.
After trailers are properly coupled, there will be ____ between
the upper and lower fifth wheel.
› No space Correct Answers Before a trip, be sure to inspect all
couplings. There should be no space between the upper and
lower fifth wheel.
Air and electric lines should be attached:
› With enough slack for turns. Correct Answers The air lines
should be securely attached to the proper glad hands and should
not contain any leaks. Air lines and electric lines should be
attached while allowing enough slack to permit easy turning.
Air lines should be securely connected to:
› The proper glad hands. Correct Answers When inspecting the
convertor dolly, ensure that all components are present and in
proper working condition. The air lines should be securely
attached to the proper glad hands and should not contain any
leaks. They should be attached with enough slack to allow for
easy turning.
Before a trip, you should ensure that air flows to all trailers by:
› Opening the rear shut-off valves and listening for escaping air.
Correct Answers Before a trip, ensure that air in the air brake
system reaches all trailers. Do this by waiting for air pressure to
build, then sending air to both the emergency and service lines
