MFRI HAZMAT ACTUAL PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED A+
◉What is the EPA definition of a hazardous substance?. Answer: Any
item or chemical which can cause harm to people, plants or animals
when released by spilling, leaking, pouring, emitting, emptying,
discharging, injecting, escaping, leaching, dumping, or disposing into
the environment.
◉Flash point. Answer: The lowest temperature at which a
combustible material will produce an ignitable vapor.
◉Ignition temperature. Answer: minimum temperature a substance
should attain in order to ignite under specific test conditions
◉Boiling point. Answer: the temperature at which the vapor
pressure of a liquid equals the surrounding atmospheric pressure
◉Soluble. Answer: The ability of a substance to dissolve in water
◉Vapor pressure. Answer: liquid held inside of a closed container
, ◉Vapor density. Answer: the weight of an airborne concentration as
compared to an equal volume of dry air
◉Specific gravity. Answer: the weight of a liquid as compared to
water
◉Alpha particle. Answer: positively charged particles emitted by
certain radioactive materials, identical to the nucleus of a helium
atom
◉Beta particle. Answer: elementary particles, emitted from a
nucleus during radioactive decay, with a single electrical charge and
a mass equal to that of a proton
◉Neutron particle. Answer: penetrating particles found in the
nucleus of the atom that are removed through nuclear fusion or
fission. Although neutrons are not radioactive, exposures to them
can create radiation
◉Gamma. Answer: high energy, short wavelength, electromagnetic
radiation
◉Flammable range. Answer: the range of concentration between the
lower and upper flammable limits
QUESTIONS WITH SOLUTIONS GRADED A+
◉What is the EPA definition of a hazardous substance?. Answer: Any
item or chemical which can cause harm to people, plants or animals
when released by spilling, leaking, pouring, emitting, emptying,
discharging, injecting, escaping, leaching, dumping, or disposing into
the environment.
◉Flash point. Answer: The lowest temperature at which a
combustible material will produce an ignitable vapor.
◉Ignition temperature. Answer: minimum temperature a substance
should attain in order to ignite under specific test conditions
◉Boiling point. Answer: the temperature at which the vapor
pressure of a liquid equals the surrounding atmospheric pressure
◉Soluble. Answer: The ability of a substance to dissolve in water
◉Vapor pressure. Answer: liquid held inside of a closed container
, ◉Vapor density. Answer: the weight of an airborne concentration as
compared to an equal volume of dry air
◉Specific gravity. Answer: the weight of a liquid as compared to
water
◉Alpha particle. Answer: positively charged particles emitted by
certain radioactive materials, identical to the nucleus of a helium
atom
◉Beta particle. Answer: elementary particles, emitted from a
nucleus during radioactive decay, with a single electrical charge and
a mass equal to that of a proton
◉Neutron particle. Answer: penetrating particles found in the
nucleus of the atom that are removed through nuclear fusion or
fission. Although neutrons are not radioactive, exposures to them
can create radiation
◉Gamma. Answer: high energy, short wavelength, electromagnetic
radiation
◉Flammable range. Answer: the range of concentration between the
lower and upper flammable limits
