IET 181 QR EXAM 1 questions with
complete solutions passed
Hydrocarbons - ANS ✔Compounds composed of only carbon and hydrogen
Example: fossil fules
Non-renewable resources - ANS ✔a resource that cannot be reused or replaced easily (ex.
gems, iron, copper, fossil fuels)
renewable resource - ANS ✔A natural resource that can be replaced at the same rate at which
the resource is consumed
Sustainability - ANS ✔The ability to keep in existence or maintain. A sustainable ecosystem is
one that can be maintained
Anthropogenic - ANS ✔Human-induced changes on the natural environment
Linear Growth - ANS ✔Expansion that increases by the same amount during each time interval.
Percentage change - ANS ✔Change= change/original x 100
exponential growth - ANS ✔Growth pattern in which the individuals in a population reproduce
at a constant rate
, doubling time - ANS ✔The number of years needed to double a population, assuming a
constant rate of natural increase.
Reserved/production ratio - ANS ✔Number of years a reserve of a fuel source would last at the
rate the energy is being used at that moment.
Green house gasses - ANS ✔Carbon dioxide methane and water vapor
The Law of Conservation of Energy - ANS ✔Energy cannot be created or destroyed it only
changes form
Primary energy source - ANS ✔The original energy source
Specific Energy - ANS ✔Energy per tonne for each fuel
Si system - ANS ✔International system of units or metric system
Joule (J) - ANS ✔SI unit of energy
Power - ANS ✔The rate at which work is done
Watt - ANS ✔A measure of power equal to one joule of work per second.
Kilowatt-hour - ANS ✔a unit of energy equal to the work done by a power of 1000 watts
operating for one hour
Oil equivalent (toe) - ANS ✔Heat energy released from the complete combustion of 1000 kg of
oil or 1 Mg
complete solutions passed
Hydrocarbons - ANS ✔Compounds composed of only carbon and hydrogen
Example: fossil fules
Non-renewable resources - ANS ✔a resource that cannot be reused or replaced easily (ex.
gems, iron, copper, fossil fuels)
renewable resource - ANS ✔A natural resource that can be replaced at the same rate at which
the resource is consumed
Sustainability - ANS ✔The ability to keep in existence or maintain. A sustainable ecosystem is
one that can be maintained
Anthropogenic - ANS ✔Human-induced changes on the natural environment
Linear Growth - ANS ✔Expansion that increases by the same amount during each time interval.
Percentage change - ANS ✔Change= change/original x 100
exponential growth - ANS ✔Growth pattern in which the individuals in a population reproduce
at a constant rate
, doubling time - ANS ✔The number of years needed to double a population, assuming a
constant rate of natural increase.
Reserved/production ratio - ANS ✔Number of years a reserve of a fuel source would last at the
rate the energy is being used at that moment.
Green house gasses - ANS ✔Carbon dioxide methane and water vapor
The Law of Conservation of Energy - ANS ✔Energy cannot be created or destroyed it only
changes form
Primary energy source - ANS ✔The original energy source
Specific Energy - ANS ✔Energy per tonne for each fuel
Si system - ANS ✔International system of units or metric system
Joule (J) - ANS ✔SI unit of energy
Power - ANS ✔The rate at which work is done
Watt - ANS ✔A measure of power equal to one joule of work per second.
Kilowatt-hour - ANS ✔a unit of energy equal to the work done by a power of 1000 watts
operating for one hour
Oil equivalent (toe) - ANS ✔Heat energy released from the complete combustion of 1000 kg of
oil or 1 Mg
