AMT 287 Final Exam Questions with Correct Answers Graded A+
two individuals recognized as co inventors of the jet engine are sir frank whittle if england and dr
sanford moss of germany - Answers FALSE
the first american company to manufacture an old american designed gas turbine engine was ? -
Answers westinghouse
practically all modern airline turbofan engines are - Answers multi-spool
most all gas turbine engines use which one of the following forms of compressors ? - Answers
centrifugal or axial flow
there are two basic types of combustion chamburs - Answers can and annular type
the annular burner can is essentially a single chamber, surrounding the center axis the engine, but it is
NOT used on today's modern technology airline engines - Answers false
the centrifugal flow compressor design is much more susceptible to FOD damage than the axial flow
compressor - Answers FALSE
a gas turbine engine on todays airliners consist basically of six major sections; inlet duct, a compressor
section, a diffuser section, a combustion chamber section, a turbine section, and an after burner section
- Answers FALSE
if a compressor has a 7 to 1 compressor ratio on a standard day at sea level, what would the pressure at
the diffuser be ? - Answers 102.9 psia
the turbine section extract a major portion of the energy in the gas stream and uses the energy to turn
the compressor and engine accessories through the gearbox, driving such components as the fuel pump,
oil pump and IDG/CSD generator. this can amount to the 60-80% of the thrust. - Answers FALSE
the gas turbines engine is very sensitive to variations in temperature but the affects of humidity have an
even larger impact on the engine performance - Answers FALSE
inlet ducts may be divided into two broad categories - Answers subsonic and suoersonic
compressor blade roots are normally of the ___________ design - Answers dovetail
what makes up a stage of axial flow compression? - Answers a set of rotor blades followed by a set of
stator vanes
what do the words "variable geometry inlet duct" refer to? - Answers supersonic flight inlet
the _____________ section of a jet engine can be described at the point of highest pressure in the gas
turbine engine - Answers diffuser
, newton's ___________ law states : for every acting force there exists an equal and opposite reacting
force - Answers third
after a flame-out occurs in flight, _______________ starts will most likely be initiated by the flight crew -
Answers windmilling
there are two basic types of exhaust nozzles - Answers convergent and convergent/ divergent
most airline engines use the convergent-divergent exhaust nozzle. the nozzles are easy to design and
appropriate for supersonic aircraft - Answers FALSE
in a two spool jet engine the N2 compressor stage is driven by the low pressure (LPT) and the N1 stage is
driven by the high pressure turbine (HPT) - Answers FALSE
the exhaust duct combined with its tail come and the interior struts are designed to reduce any swirl in
the hot gases as they leave the turbines, thus creating as much as an axial flow component as possible . -
Answers FALSE
the __________ gauge is an example of an engine condition instrument - Answers EGT
the __________ gauge is an example of an engine performance instrument . - Answers EPR
as discussed in class, s method of controlling the clearance between the tips of turbine blades and the
turbine easing is called _________ . it uses varying amounts cooling air to control the thermal expansion
rate of the turbine outer case , thus keeping tip losses to the minimum - Answers active clearance
control
a free power turbine is normally found in which type of turbine engine ? - Answers turbo shaft and turbo
prop ...
two type of engine fire detection system commonly used in airline engine are : - Answers b
the egt gauge must be closely monitored during __________ because of the lack of cooling air . -
Answers starting
engine instruments in the cockpit are classified as either condition instruments or ___________
instruments - Answers performance
several functions of fuel control system are not only used for fuel metering to the engine but in addition
to the fuel control also meters fuel for : - Answers all of the above
the reverse flow/ folded combustion's chambers commonly found on buisness jet aircraft/ turboprop
and in turboshaft engines may be characterized by: - Answers b
which of the choices below is the most common type of pollution from jet engines that occurs in the
high temperature portion of a modern combustion chamber? - Answers c
two individuals recognized as co inventors of the jet engine are sir frank whittle if england and dr
sanford moss of germany - Answers FALSE
the first american company to manufacture an old american designed gas turbine engine was ? -
Answers westinghouse
practically all modern airline turbofan engines are - Answers multi-spool
most all gas turbine engines use which one of the following forms of compressors ? - Answers
centrifugal or axial flow
there are two basic types of combustion chamburs - Answers can and annular type
the annular burner can is essentially a single chamber, surrounding the center axis the engine, but it is
NOT used on today's modern technology airline engines - Answers false
the centrifugal flow compressor design is much more susceptible to FOD damage than the axial flow
compressor - Answers FALSE
a gas turbine engine on todays airliners consist basically of six major sections; inlet duct, a compressor
section, a diffuser section, a combustion chamber section, a turbine section, and an after burner section
- Answers FALSE
if a compressor has a 7 to 1 compressor ratio on a standard day at sea level, what would the pressure at
the diffuser be ? - Answers 102.9 psia
the turbine section extract a major portion of the energy in the gas stream and uses the energy to turn
the compressor and engine accessories through the gearbox, driving such components as the fuel pump,
oil pump and IDG/CSD generator. this can amount to the 60-80% of the thrust. - Answers FALSE
the gas turbines engine is very sensitive to variations in temperature but the affects of humidity have an
even larger impact on the engine performance - Answers FALSE
inlet ducts may be divided into two broad categories - Answers subsonic and suoersonic
compressor blade roots are normally of the ___________ design - Answers dovetail
what makes up a stage of axial flow compression? - Answers a set of rotor blades followed by a set of
stator vanes
what do the words "variable geometry inlet duct" refer to? - Answers supersonic flight inlet
the _____________ section of a jet engine can be described at the point of highest pressure in the gas
turbine engine - Answers diffuser
, newton's ___________ law states : for every acting force there exists an equal and opposite reacting
force - Answers third
after a flame-out occurs in flight, _______________ starts will most likely be initiated by the flight crew -
Answers windmilling
there are two basic types of exhaust nozzles - Answers convergent and convergent/ divergent
most airline engines use the convergent-divergent exhaust nozzle. the nozzles are easy to design and
appropriate for supersonic aircraft - Answers FALSE
in a two spool jet engine the N2 compressor stage is driven by the low pressure (LPT) and the N1 stage is
driven by the high pressure turbine (HPT) - Answers FALSE
the exhaust duct combined with its tail come and the interior struts are designed to reduce any swirl in
the hot gases as they leave the turbines, thus creating as much as an axial flow component as possible . -
Answers FALSE
the __________ gauge is an example of an engine condition instrument - Answers EGT
the __________ gauge is an example of an engine performance instrument . - Answers EPR
as discussed in class, s method of controlling the clearance between the tips of turbine blades and the
turbine easing is called _________ . it uses varying amounts cooling air to control the thermal expansion
rate of the turbine outer case , thus keeping tip losses to the minimum - Answers active clearance
control
a free power turbine is normally found in which type of turbine engine ? - Answers turbo shaft and turbo
prop ...
two type of engine fire detection system commonly used in airline engine are : - Answers b
the egt gauge must be closely monitored during __________ because of the lack of cooling air . -
Answers starting
engine instruments in the cockpit are classified as either condition instruments or ___________
instruments - Answers performance
several functions of fuel control system are not only used for fuel metering to the engine but in addition
to the fuel control also meters fuel for : - Answers all of the above
the reverse flow/ folded combustion's chambers commonly found on buisness jet aircraft/ turboprop
and in turboshaft engines may be characterized by: - Answers b
which of the choices below is the most common type of pollution from jet engines that occurs in the
high temperature portion of a modern combustion chamber? - Answers c
