Powerplant Test#1 PIMACC Exam
Questions And Answers
Which bearing is least likely to be a roller or ball bearing? -
correct answer ✅Master rod bearing (radial engine).
An unsupercharged aircraft reciprocating engine, operated at full
throttle from sea level, to 10,000 feet, provided the RPM is
unchanged, will -
correct answer ✅lose power due to the reduced density of the air
drawn into the cylinders.
If the hot clearance is used to set the valves when the engine is
cold, what will occur during operation of the engine? -
correct answer ✅The valves will open late and close early.
Engine crankshaft runout is usually checked
1. during engine overhaul.
2. during annual inspection.
3. after a 'prop strike' or sudden engine stoppage.
4. during 100-hour inspection. -
correct answer ✅1 and 3.
,Powerplant Test#1 PIMACC Exam
Questions And Answers
The stator vanes in an axial-flow compressor -
correct answer ✅convert velocity energy into pressure energy.
In the dual axial-flow or twin spool compressor system, the first
stage turbine drives the -
correct answer ✅N(2) compressor.
The fan rotational speed of a dual axial compressor forward fan
engine is the same as the -
correct answer ✅low-pressure compressor.
On a reciprocating engine aircraft using a shrouded exhaust muffler
system as a source for cabin heat, the exhaust system should be -
correct answer ✅visually inspected for any indication of cracks or
an operational carbon monoxide detection test should be done.
What basic meter is used to indicate cylinder head temperature in
most aircraft? -
correct answer ✅Galvanometer.
What would be the possible cause if a gas turbine engine has high
exhaust gas temperature, high fuel flow, and low RPM at all engine
, Powerplant Test#1 PIMACC Exam
Questions And Answers
power settings? -
correct answer ✅Turbine damage or loss of turbine efficiency.
The EGT gauge used with reciprocating engines is primarily used to
furnish temperature readings in order to -
correct answer ✅obtain the best mixture setting for fuel efficiency.
The fuel flowmeter used with a continuous-fuel injection system
installed on an aircraft horizontally opposed reciprocating engines
measures the fuel pressure drop across the -
correct answer ✅fuel nozzles.
A typical barrier type aircraft terminal strip is made of -
correct answer ✅paper-base phenolic compound.
What is the primary purpose of the oil breather pressurization
system that is used on turbine engines? -
correct answer ✅Provides a proper oil spray pattern from the main
bearing oil jets.
The vent line connecting the oil supply tank and the engine in some
dry sump engine installations permits -
Questions And Answers
Which bearing is least likely to be a roller or ball bearing? -
correct answer ✅Master rod bearing (radial engine).
An unsupercharged aircraft reciprocating engine, operated at full
throttle from sea level, to 10,000 feet, provided the RPM is
unchanged, will -
correct answer ✅lose power due to the reduced density of the air
drawn into the cylinders.
If the hot clearance is used to set the valves when the engine is
cold, what will occur during operation of the engine? -
correct answer ✅The valves will open late and close early.
Engine crankshaft runout is usually checked
1. during engine overhaul.
2. during annual inspection.
3. after a 'prop strike' or sudden engine stoppage.
4. during 100-hour inspection. -
correct answer ✅1 and 3.
,Powerplant Test#1 PIMACC Exam
Questions And Answers
The stator vanes in an axial-flow compressor -
correct answer ✅convert velocity energy into pressure energy.
In the dual axial-flow or twin spool compressor system, the first
stage turbine drives the -
correct answer ✅N(2) compressor.
The fan rotational speed of a dual axial compressor forward fan
engine is the same as the -
correct answer ✅low-pressure compressor.
On a reciprocating engine aircraft using a shrouded exhaust muffler
system as a source for cabin heat, the exhaust system should be -
correct answer ✅visually inspected for any indication of cracks or
an operational carbon monoxide detection test should be done.
What basic meter is used to indicate cylinder head temperature in
most aircraft? -
correct answer ✅Galvanometer.
What would be the possible cause if a gas turbine engine has high
exhaust gas temperature, high fuel flow, and low RPM at all engine
, Powerplant Test#1 PIMACC Exam
Questions And Answers
power settings? -
correct answer ✅Turbine damage or loss of turbine efficiency.
The EGT gauge used with reciprocating engines is primarily used to
furnish temperature readings in order to -
correct answer ✅obtain the best mixture setting for fuel efficiency.
The fuel flowmeter used with a continuous-fuel injection system
installed on an aircraft horizontally opposed reciprocating engines
measures the fuel pressure drop across the -
correct answer ✅fuel nozzles.
A typical barrier type aircraft terminal strip is made of -
correct answer ✅paper-base phenolic compound.
What is the primary purpose of the oil breather pressurization
system that is used on turbine engines? -
correct answer ✅Provides a proper oil spray pattern from the main
bearing oil jets.
The vent line connecting the oil supply tank and the engine in some
dry sump engine installations permits -
