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The velocity of supersonic air as it flows through a divergent nozzle
- decreases.
- increases.
- is inversely proportional to the temperature.
why is it increasing?It isnt convergent,it is divergent.Can someone help?
A radial is referenced
- from a beacon.
- to a VOR.
- on a compass.
radial is for VOR and bearing for beacon. right?
Induced Drag is
- never equal to profile drag.
- equal to profile drag at Vmd.
- equal to profile drag at stalling angle.
Can someone please tell me what is Vmd?
On a high winged aircraft, what effect will the fuselage have on the up-going wing?
- The up-going wing will have a decrease in angle of attack and therefore a decrease in lift.
- The down-going will have a decrease in angle of attack and therefore a decrease in lift.
- The up-going wing will have an increase in angle of attack and therefore a decrease in lift.
can someone please explain this?I thought it was c
Airflow over the upper surface of the wing generally
- flows toward the tip.
- flows towards the root.
- flows chordwise from leading to trailing edge.
why not towards the tip?
Lift is generated by a wing
- mostly on the bottom surface.
- mostly on the top surface.
- equally on both the top and bottom surfaces.
why is it mostly on the top and not on the bottom?Shouldn't it be the bottom?
An anti-balance tab is used
- to relieve hinge loads on the controls.
- for trimming the aircraft during cruise flight.
- to give more feel to the controls.
i dont understand should i learn it by heart?
What is the collective term for the fin and rudder and other surfaces aft of the centre of gravity that helps directional stability?
- Empennage and vertical stabiliser.
- Forward fuselage keel area.
- Effective keel surface.
why not empennage?I got really confused with this question.
An increase in the Ram Ratio of an intake will
- have no effect upon the temperature of the compressed air.
- increase the temperature of the compressed air.
- decrease the temperature of the compressed air.
I think the answer "C" or "3" is correct.
With a multi-engined aircraft the torque pressure would be
- There is only one gauge for all engines.
- same on all engines.
- similar on all engines.
what is the difference betweeen same and similar?
When in reverse pitch, CTM will tend to move the propeller blades towards
- a positive pitch.
- a position depending on rpm.
- a negative pitch.
i dont understand it.
Auto feathering is disarmed
- during landing.
- during take off.
- in the cruise.
why is it disarmed during cruise?Wouldnt be right to have it auto while crusing in case of engine failure?
In what position is the constant-speed propeller control placed to check the magnetos?
- Full decrease, low propeller blade pitch angle.
- Full increase, low propeller blade pitch angle.
- Full increase, high propeller blade pitch angle.
what are magnetos?
A rotating propeller imparts rearwards motion to a
- small mass of air at high velocity.
- large mass of air at low velocity.
- small mass of air at low velocity.
i dont understand
The purpose of using reverse pitch propellers is to
- provide aerodynamic breaking.
- allow aircraft to taxi backwards.
- reverse the direction of rotation of the propeller.
isnt the B also right?
The function of a propeller pitch lock is to prevent the propeller from
- coarsening.
- reducing below flight fine pitch.
- fining off in the event of pitch lock mechanism failure.
i found an answer :leaflets refer to a pitch lock that holds the fine pitch stop in position, but also adds that some
manufacturers have a pitch lock device that locks the prop in its last position in the event of failure of the pitch lock
mechanism. For a description of this system see Jeppesen Aircraft Propellers and Controls page 136.
Charles' Law states that
- volume varies inversely with temperature.
- volume varies directly with temperature.
- volume equals pressure * temperature.
I think it is wrong,because the formula for charles is V1/T1=V2/T2 which means that volume with temperature are inversely proportional.
A 200 cm titanium bar increases in length by 2 cm when its temperature rises by 100 degrees C. Its linear expansivity is
- 0.001 per degrees C.
- 0.0001 per degrees C.
- 0.0101 per degrees C.
i dont understand it
Convert 15 degrees C to degrees F
- 37 degrees F.
- 59 degrees F.
- 62 degrees F.
it doesnt make sense.The formula is F=5/9*15+32 and the asnwer isnt close to 59 what is happening?
Select the correct statement from the following.
- Matter can exist in only two basic states.
- Matter can only exist in one of four states.
- Matter can only exist in one of three states.
in another question we had 3 states now we have 4?The fourth is plasma but why?
Which of the following 2 points are equal?
- -32 degrees C and -0 degrees F.
- 40 degrees C and 40 degrees F.
- -40 degrees C and -40 degrees F.
why?
If you apply this waveform to this circuit, what is the output across the capacitor?
- Pulsed negative
- Pulsed positive
- Zero
can someone explain?
Formation of white crystals of potassium carbonate on a properly serviced Ni-cd battery indicates
- over charged.
- full charged.
- under charged.
why old batteries wich were too much discharged produce white crystas?
A starter generator has a
- low resistance series field and a low resistance shunt field.
- low resistance series field and a high resistance shunt field.
- high resistance series field and a low resistance shunt field.
can someone explain pls?
A NAND gate has inputs A and B and output C. If the output was zero, what are the inputs?
- A=1 B=1.
- A=0 B=0.
- A=1 B=0.
EXPLAIN PLS