Q&A Forum
1106 questions found
Browse by module
General topics
A dot matrix/LED construction is
- 4*7 or a 9*5 rolling end display.
- 5*9 or a 4*7 rolling end display.
- 4*7 or a 5*7 rolling end display.
why?
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?
If governor weight spring pressure is reduced
- governor weights will pivot inwards raising the governor valve allowing the blades to move to a coarser pitch.
- governor weights will spring outwards raising the governor valve allowing the blades to move to a finer pitch.
- governor weights will spring outwards raising the governor valve allowing the blades to move to a coarser pitch.
Can someone explain this to me thanks
Thrust and camber faces of a propeller should be blended out to
- 5 times the depth of damage.
- 10 times to the depth of damage.
- 30 times to the depth of damage.
why 30, is not 10?
Which contains the least amount of heat energy?
- Both 1 kg of ice at 0 degrees C and 1 kg of water at 0 degrees C have the same amount of heat energy.
- 1 kg of water at 0 degrees C has less total heat energy than 1 kg of ice at the same temperature.
- 1 kg of ice at 0 degrees C has less total heat energy than 1 kg of water at the same temperature.
Enthalpy (i.e. heat) of water = Enthalpy of ice + latent heat.
I think the answer should be that ice contain least amount of heat energy. Because ice will need to get additional heat energy to change the state/phase of the substance (ice to water).
What is the SI units for specific heat capacity?
- Jkg-1k-1.
- Jkg-1S-1.
- Jm-1k-1.
WHY?
How would you work out the work done by a machine assuming it is 100% efficient?
- Velocity ratio and efficiency.
- Mechanical advantage and output.
- Mechanical advantage and input.
WHY?
The picture shows a torque wrench with an extension. To apply a torque of 350 lb.in. the reading on the dial should be
- 245 lb.in.
- 280 lb.in.
- 350 lb.in.
why?
The line voltage of a 3 phase star connected AC generator is
- equal to the phase voltage.
- greater than the phase voltage.
- less than the phase voltage.
it is less i think the answer is wrong.
Acoustic linings made from composite materials are used in what section of the engine?
- Not used to suppress noise.
- Hot section and Cold Section.
- Cold section only.
i dont understand
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?
One of the square roots of a positive number is positive. What is the other one?
- positive
- negative
- positive or negative.
why?I dont understand.
If x in an equation equals Ly + 7cb, define the formula for finding the subject y.
- x-7cb/L
- x+7cb/L
- x-L/7cb
Non ricordo perchè
In conventional current flow, what is Fleming`s right hand rule used for?
- Generators.
- Motors.
- Inductors.
Why?
What is the current in the circuit with a resistance of 8 ohms, inductive reactance of 12 ohms, capacitive reactance of 18 ohms with 20 volts applied across it?
- 10 amps.
- 1 amp.
- 2 amps.
Can anyone explain me this one...?
What is the allowable reaction on a rivet?
- 2D
- 1D
- 1.5D
Could anyone help with this question? I couldnt find what allowable reaction is... Thanks a lot
The specific torque loading for a bolt is 50 lbs.ins but an extension of 2 inches is needed to reach the bolt in addition to the 8 inches torque wrench. What will the actual reading?
- 54 lb.ins.
- 40 lb.ins.
- 60 lb.ins.
can someone please explain this?
The intermediate gearbox is
- an epicyclic gearbox.
- a bevel gearbox.
- a reduction gearbox.
It's a bevel gearbox
What is the equation of the line shown?
- y = 2x + 2
- y = -2-x
- y = x-2
Please write your question here.
A near perfect 4:1 step up transformer has it`s primary connected to 120VAC, if the secondary is connected to a load with 1600 ohms resistance, what is the current in the primary?
- 1 amp.
- 0.3 amps.
- 1.2 amps.
Why
In a Series LC circuit if the value of the capacitance is increased then the power factor will be
- greater than 1.
- less than 1.
- equal to 1.
Please write your question here.
The call system for the captain will have the audio signal of a
- hi tone chime.
- horn.
- two tone chrime.
Is this aircraft system dependent/specific or it is standard across all aircraft
A 4:1 step-up transformer receives 120VAC in its primary and has 1600 Ohms resistance in its secondary. What is the current drawn from the source?
- 3 A.
- 1.2 A.
- 0.3 A.
Why 1.2? I think it's 0.3(480/1600)
A centre of gravity position close to its aft limit will cause the aircraft to
- pitch nose down and increase its longitudinal stability.
- pitch nose up and decrease its longitudinal stability.
- pitch nose up and increase its longitudinal stability.
can someone explain please?
Simplify (a+b)(a-c)(b-c) divided by (b+a)(c-a)(c-b).
- -1
- 1
- (a+b)(a-c)(b-c)
The first option seems more appropriate here