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The amount of thrust produced by a jet engine or a propeller can be calculated using
- Newton's 3rd law.
- Newton's 2nd law.
- Newton's 1st law.
why?
A passive sensor
- does not require power.
- requires dc excitation.
- requires ac power input.
What is a Passive sensor?
Excessive stress on fluid or pneumatic metal tubing caused by expansion and contraction due to temperature changes can best be avoided by
- providing bends in the tubing.
- avoiding long straight sections of tubing between fixed parts of the structure of the aircraft.
- Both answers above are correct.
The answer should be 'providing bends in the tubing.
Ref.:- page 114 of AC65-9A.
Which of the following is the definition of cure time?
- The period after which the surface of the compound no longer exhibits adhesive properties.
- The time required for the mixed compound to reach an initial rubbery state.
- Both answers are correct.
I think the answer should be either A or B.
This is the ref.
http://www.toolingu.com/definition-670130-41274-cure-time.html.
http://www.wisegeek.com/what-is-curing-time.htm
Deployment of flaps will result in
- a decrease in stall angle.
- an increase in stall angle.
- a decrease in angle of attack.
is the reason for this is increase in drag??/
A Zener diode is used for
- voltage stabilisation.
- rectification.
- voltage regulation.
Isn't regulation the same as stabilization?
Capped nuts are used so
- to prevent leaks from pipe ends.
- the part is not over torqued as the bolt touches the captive part first.
- to ensure that it is dry bolted.
for this question the answer is part not over torqued as bolt touches the captive part first..
meanwhile for this question, the answer is to stop leak:
Capped nuts are used
• prevent overtightening due to the threaded portion being restricted by the cap.
• to provide a dry torque joint.
• to stop leaks.
care to explain anyone?
Which of the following influences the operation of an automatic fuel control unit on a turbojet engine?
- Exhaust gas temperature.
- Mixture control position.
- Burner pressure.
If combustion occurs at CONSTANT pressure, does anyone know how the FCU can be "influenced" by burner pressure??
In a gas turbine engine, turbine section
- temperature decreases along with pressure and velocity.
- velocity decreases and pressure increases.
- velocity increases and pressure decreases.
Debate: Does velocity (dynamic pressure) drop across the whole turbine section? Obviously V increases as it passes through the nozzle guide vanes (convergent) but after passing through each turbine stage the velocity overall will decrease.?
Which will weigh the least?
- 98 parts of dry air and 2 parts of water vapour.
- 50 parts of dry air and 50 parts of water vapour.
- 35 parts of dry air and 65 parts of water vapour.
??
Vortex generators are fitted to
- move transition point rearwards.
- move the transition point forwards.
- delay the onset of boundary layer separation.
transition point forward with the help of vortex gen. how it helps.......... confuses me??????
Capped nuts are used
- prevent overtightening due to the threaded portion being restricted by the cap.
- to provide a dry torque joint.
- to stop leaks.
need expanation
A convex mirror forms a virtual image when
- rarely.
- seldom.
- always.
Concave form virtual always ..even convex image as well?
Where the edge of a new fabric section will be located within 1 inch of a structural member to which the fabric is attached by rib lacing or other methods, the new fabric section should
- be extended 3 inches past the structural member.
- be extended to meet the structural member.
- be designated a major repair.
this is wrong answer should be "be extended 3 inch past the structure member"
When does an aircraft fabric covering repair become a major repair?
- When the repair extends over a wing rib.
- When the repair extends over three adjacent wing ribs.
- When the repair extends over two adjacent wing ribs.
the answer should be when the repair extends over two adjavent wing ribs..
Spilled mercury on aluminium
- increases susceptibility to hydrogen embrittlement
- may cause impaired corrosion resistance if left in prolonged contact.
- causes rapid and severe corrosion in prolonged contact.
Why not the third option is correct ???
Hydraulic pipes are made from
- 1100 or 2020 H14.
- annealed steel.
- 5056 or 7075.
why do we use annealed steel ...as far as i know annealed steel are soft...
Colour identification of an aluminium rivet is
- black.
- violet.
- green.
what is the reference for this answer
An inductor has 1,000 turns of wire and a cross sectional area of 0.001m2. If the core has a permeability of 0.000,001 and the coil is 0.1m. What is the value of the inductor?
- 100microH.
- 100mH.
- 10mH.
How to solve
An example of a paramagnetic material is
- silver.
- iron.
- glass.
- aluminium.
wrog!!
Worm drives operate in shafts which are
- 90 degrees to each other and in a differing plane.
- 90 degrees to each other and in the same plane.
- parallel to each other and in the same plane.
Difference between axis and plane of gears?
With reference to the licensing of aircraft maintenance engineers, the requirements for the issue of a licence without type rating can be found in
- BCAR section L.
- EASA IR Part-66.
- Airworthiness Notices.
Is this right answer? BCAR section L was superceded to IR Part 66.
Which of the following is true?
- Noise always affects the standard of work for every person.
- Noise has absolutely no measurable impact on a person's work.
- Noise does affect the standard of work with certain people.
I think option A is correct. does anyone agree?
What is the characteristic of 5.74?
- -1
- 0
- 1
whats 5.74 ?
The temperature of a pure metal can greatly affect the resistance of it. What temperature scale is used?
- Absolute.
- Centigrade.
- Fahrenheit.
answer should be absolute temperature scale , please chnage it