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Find the the area of a circular ring Whose outer diameter is 10 cm and inner diameter is 6 diameter?
- 4pi cm^2
- 16pi cm^2
- 64pi cm^2
How come? A get 64 out from R^2-r^2
100000 in binary is what number in decimal?
- 16
- 32
- 64
Isn't 64 correct??
An individual suffering from stress when confronted with a task within his capability is likely to think the task is
- well within his normal ability.
- beyond his level of competence.
- someone else's responsibility.
If stress is defined as the difference between an individuals perception of the demands placed upon him and his actual ability to meet those demands, then if you are stressed, even though the task is within your capability, your perception is that it isn't.
The method of ascertaining the voltage of a standard aircraft lead-acid battery is by checking
- the voltage with rated load switched ON.
- the voltage on open circuit.
- the voltage off load.
What is the difference between Off load and open circuit?
Galvanic corrosion refers to a type of
- corrosion between two pieces of material.
- electrochemical plating process between metal layers.
- uniform surface corrosion across the exposed area.
"two pieces of material" - this is a sloppy question - one piece of "material" could be plastic and the other metal!
Power is adjusted in a gas turbine engine by
- increasing fuel flow.
- increasing air and fuel flow.
- increasing airflow to the combustion chamber.
How exactly is the air flow increased? Is it not the case that to draw more air into the engine, the compressor needs more power which needs more power output from the turbine which means higher fuel flow first.
What is the value of X in the diagram shown?
- 30 degrees
- 35 degrees
- 40 degrees
Please can anyone explain this?b
A self aligning bearing is a
- angular bearing.
- precision bearing.
- radial bearing.
Should angular not be the correct answer?
Determine x in the following: (2x-1)(3x+2) = 0.
- 1.5, 1
- 0.5, 3
- -0.67, 0.5
Can anyone explain how to work this out? Thnx in advance
What is 738 in binary coded decimal?
- 1011110010
- 111100010
- 11100111000
101110001 how this isnt right?
Specified time of contact between the indentor and test piece in a vickers or brinell hardness test is
- 20 seconds.
- 10 seconds.
- 15 seconds.
This question is unclear, as contact time is different depending on ferrous or non-ferrous metals.
Electrochemical reaction is caused by the contact of
- bonding.
- moisture on the surface of the metal.
- dissimilar metals.
Wouldn't C be correct as 'electrochemical' corrosion requires a anode and a cathode, where as a 'chemical' corrosion being oxidation would be moisture on the surface of the metal? Please help? Thanks.
A square around the NW digit in the quadrant of a fastner would indicate
- interference fit fastener.
- hi-lock to be used
- fluid tight fastner.
Can someone help explain quadrants of fasteners please? Thanks.
The material specifications for a certain aircraft require that a replacement oil line be fabricated from3/4 inch, 0.072 5052-0 aluminium alloy tubing. What is the inside dimension of this tubing?
- 0.688 inch.
- 0.606 inch.
- 0.750 inch.
Can someone help explain please? Thanks.
The difference between transient droop and static droop is
- overswing.
- underswing.
- a hole in one.
can anyone explain me what is trasient droop and static droop?
The maximum allowable noise dose is
- a sustained noise level of exactly 85 dB for eight hours.
- any combination of noise and time which exceeds 90 dB TWA.
- a continuous noise exposure level of 70 dB for eight hours.
Maximum allowable cannot be OVER 90db twa? Surely 90db twa IS the max, not something OVER this level?
Under what conditions will an aircraft create best lift?
- Hot damp day at 1200 ft.
- Cold dry day at 200 ft.
- Cold wet day at 1200 ft.
Cold dry is completely opposite in meaning. What is a cold dry day ? Can someone explain .
In corrosion, the electrode that loses electrons is
- the cathode.
- either the cathode or the anode depending upon the electrolyte.
- the anode.
I don't understand.
Cathode is positive and electrons are negative. How can electrons ever be attracted to anode?
A journal load is
- compression.
- radial.
- axial.
Question is a bit ambiguous! Wouldn't the direction of load be radial and the type of load be compression?
In a resonant parallel circuit, current is
- zero.
- minimum.
- maximum.
Please can anyone explain
Which of the following is least associated with the study of human factors?
- Clinical research.
- Health and Safety.
- Error assessments.
Is it just me that I believe it is ergonomics? All this module is about the health of the LAE and the safetybat work. While there is no chapter for ergonomics.
If there is a positive allowance between the smallest possible hole and the largest possible shaft, the fit is known as
- a transition fit.
- a clearance fit.
- an interference fit.
I think this question is wrong, I think the answer should be interference fit, please check
The dimensions of an MS20430AD-4-8 rivets are
- 1/8 inch in diameter and 1/4 inch long.
- 4/16 inch in diameter and 8/32 inch long.
- 1/8 inch in diameter and 1/2 inch long.
Why? i know that the diameter must be in thirty-seconds inch division while length is expressed in sixteenths so 4/32 equals 1/8 and 8/16 equals 1/2.. is it wrong?
If the reverse bias voltage across a diode is too high
- load current reduces to zero.
- load current increases rapidly.
- load current reverses.
Please kindly explain. Also can I get a link or material where I can read up on all the modules.thanks.
The most suitable class of amplifier for a high fidelity radio transmitter is
- B.
- C.
- A.
Please kindly explain. Also can I get a link or material where I can read up on all the modules.thanks.