General o&p

What is the basic function of a switch

switches control the current flow in most aircraft electrical circuits

what is a relay

A relay is simply an electromagnetic switch where a small amount of current can control a large amount of current

How many views can there be on an orthographic projection

six

How many views are used to show most objects in an aircraft drawing

three

what information is given in the title block of an aircraft drawing

The name and adress of the company who made the part, the name of the part, the scale of the drawing, the name of the draftsman, the name of the engineer approving the part, and te number of the part

where is the title block usually located on an aircraft drawing

in the lower right hand corner of the drawing

how can you know that the aircraft drawing you are using is the most current version of the drawing

By the number in the revision block, and by the log of the most recent drawings

what is a detail drawing

A drawing that includes all the information needed to fabricate the part

what is an assembly drawing

A drawing that shows all the components of a part in an exploded form, a parts list is included with an assembly drawing

what is an installation drawing

a drawing that shows the location of the parts and assemblies on the complete aircraft

what type of drawing is most helpful in troubleshooting a system

a schematic diagram

what is a block diagram

A drawing that shows the various functions of a system by a series of blocks these blocks do not include any detail, but instead indicate what happens in each block

How are demensions shown on an aircraft drawing

By numbers shown in the break of a dimension line

what is the purpose of a center line on an aircraft drawing

it divides a part into symmetrical halves

what is the purpose of a sketch of a repair

it shows a specific bit of information and includes the minimum amount of detail needed to manufacture the part

How tight should an ms flareless fitting be tightened

tighten the fitting by hand until its snug, and then turn it with a wrench for 1/6 turn to 1/3 turn. Never turn mpre than 1/3 turn with a wrench

what damage can be caused by overtightening an ms flareless fitting

overtightening drives the cutting edge of the sleeve deep into the tube and weakens it

what type of rigid tubing can be flared with a double flare

5052-O and 60061-T aluminum alloy tubing in sizes from 1/8 inch to 3/8 inch OD

what should be done to the end of a tube that is to be flared

The cut end should be polished to remove any sharp edges that could cause the tubing to crack

what is the minimum amount of slack that must be left when a flexible hose is installed in an hydraulic system

The hose should be at least 5% longer than the distance between the fittings. this extra length provides the needed slack

How much pressure is used to proof test a flexible hose assembly

this varies with the hose but it is generally about two times the recommended operating pressure for the hose

what type of measuring instrument is used to measure the runout of an aicraft engine crankshaft

a dial indicator

what measuring instruments are used to measure the fit between a rocker arm and its bushing

The outside diameter of the shaft is measured with a micrometer caliper and the inside of the bushing is measured with a telescoping guage and the same micrometer caliper

in what increments can a vernier micrometer caliper be read

one ten thousandth .0001

what is an advantage of a veiner caliper over a micrometer caliper

the range of a veiener caliper is far greater than a micrometer caliper

what precision tool is used to measure piston ring size and clearance

Thickness guage

what precision tools are used to measure inside diameter of a cylinder

a telescoping guage and a micrometer caliper

what precision tools are used to measure the inside diameter of a small hole

a small hole guage and a micrometer caliper

what is used to repair the anodized surface of an aluminum alloy part

a chemical conversion coating such as alodine

what causes corrosion

corrosion is a natural phenomenon that attacks metal by a chemical or electrochemical action and converts it into a metalic compound such as an oxide, hydroxide, or sulfate. corrosion occurs because of the tendancy for metals to return to their natural state. noble metals like gold and platinum do not corrode since they are chemically uncombined in their natural state. conditions that can cause corrosion to devlop and worsen are moisture(acts as an electrolyte) oxygen(acts as a catalyst) chemicals(initate or catalyze the electromechanical process), and temperature(accelerates the process)

what is the base of the following expression 10 to the power of 3

10

what is the exponent of the following expression 10 to power 3

3

what is meant by scientific notation

a method of writing very large or very small numbers using powers of 10

How do you write 56.000.000 in scientific notation

5.6×10^7

how do you write .000,000,96 in scientific notation

9.6×10^-7

what formula is used to find the amount of work done when an object is moved across a floor

work=Force x distance

what determines the mechanical advantage of an arrangement of ropes and pulleys

The number of ropes that support the weight

what determines the mechanical advantage of a gear train

the ratio between the number of teeth on the drive gear and the number of teeth on the driven gear

what are the different types of human error

Human errors can be ommision commision and extraneous errors. ommision is tasks that should be preformed but were not commision are tasks done incorrectly and extraneous errors are tasks that were not authorized

what are the different levels of consequence do to human error

1.little or no effect

2.damage to equpiment or hardware

3.personal injury

4.catastrophic damage

what is the differnece between an active and latent error

and active error is an error that is commited by a person doing the work. a latent error is an error that comes from an administartive decision, a flaw in the system, or a culture that exists in a workplace. a latent error may take a long time to show up and usually show up as an active error that has its roots in the latent error