Otro tema standards

Which has the lowest specific gravity?. Gas. Water. Kerosene. Mercury.

How is the air composed of the gases?. 78% nitrogen, 21% oxygen, 1% other gases. 78% oxygen, 21% nitrogen, 1% other gases. 78% argon, 21% oxygen, 1% other gases. 78% nitrogen, 21% co2, 1% other gases.

What factor depend the speed of sound?. Air temperature. Air pressure. Altitude.

How is called when the temperature of humid air is cooled at constant pressure and is saturated?. Dew point. Dawn point. Rain point.

What happens to the transistor if its temperature is increased above its normal operating?. Damage. Hotter it gets better it conduct (resistance drops ) than it blows. Damage. Hotter it gets poor it conduct (resistance drops ) than it blows. Damage. Colder it gets better it conduct (resistance increases) than it blows.

What is a joggle?. An offset formed on an angle strip. An offset formed on an root.

What is the principal advantage of a Teflon hose?. Strength (high temps + press) and corrosion resistant. Strength (lower temps + press) and corrosion resistant.

What are the two types of an fittings used?. Tube + Pipe. Right and left thread.

What is the acceptable lubricant of oxygen equipment used for welding?. Bee wax. Alcohol based. Petroleum wax.

With what can you replace a damaged all honeycomb core?. Fiber glass. Carbon fiber. Aluminum.

What is the inductive reactance of a circuit 400Hz AC, which contains a 5 Henry coil?. 12.560. 15.690. 2.478.

What is the formula for inductive reactance. π x voltage x resistance. 2 π x frequency x inductance.

What happen with a current when AC is applied to a capacitive circuit?. Lead voltage by 90°. lags voltage by 90°. Remains the on phase.

Symbol. Field effective transistor. PNP joint. NPN joint.

Working volt of a capacitor to which AC or pulsating DC is what?. At least 50% or greater that applied. Least 30% or greater that applied. More than 80% or greater that applied.

What has a hydraulic fluid that has a good resistance to combustion?. High flash point. Ignition flash point.

What is a jo-bolt?. 3 piece internal thread rivet. 2 piece internal thread rivet. 2 piece external thread rivet. 3 piece external thread rivet.

A thimble of a micrometer, grad in thousands of an inch is turned one full revolution, the spindle will move?. 0.025. 1/16. 0.500.

What is the least preparation is required by the NDT test?. Eddy. Ink. Magnetic. X-rays.

How part can be de-magnetized?. AC volts decrease intensity. DC volts decrease intensity. AC volts increase intensity. DC volts increase intensity.

What is the terminal color on 20 gauge wire?. Red. Blue. Yellow.

What type of soldering is a silver soldering?. Brazing or hard soldering. MIG. TIG.

What is the cylinder volume of 10” high x 10” diameter?. 785.4. 587.64. 100.

What should be done after a magna flux test?. washed to remove mag metal filings. Painted. Cover with special coating to prevent corrosion.

What depends the type of welding rod?. Thickness of metal. Type of metal. Type of current used.

In gas welding the type of flame depends on?. Type of metal. Thickness of metal. Type of current used.

What will happen with more acetylene in a flame?. Make bumps along the center of the bead + craters at the end of the weld. Make holes along the center of the bead + craters at the end of the weld.

What is the easiest way to check for delamination?. Ring test. Mallet test. Visual inspection.

Where can magna flux be used on?. Iron alloy. Aluminum Alloy. Titanium Alloy.

When should be bent aluminum without annealing?. Immediately after age hardening. Right before age hardening.

How is called the relatively small movement between two pieces of metal?. Fretting. Pitting. Galvanization.

How do you determine the length of a rivet?. 1.5 x diameter must be sticking through all sheet. Material thickness + 1.5 rivet diameter. 2.5 x diameter must be sticking through all sheet. Material thickness + 2.5 rivet diameter.

How should be the aluminum worked in relation to grain?. Perpendicular to the grain. Parallel to the grain. Same direction of the grain.

What is the cube root of 99 divided by the square root of 1?. 4.626. 6.265. 3.287.

What is the cosine of A?. Cos = ca/hypo. Cos = co/hypo. Cos = co/ca.

Resistance color band. 0 – Blk 1 – Bwn 2 – Red 3 – Ora 4 – Yel 5 – Gr 6 – B 7 – vi 8 – gray 9 - white. 0 – Bwn 1 – Blk 2 – Red 3 – Ora 4 – Yel 5 – Gr 6 – B 7 – vi 8 – gray 9 - white.

What is the purpose of duckbill pliers?. It is used to twist safety wire. Ty wraps.

What is the Power formula?. P = W x D = Force x distance T Time. P = W x D = Force x distance W - T W-Time.

What is the Watts formula?. P = E x I. P = E / I. P = R2 x I.

How is composed the solution of the electrolyte battery?. 30% potassium hydroxide 70% water. 70% potassium hydroxide 30% water.

What material gives the hardest aluminum alloy?. Zinc. Cooper. Magnesium.

What is the word cold flow usually associated with?. Flexible lines which have indentations caused by hose clamps. Rigid lines which have indentations caused by hose clamps.

How deep can scratches in aluminum lines be repairable?. Maximum 1% of wall thickness. Maximum 10% of wall thickness. Maximum 5% of wall thickness.

What is the symbol for instrument air lines?. Zig zag gray + orange. circles blue gray.

Pascal law. Pressure on a fluid is spread equally in all directions. When the temp of a combined sample of gas was kept constant and the pressure doubled the volume was reduced to half the former value. All gases expanded and contracted in direct proportion to the change in the absolute temp provided the pressure is held constant.

Boyle law. When the temp of a combined sample of gas was kept constant and the pressure doubled the volume was reduced to half the former value. Pressure on a fluid is spread equally in all directions. All gases expanded and contracted in direct proportion to the change in the absolute temp provided the pressure is held constant.

The most common rivet on a A/C structure found will have a: 2117 dimpled D. 2024 dimpled D. 2024 Universal head.

What means two dashes on an (AN bolt)?. 2024 aluminum alloy DD. 2117 aluminum alloy DD.

What does a duplex bearing look like?. A pair of round ball bearings. A single of round ball bearings. More than tree round ball bearings.

What type of bearing is used for radial loads only?. Roller bearings. Ball bearings. Niddle type.