Practicas Standar TLA 4

The most generally used metal for aircraft firewalls is __________. stainless steel. titanium alloy.

2. Most welded steel aircraft structure is made of SAE steel _________. 4130. 2024T.

Clad aluminum alloy has a coating of _____________ rolled onto its surfaces to improve its corrosion resistance. pure aluminum. ALCLAD.

SAE 1020 steel has a carbon content of __________%. Page 454. 0.20. 0.40.

Commercially pure aluminum is identified by the code number _________ . 1100. 1108.

6. Identify the series numbers for aluminum alloys that have the following major alloys: copper. magnesium. zinc.

7. Titanium can be welded by using electric arc welding. inert gas. Ammonia.

The reference wood used for aircraft construction is ____. sitka spruce. cannadian espicea.

Grade-A cotton fabric has a tensile strength of _____ pounds per inch. 80. 60.

Polyester fabric is shrunk on an aircraft structure with _______. heat. bonder compound.

Resins that are reinforced with glass filaments to make aircraft structural components are _________________ resins. thermoplastic. thermosetting.

Catalysts are used with ____________ resins to cause them to cure. polyester. epoxy.

Curing agents are used rather than catalysts when mixing ____________ _. epoxy. polyester.

Glass cloth that is woven with both warp and fill th reads is called _______________. bidirectional. unidirectional.

15. Kevlar is __________ than fiberglass fabric of equal strength. lighter. heavier.

A pure metal, as di stinguished from an alloy, ________ normally hardened by heat treatment. is. is not.

The form of heat treatment that hardens the surface of a metal while leaving the core relatively soft and tough is called _________. case hardening. metal hardening.

The form of heat treatment that soften a metal is called _____________________________________ . annealing. tempering.

The form of heal treatment that relieves strains in a metal is called _________________________________. normalizing. tempering.

The form of heat treatment that removes orne of the hardness from hardened steel is called _________________________________. tempering. hardering.

Two methods of case hardening steel are: a. carburizing b. nitriding. a. carburizing b. hardening.

A steel part is nitrided by heating it in an atmosphere containing _________________________ gas. ammonia. Argom.

Aluminum alloy is softened by heating it in an oven and cooling it ___________________. rapidly. slowly.

When an aluminum alloy part is heated in an oven and then quenched, it is said to be __________________ heat treated. solution. precipitation.

Artificial aging is done by holding a heat-treated aluminum alloy part at an elevated temperature for a specified length of time. This process is called ________________ heat treating. precipitation. agin.

When an aluminum alloy part is removed from the heat treatment oven and quenched, it is relatively soft. Over a period of a day or so, it increases its hardness and strength. This process is called ___________. aging. solution.

27. Steel is hardened by heating it to a specified temperature and then quenching it in oil, water, or brine. The hardest and most brittle steel is obtained by quenching it in ______________________________. brine. water.

A steel part may be made less brittle by heating it to a temperature quite a way below its critical temperature and allowing it to cool in still air. This procedure is called : hardening. Tempering.

Fill in the code letter that is used to identify each of the following treatments for aluminum alloy: a.As fabricated with no control over its temper. b. Annealed. c.Solution heat treated. d.Strain hardened.

Icebox rivets are aluminum alloy rivets that must be heat treated and stored in a subfreezing refrigerator until they are driven. Two alloys of which icebox rivets are made are: ______ and _______. 2017, 2024. 2017, 2024T.

An aluminum alloy sheet that has a coating of commercially pure aluminum rolled onto its surface is called ________ aluminum. clad. pure.

The aluminum alloy ri vet that may be driven as it is received from the manufacturer without having to be heat treated is made of alloy ______. 2127. 2117.

When a steel tubular fuselage is first welded. there are strains trapped in the structure. To relieve these strains, the structure is heated to a temperature above its critical temperature and allowed to cool in still air. This procedure is called _________. normalizing. annealing.

If too much time elapses between the removal of a piece of aluminum alloy from the heat treatment oven and the time it is quenched, there is danger of_______________ corrosion forming inside the part. intergranular. filiform.

The method of nondestructive inspection that allows the inside of a structure to be inspected without requiring extensive disassembly is ___________ inspection. radiographic. ultrasonic.

Two types of radiographic inspection are: a. X-ray b. gamma-ray. a. X-ray b. ultrasonic ray.

X-rays produced by low power are called ______________ X-rays. soft. hard.

Anyone working with X-ray equipment should wear a ____________ film badge. radiation monitor. radiation recorder.

A fault that does not extend to the surface ________ be detected by magnetic particle inspection. can. cannot.

Magnetic particle inspection can only be used to detect flaws in metals containing __________________________________ . iron. steel.

When the strongest possible magnetic field is requi red to inspect for a fault, the ___________ method of inspection is used. continuous. residual.

Small parts made of heat-treated steel are usuall y inspected by the __________ method of magnetic particle inspection. residual. continuous.

A part that is magnetized by holding it in a coil, or solenoid, is magnetized ________________________. circularly. longitudinally.

A part that is magnetized by passing magnetizing cunent through it is magnetized __________. circularly. longitudinally.

When inspecting for faults that extend parallel to the length of the part, the part should be magnetized ______. circularly. longitudinally.

When inspecting for faults that extend across a part, the part should be magnetized ______________. longitudinally. circularly.

Two types of magnetic medium that may be used to detect faults by the magnetic particle inspection method are: a. dry powder b. oxide suspended in alight oil. dry powder only.

A part is magnetized by holding it in a strong electromagnetic field produced by _____. DC. AC.

A part is demagnetized by holding it in a decreasing magnetic field produced by ____ _. DC. AC.

An indication of a fault detected by the magnetic particle inspection method that shows up as a rather fuzzy series of parallel lines is probably a/an ______________. inclusion. exclusion.

The type of crack that gives the strongest indication in a magnetic particle inspection is a/an ______________ crack. fatigue. heating.

For a fault to be detected by the penetrant inspection method, it ______ have to extend to the surface. does. does not.

After the penetrant has been applied to the surface of a part and allowed to soak in. the surface of the part is washed and dried, and a/an __________________ is applied. developer. revelator.

Dye-penetrant inspection _____ be used to detect faults in nonmetallic materials. can. cannot.

Faults are detected when using the fluorescent-penetrant inspection method by examining the part under a/an _____________ light. ultraviolet. infrared.

A porous material _______ suited for inspection by the dye-penetrant method. is. is not.

Abrasive blasting _________ a good way to clean a part that is to be inspected by the dye-penetrant method. is. is not.

One of the most effective methods for inspecting a part for intergranular corrosion is the ______________ method. eddy current. alternate current.

The metallic ring test is used when inspecting bonded structure for indications of. delamination. detrerioration.

After a structure is welded, it may be heated above its critical temperature and allowed to cool in still air. This procedure is used to _________. relieve stresses. soft stress.

If a welded joint is to be rewelded, all of the old weld bead must be _______________. removed. rewelded.

Too rapid cooling of a weld can cause it to contract unevenly and stresses will remain in the metal. These stresses cause the metal to. crack. bend.

. Heat should be concentrated in the area being welded, and oxides that form on the base metal give an indication of the amount of heat put into the weld. When too much heat is used, the oxide will form out to a distance of more than ____________ inch from the weld. 1/2. 3.

A properly made fillet weld has a penetration of _____ to ____ % of the thickness of the base metal. 25,50. 30,60.

65. Refer to the figure below. Identify the ill ustration for each of these types of welds: a. Cold weld with no penetration b. Bad weld with variations in penetration c . Weld that was made too rapidly d. Weld made with an excess of acetylene. a. B b. D c. A d. C. a. C b. D c. A d. B.

The threads for most aircraft structural bolts have a class-_____ fit. 3. 1.

Torque values listed for aircraft bolts normally consider the threads to be clean and ________. dry. lubricated.

The accepted rule of thumb for installing bolts in an aircraft structure is to have the bolt head _______(up or down), _________ (forward, or rearward), and _________(inboard or outboard). up, forward, outboard. down, rear ward, inboard.

A fiber-type self-locking nut should never be used on a bolt if the fastener is subject to ________________. rotation. vibration.

Identify the material of which the bolt is made when its head is marked with a/an: a. cross or asterisk. b. single dash. c. two dashes.

A bolt whose head is identified with an asterisk enclosed in a triangle is a ____________ bolt. close-tolerance. open-tolerance.

A steel bolt with no marking on its head is made of ___________ steel and _____________ approved for use in aircraft structure. low-strength, is not. high strengh, is not.

The length of the unthreaded portion of a bolt shank is called the _____________ of the bolt. grip length. space length.

Clevis bolts are designed to be used for ______ loads only. shear. small.

Extraflexible control cable is made up of individual strands of wire. 133. 134.

A swaged control cable terminal grips the cable with a strength equal to ____ % of the strength of the cable. 100. 10.

77. To be sure that the terminal ends are screwed into a turnbuckle barrel enough to produce the maximum strength, there must be no more than _________ (how many) threads showing on either end of the barrel. 3. 6.

When safetying a turnbuckle, the ends of the safety wire must be wrapped around the terminal end for at least _____ (how many) turns. 4. 2.

Identify the material of which solid rivets are made which have the following head markings: a. raised dot b. recessed dot c. raised double dash d. raised cross. a. 2017T b. 2117T c. 2024T d. 5056T. a. 1100T b. 2117T c. 2024T d. 5056T.

Give the diameter and length of these solid rivets: a. MS20470AD4-4 Diameter in____________ Length ________in b. MS20426DD4-6 Diameter in____________ Length _________ in. c. MS20470D6-8 Diameter in ___________ Length _________ in d. MS20426AD6-10 Diameter in___________ Length _________in. a. 1/8, 1/4 b. 1/8, 3/8 c. 3/16, 1/2 d. 3/16, 5/8. a. 1/8, 1/2 b. 1/8, 3/8 c. 3/16,5/8 d. 3/16, 1/4.

Friction-lock self-plugging rivets _______ approved for replacement of solid rivets on a size-for-size basis. are. are not.

When it is necessary to provide a threaded hole in a piece of thin sheet metal, a _____________ may be used. Rivnut. rivet bolt.

83. Hi-Shear pin rivets _______ be used to replace steel aircraft bolts on a size-for-size basis. may. may not.

Axle end-play can be measured with a/an _______ . dial indicator. scale.

Refer to the figure below. This vernier micrometer cal iper reads inch. 0.2792. 0.2892.

Refer to the figure below. This vernier caliper reads _____ inches. 1.437. 1.432.

. A part may be checked for flatness by using a surface plate and a ___________ . thickness gage. thickness dial.

The vernier scale on a vernier micrometer caliper is used to give an indication of _____ inch of spindle movement. 0.0001. 0.00011.

A tool used to fi nd the center of a shaft or other circle is the ______________ head of a combination set. center. top.

The diameter of a small hole is measured with a ___________ . small-hole gage. big-hole gage.

The distance between the points of a pair of dividers is measured with a/an __________________. machinist's scale. machinist's dial.

The accuracy of a micrometer caliper may be checked and calibrated by using. gage blocks. reference blocks.

An engine crankpin may be measured for out-of-round by using a/an. micrometer caliper. micrometer.

The side clearance and end-gap clearance of a piston ring in a piston are measured using a/an. thickness gage. hardness gage.

Crankshaft runout of a reciprocating engine may be measured with a/an ___________________ . dial indicator. scale indicator.

A dimensional inspection of the bushing in a rocker arm can be measured with alan __________ and a/an ______________. telescoping gage, micrometer caliper. thickness gage, micrometer caliper.

98. A reciprocating engine poppet valve can be measured for stretch by using a/an. valve stretch. valve strengh.

Magnetic particle inspection is used primarily to detect. distortion. deep surface flaws. flaws on or near the surface.

Liquid penetrant inspection methods may be used on which of the following? 1. porous plastics. 2. ferrous metals. 3. nonferrous metals. 4. smooth primer-sealed wood. 5. nonporous plastics. 2,3,4. 1,2,3. 2,3,5.

Which of these nondestructive testing methods is suitable for the inspection of most metals, plastics, and ceramics for surface and subsurface defects?. eddy current inspection. magnetic particle inspection. ultrasonic inspaction.

Which of the following defects are not acceptable for metal lines? 1. Cracked flare 2. Seams 3. Dents in the heel of a bend less than 20% of the diameter 4. Scratches/nicks on the inside of a bend less than 10% of wall thickness 5. Dents in straight section that are 20% of tube diameter. 1,2,3,4,and 5. 1,2, and 3. 1,2,3, and 5.

What nondestructive testing method requires little or no part preparation, is used to detect surface or near-surface defects in most metals, and may also be used to separate metals or alloys and their heat-treat conditions?. eddy current inspection. ultrasonic inspection. magnetic particle inspection.

What method of magnetic particle inspection is used most often to inspect aircraft parts for invisible cracks and other defects?. residual. inductance. continuous.

How many of these factors are considered essential knowledge for x-ray exposure? 1. Processing of the film. 2. Material thickness and density. 3. Exposure distance and angle. 4. Film characteristics. one. three. four.

The testing medium that is generally used in magnetic particle inspection utilizes a ferromagnetic material that has. hight permeability and low retentivity. low permeability and high retentivity. high permeability and high retentivity.

Which statement relating to the residual magnetizing inspection method is true?. surface discontinuities are made readly apparent. it is used in a practically all circular and longitudinal magnetizing procedures. it may be used with steels wich have been heat trated for stressed applications.

A mechanic has completed a bonded honeycomb repair using the potted compound repair technique. What nondestructive testing method is used to determine the soundness of the repair after the repair has cured?. eddy current test. methalic ring test. ultrasonic test.

What two types of indicating mediums are available for magnetic particle inspection?. iron and ferric oxides. wet and dry process materials. high retentivity and low permeability materials.

Which of the following materials may be inspected using the magnetic particle inspection method? 1. Magnesium alloys. 2. Aluminum alloys. 3. Iron alloys. 4. Copper alloys. 5. Zinc alloys. 1,2,3. 1,2,4,5. 3.

One way a part may be demagnetized after magnetic particle inspection is by. subjeting the part to a high voltage , low amperage AC. slowly moving the part out of an AC magnetic field of sufficient strong. slowly moving the part into an AC magnetic field of sufficient strong.

Which type crack can be detected by magnetic particle inspection using either circular or longitudinal magnetization?. 45°. longitudinal. transversal.

Which of the following methods may be suitable to use to detect cracks open to the surface in aluminum forgings and castings? 1. Dye penetrant inspection. 2. Magnetic particle inspection. 3. Metallic ring (coin tap) inspection. 4. Eddy current inspection. 5. Ultrasonic inspection. 6. Visual inspection. 1,4,5,6. 1,2,4,5,6. 1,2,3,4,5,6.

To detect a minute crack using dye penetrant inspection usually requires. that developer be applied to a flat surface. a longer than normal penetrating time. the surface tobe highly polished.

Which of the following is a main determinant of the dwell time to use when conducting a dye or fluorescent penetrant inspection?. the size and shape of the discontinuities being lockeed for. the size and shape of the part being inspected. the type and/density of the part material.

When checking an item with the magnetic particle inspection method, circular and longitudinal magnetization should be used to. reveal all possible deffects. evenly magnetized the entire part. ensure uniform current flow.

In magnetic particle inspection, a flaw that is perpendicular to the magnetic field flux lines generally causes. a large disruption of the magnetic field. a minimal disruption of the magnetic field. no disruption in the magnetic field.

If dye penetrant inspection indications are not sharp and clear, the most probable cause is that the part. was no correctlt degaussed before the developer was applied. has no appreciable damage. was nor througly washed before th developer was applied.

(1) An aircraft part may be demagnetized by subjecting it to a magnetizing force from alternating current that is gradually reduced in strength. (2) An aircraft part may be demagnetized by subjecting it to a magnetizing force from direct current that is alternately reversed in direction and gradually reduced in strength. Regarding the above statements,. both 1 and 2 are true. ony 1 is true. ony 2 is true.

The pattern for an inclusion is a magnetic particle buildup forming. a fernlike pattern. a single line. parallel lines.

A part which is being prepared for dye penetrant inspection should be cleaned with. a volatile petroleum base solvent. the penetrant developer. water base solvents only.

Under magnetic particle inspection, a part will be identified as having a fatigue crack under which condition?. the discontinuity pattern is straight. the discontinuity is found in a nonstressed area of the part. the discontinuity is found in ahighly stressed area of the part.

In performing a dye penetrant inspection, the developer. seeps into a surface crack to indicate the presence of a deffect. acts as a blotter to produce a visible indication. throughly clean the surface prior to inspection.

What defects will be detected by magnetizing a part using continuous longitudinal magnetization with a cable?. defects perpendicular to the long axis to the part. defects parallel to the long axis to the part. defects parallel to the concentric circles of the magnetic force within the part.

Circular magnetization of a part can be used to detect which defects?. deffects parallel to the long axis of the part. deffects perpendicular to the long axis of the part. deffects perpendicular to the concentric circles of magnetic force within the part.

1) In nondestructive testing, a discontinuity may be defined as an interruption in the normal physical structure or configuration of a part. (2) A discontinuity may or may not affect the usefulness of a part. Regarding the above statements,. only 1 is true. only 2 is true. both 1 and 2 are true.

What type of corrosion may attack the grain boundaries of aluminum alloys when the heat treatment process has been improperly accomplished?. concentration cell. intergranular. fretting.

Which of the following describe the effects of annealing steel and aluminum alloys? 1. decrease in internal stress. 2. softening of the metal. 3. improved corrosion resistance. 1,2. 1,3. 2,3.

Which heat-treating process of metal produces a hard, wear-resistant surface over a strong, tough core?. case hardering. annealing. tempering.

Which heat-treating operation would be performed when the surface of the metal is changed chemically by introducing a high carbide or nitride content?. tempering. normalizing. case hardering.

normalizing is a process of heat treating. aluminium alloys only. iron base metals only. both aluminium alloys and iron base metals.

Which of the following occurs when a mechanical force is repeatedly applied to most metals at room temperature, such as rolling, hammering, or bending? 1. The metals become artifically aged. 2. The metals become stress corrosion cracked. 3. The metals become cold worked, strain or work hardened. 2. 1,3. 3.

The reheating of a heat treated metal, such as with a welding torch. as little or no effect on a metals heat trated characteristics. has a cumulative enhancement effect on the ariginal heat treatment. can significantlly alter a metal´s properties in the re-heated area.

Why is steel tempered after being hardened?. to increase its hardeness and ductility. to increase its strenth and decreasse its internal stresses. to relieve its internal stresses and reduce its brittleness.

What aluminum alloy designations indicate that the metal has received no hardening or tempering treatment?. 3003F. 5052-H36. 6061-O.

Which material cannot be heat treated repeatedly without harmful effects?. UNCLAD ALUMINIUM ALLOY IN SHEET FORM. 6061T9 STAINLESS STEEL. CLAD ALUMINIUM ALLOY.

What is descriptive of the annealing process of steel during and after it has been annealed?. rapid cooling high strength. slow cooling slow strength. slow cooling increased resistance to wear.

Unless otherwise specified, torque values for tightening aircraft nuts and bolts relate to. clean dry threads. clean lighly oiled threads. both dry and lighly threads.

What is generally used in the construction of aircraft engine firewalls?. stainless steel. chrome molybdenum alloy steel. titnium nickel alloy.

Unless otherwise specified or required, aircraft bolts should be installed so that the bolthead is. upward or in rearward direction. upward or in a forward direction. downward or in a forward direction.

Alclad is a metal consisting of. pure aluminium surface layers on an aluminium alloy core. homogenious mixture of pure aluminium and aluminium alloy.

A fiber-type, self-locking nut must never be used on an aircraft if the bolt is. under shear loading. under tension loading. subject to rotation.

The Society of Automotive Engineers (SAE) and the American Iron and Steel Institute use a numerical index system to identify the composition of various steels. In the number '4130' designating chromium molybdenum steel, the first digit indicates the. basic alloying element. percentage of carbon in the alloy in hundredths of a percent. percentage of the basic element in the alloy.

(Refer to Figure 42.) Which of the bolthead code markings shown identifies an AN corrosion resistant steel bolt?. 1. 2. 3.

Aircraft bolts with a cross or asterisk marked on the bolthead are. made of aluminium alloy. close tolerance bolts. standart steel bolts.

Which statement regarding aircraft bolts is correct?. in general bolts grip lengths should equal the material thickness. alloy steel bolts smaller than 1/4 inch diameter should not used in the primary structure.

Generally speaking, bolt grip lengths should be. equal to the thickness of the material which is fastened together. equal to the thickness of the material which is fastened together plus approximately one diameter.

When the specific torque value for nuts is not given, where can the recommended torque value be found?. AC43.13-1B. TECHNICAL STANDART ORDER. AC43.13-2A.

(Refer to Figure 43.) Identify the clevis bolt illustrated. 3. 2. 1.

A particular component is attached to the aircraft structure by the use of an aircraft bolt and a castle tension nut combination. If the cotter pin hole does not align within the recommended torque range, the acceptable practice is to. exceed the recomended torque range by no more than 10%. tighten below the torque range. change washers and try again.

A bolt with a single raised dash on the head is classified as an. AN- corrsion resistant steel bolt. NAS- standart aircraft bolt.

How is a clevis bolt used with a fork-end cable terminal secured?. with a shear nut thightened to a snug fit but with no strain imposed on the fork and safetied with a cotter pin. with castle nut thightened until slight binding occurs between the fork and the fitting to wich it is being attached.

Where is an AN clevis bolt used in an airplane?. for tension and shear load conditions. where extremal load tension are applied only. only for shear load applications.

A bolt with an X inside a triangle on the head is classified as an. NAS standart aircraft bolt. NAS close tolerance bolt. AN corrosion resistant steel bolt.

The core material of Alclad 2024-T4 is. heat trated aluminium alloy and the surface material is comercially pure aluminium. comercially pure aluminium and the surface material is heat trated aluminium alloy. strain hardened aluminium alloy and the surface material is comercially pure aluminium.

The aluminum code number 1100 identifies what type of aluminum?. aluminium alloy contains 11% copper. aluminium alloy containing zinc. 99 percent comercially pure aluminium.

Aircraft bolts are usually manufactured with a. class 1 fit for the threads. class 2 fit for the threads. class 3 fit for the threads.

In the four-digit aluminum index system number 2024, the first digit indicates. the major alloying element. the number of the major alloying elements used in the metal. the percent of alloying metal used.

Why should an aircraft maintenance technician be familiar with weld nomenclature?. so that accurate visual (pictorial) comparisons can be made. in order to gain familiarity with the welding tachniqye filler material and tempetarture range used. in order to compare welds with written (non-pictorial) descriptions standarts.

(Refer to Figure 44.) Identify the weld caused by an excessive amount of acetylene. 1. 2. 3.

(Refer to Figure 44.) Select the illustration which depicts a cold weld. 1. 2. 3.

Why is it considered good practice to normalize a part after welding?. to relieve internal stresses developed within the base material. to increase the hardness of the weld. to remove the surface scale formed during welding.

Holes and a few projecting globules are found in a weld. What action should be taken?. reweld the defective portion. remove all the old weld and reweld the joint. grind the rough surface smooth , inspect and reweld all gaps/holes.

Which condition indicates a part has cooled too quickly after being welded?. cracking adjacent to th weld. discoloration of the base metal. gas pockets porosity and slags inclusion.

Select a characteristic of a good gas weld. the depth of penetration shall be suficient to ensure fusion of the filler rod. the height of the weld beat should be 1/8 inches above the base metal. the weld should tapper off smothly in to the base metal.

One characteristic of a good weld is that no oxide should be formed on the base metal at a distance from the weld of more than. 1/2. 1. 1/4.

In examining and evaluating a welded joint, a mechanic should be familiar with. likely ambient exposure conditions and intended use of the part along with type of weld and original part material composition. the welding technique, filler material and temperature range used. the parts proportion and formation of the weld.

(Refer to Figure 45.) What type weld is shown at A?. filet. butt. lap.

(Refer to Figure 45.) What type weld is shown at B?. butt. double butt. fillet.

(Refer to Figure 45.) What type weld is shown at G?. lap. butt. join.

On a fillet weld, the penetration requirement includes what percentage(s) of the base metal thickness?. 100 percent. 25 to 50 percent. 60 to 80 percent.

Which tool can be used to measure the alignment of a rotor shaft or the plane of rotation of a disk?. dial indicator. shaft gauge. protractor.

(Refer to Figure 46.) The measurement reading on the illustrated micrometer is. 0.2851. 0.2911. 0.2901.

Identify the correct statement. an outside micrometer is limited to measure diameters. tools used on certificated aircraft mus be an approved type. dividers do not provide a reading when used as a measuring device.

(Refer to Figure 47.) What is the measurement reading on the vernier caliper scale?. 1.411 inches. 1.436 inches. 1.700 inches.

Which tool is used to measure the clearance between a surface plate and a relatively narrow surface being checked for flatness?. depth gauge. thickness gauge. dial indicator.

Which number represents the vernier scale graduation of a micrometer?. .00001. .001. .0001.

Which tool is used to find the center of a shaft or other cylindrical work?. combination set. dial indicator. mocrometer caliper.

(Refer to Figure 48.) What does the micrometer read?. 2974. 3004. 3108.

If it is necessary to accurately measure the diameter of a hole approximately 1/4 inch in diameter, the mechanic should use a. telescopinng gauge and determining the size of the hole by taking a micrometer reading of the adjuable end of the telescoping gauge. 0 to 1 inch inside mocrometer and read the measurement directly from the micrometer. small hole gauge and determine the size of the hole by taking a micrometer reading of the ball end of the gauge.

(Refer to Figure 49.) The measurement reading on the micrometer is. 2758. 2702. .2792.

What tool is generally used to set a divider to an exact dimension?. machinist scale. surface gauging. dial indicator.

What tool is generally used to calibrate a micrometer or check its accuracy?. gauge block. dial indicator. machinist scale.

What precision measuring tool is used for measuring crankpin and main bearing journals for out-of-round wear?. dial gauge. micrometer caliper. depth gauge.

The side clearances of piston rings are measured with a. micrometer caliper gauge. thickness gauge. dial gauge.

How can the dimensional inspection of a bearing in a rocker arm be accomplished?. depth gauge and mocrometer. thicness gauge and push-fit arbor. telescopic gauge and micrometer.

The twist of a connecting rod is checked by installing push-fit arbors in both ends, supported by parallel steel bars on a surface plate. Measurements are taken between the arbor and the parallel bar with a. dial gauge. thickness gauge. height gauge.

The clearance between the piston rings and the ring lands is measured with a. micrometer caliper. thickness gauge. depth gauge.

What may be used to check the stem on a poppet-type valve for stretch?. dial indicator. micrometer. telescoping gauge.

Which tool can be used to determine piston pin out-of-round wear?. telescopic gauge. mocrometer caliper. dial indicator.