ACRM Conceptual Questions (Mock Exams) no pass

C

Normalizing is a process of heat treating _____.

A. non-ferrous metals aside from aluminum

B. aluminum alloys only

C. ferrous metals only

D. both ferrous and non-ferrous metals

A

What does an 'X' on a cable indicates?

A. AC power

B. Auxiliary power

C. Control system

D. Close-tolerance structure

C

At what temperature should steel be tempered?

A. Above annealing temperature

B. At annealing temperature

C. Below annealing temperature

D. 1.5 times the annealing temperature

C

If a material is found to be in the tertiary phase of creep, it _____.

A. should be stop drilled and be condition-monitored

B. should undergo dye-penetrant inspection for evaluation

C. should be replaced immediately

D. is still safe to be used

A

Unless otherwise specified, torque values for tightening aircraft nuts and bolts relate to _____.

A. clean, dry threads.

B. clean, lightly-oiled threads

C. clean, oil-soaked threads

D. both dry and lightly oiled threads

D

Why is Nickel Chromium used in many exhaust systems?

A. Lightweight and flexible

B. Corrosion-resistant and low heat conductivity

C. Corrosion-resistant and high heat conductivity

D. Corrosion-resistant and low expansion coefficient

D

How are pressure hoses categorized?

A. According to the outer diameter

B. According to the inner diameter

C. According to the max allowable load

D. According to the max applied pressure

C

The dimensions of an MS20430AD8-6 rivets are _____.

A. 3/8 inch in length and 1/4 inch in diameter

B. 1/2 inch in length and 3/16 inch in diameter

C. 1/4 inch in diameter and 3/8 inch in length

D. 3/16 inch in diameter and 1/2 inch in length

B

A category of plastic material that is capable of softening or flowing when reheated is described as a _____.

A. thermocure

B. thermoplastic

C. thermoset

D. thermoflow

D

The side clearances of piston rings are measured with a _____.

A. dial gauge

B. micrometer caliper gauge

C. protractor

D. thickness gauge

D

In what direction/s are composite fabric materials considered to be strongest?

A. All

B. Bias

C. Weft

D. Warp

D

Why is steel tempered after being hardened?

A. To increase its hardness and ductility.

B. To increase its strength and decrease its internal stresses.

C. To relieve its internal stresses and increase its brittleness.

D. To relieve its internal stresses and reduce its brittleness.

B

What is the color code for fire-extinguisher lines?

A. Black

B. Brown

C. Red

D. Yellow

A

What is the color of an AN fitting?

A. Black

B. Brown

C. Red

D. Yellow

D

In Gas Tungsten Arc welding, a stream of inert gas is used to _____.

A. attract oxygen to the puddle of molten metal

B. concentrate the heat of the arc and prevent its dissipation

C. lower the temperature required to properly fuse the metal

D. prevent the formation of oxides in the puddle

A

A squib, as used in a fire-protection system, is a _____.

A. device for causing the fire-extinguishing agent to be released

B. probe used for installing frangible disks in extinguisher bottles

C. temperature-sensing device

D. wizard-born muggle

A

How should a welding torch flame be adjusted to weld stainless steel?

A. Slightly carburizing

B. Slightly oxidizing

C. Neutral

D. Welding stainless steel is not acceptable for aircrafts.

D

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

A. Welding

B. Tempering

C. Normalizing

D. Case hardening

A

Impact resistance measures the material's _____.

A. toughness

B. hardness

C. fusibility

D. ductility

D

The replacement of a damaged vertical stabilizer with a new identical stabilizer purchased from the aircraft manufacturer is considered a _____.

A. major alteration

B. minor alteration

C. major repair

D. minor repair

A

What is likely to occur if hydrated wash primer is applied to unpainted aluminum and then about 30 to 40 minutes later a finish topcoat, when the humidity is low?

A. A glossy, blush-free finish

B. A dull finish due to the topcoat 'sinking in' to primer that is still too soft

C. Corrosion

D. Reflection of ultraviolet from the fabric

D

The most important consideration when selecting welding rod is ______.

A. ambient conditions

B. amount of acetylene

C. flame temperature

D. material compatibility

D

What is the usual cause of runs and sags in aircraft finishes?

A. Low atmospheric humidity

B. Material is being applied too fast

C. Material is being applied too slow

D. Too much material applied in one coat

D

The strength classification of fabrics used in aircraft covering is based on _____.

A. bearing strength

B. compressive strength

C. shear strength

D. tensile strength

C

A female fastener with internal threads.

A. Bolt

B. Joggle

C. Nut

D. Washer

B

What kind of bolt has a head symbol of a single line?

A. Clevis

B. Corrosion-resistant

C. Low-strength material

D. Special

D

Which statement is true regarding a cantilever wing?

A. It has non-adjustable lift struts.

B. It requires only one lift strut on each side.

C. External bracing is needed.

D. No external bracing is needed.

D

Bolt grip lengths should be _____.

A. the sum of the thickness of the material which is fastened together and bolt's diameter

B. equal to thrice the thickness of the material to be fastened

C. one and one half times the thickness of the material to be fastened

D. equal to the length of the unthreaded portion of the bolt shank

B

This rivet is known as an "icebox rivet" because it must be kept in cool places to retard ageing.

A. 2017

B. 2024

C. 5056

D. 7050

C

An aircraft grade rivet with the code MS20430DD4-8 rivet is to be used in a military aircraft. The rivet head is _____.

A. countersunk

B. flat

C. round

D. universal

D

When approaching the rear of an idling turbojet or turbofan, the hazard area extends _____ aft of the engine.

A. 25 feet

B. 50 feet

C. 75 feet

D. 100 feet

D

Nickel-cadmium battery cases and drain surfaces that have been affected by electrolyte should be neutralized with _____.

A. aliphatic naphtha

B. aromatic naphtha

C. boric acid

D. linseed oil

A

The shop head of a rivet should be _____.

A. one and one-half times the diameter of the rivet shank

B. one-half times the diameter of the rivet shank

C. one and one-half times the diameter of the manufactured head of the rivet

D. one-half times the diameter of the manufactured head of the rivet

B

Which fiber to resin (percent) ratio for advance composite wet lay-ups is generally considered the best for strength?

A. 40:60

B. 60:40

C. 50:50

D. 70:30

A

It is a non-electrolytic chemical treatment for aluminum alloys that increases its corrosion resistance and paint-bonding qualities.

A. Alodizing

B. Anodizing

C. Dichromating

D. Galvanizing

A

The useful load of an aircraft is defined as the _____.

A. difference between the maximum gross weight and empty weight

B. sum of the maximum gross weight and empty weight

C. difference between the ramp weight and weight of fuel used for ground maneuvers

D. difference between the maximum take-off weight and the weight of fuel used airborne

A

The minimum grain count for softwoods is _____.

A. six rings per inch

B. eight rings per inch

C. twelve rings per inch

D. sixteen rings per inc

A

The smallest allowable edge distance is _____.

A. 2D

B. 3D

C. 4D

D. 12D

B

The testing medium that is generally used in magnetic particle inspection utilizes a ferromagnetic material that has _____.

A. high permeability and high retentivity

B. high permeability and low retentivity

C. low permeability and high retentivity

D. low permeability and low retentivity

D

Aircraft bolts are usually manufactured with a _____ for the threads.

A. free fit

B. interference fit

C. loose fit

D. medium fit

D

What load causes most rivet failures?

A. Bearing

B. Bending

C. Compression

D. Shear

C

Alloy within the _____ utilize Magnesium as the principal alloying agent; alloy within the _____ utilize Manganese as the principal alloying agent.

A. 3000 series; 5000 series

B. 3000 series; 4000 series

C. 5000 series; 3000 series

D. 5000 series; 4000 series

C

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 with the recommended torque range, the acceptable practice is to _____.

A. tighten below the torque range

B. let it be because it is a normal practice

C. change the washers and try again

D. exceed the maximum recommended torque range by no more than 10%

D

Aircraft bolts with a cross or asterisk on the bolt head are _____.

A. close-tolerance bolts

B. made of aluminum alloy

C. magnetically inspected

D. standard steel bolts

D

Statement 1: The installation of permanent ballast results in a decrease in the aircraft empty weight and an increase in the useful load.

Statement 2: A permanent ballast remains in the aircraft for a long period of time.

A. Both statements are correct.

B. Both statements are incorrect.

C. Statement 1 is correct; Statement 2 is incorrect.

D. Statement 1 is incorrect; Statement 2 is correct.

D

In selecting a torch tip size to be used in welding, the size of the tip opening determines _____.

A. material compatibility

B. temperature of the flame

C. melting point of the filler material

D. amount of heat applied to work

B

One of the purposes of the ailerons is to provide stability about the _____.

A. directional stability

B. longitudinal stability

C. lateral stability

D. horizontal stability

A

Which of the following statements is incorrect?

A. Aluminum Alloys are susceptible to Trans-granular Corrosion.

B. If pure aluminum is used in the construction of an aircraft there will be no problem with corrosion.

C. In the presence of an electrolyte, unprotected Aluminum Alloys will always corrode since there already exists a potential difference between the Aluminum and the alloying agent

(Copper).

D. All of the above statements are incorrect.

C

Which statement is true with regards to icebox rivets?

A. Icebox rivets are kept in an icebox to keep it hard before using it

B. Icebox rivets are made up of 1100 aluminum alloys

C. Icebox rivets must be used within 20 minutes after taking them out of the icebox

D. Icebox rivets are solid rivets used in constructing an ice box.

C

When preparing rivet holes, why is it that the hole is normally in loose fit condition?

A. For easy insertion of the rivets

B. It increases the bearing strength of the metal plate during driving

C. It increase the shearing strength of the rivet during driving

D. It increase the bearing strength of the rivet during driving

B

After the aircraft was removed from the weighing scales, a tare of +2kg was recorded.

How will this affect the scale reading taken during aircraft weighing?

A. Scale reading needs to be adjusted by +2kg.

B. Scale reading needs to be adjusted by -2kg.

C. Scale reading need not be adjusted.

D. Tare value has no effect on the weighing of the aircraft.

D

Vapor Phase Inhibitor (Desiccants) should be used.

A. When re-protecting after corrosion.

B. When degreasing a component.

C. When painting an aircraft.

D. When preserving the engine.

C

When using a color contrast Dye Penetrant kit, and a small crack is suspected in the material:

A. Less developer should be used.

B. Less inhibitor should be used.

C. A magnifying glass is recommended.

D. All of the above process can be performed.

C

When checking an item with the Magnetic Particle Inspection method, circular and longitudinal magnetization should be used to:

A. Evenly magnetize the entire part.

B. Ensure uniform current flow.

C. Reveal all possible defects.

D. Demagnetize the component after inspection

C

Which of these metals can be inspected using the Magnetic Particle Inspection method?

A. Magnesium alloys.

B. Aluminum alloys.

C. Iron alloys.

D. All of the above

D

If a lock washer is not allowed to be used in securing a nut, then what is the recommended alternative?

A. Plain Washer

B. Plain Nut

C. Increase the torque

D. Check Nut

C

When carrying out a bonding test in the presence of an anodic coating, what should you do?

A. Take account of the resistance of the coating.

B. Disregard the resistance of the coating.

C. Penetrate the coating so a good electrical contact is made.

D. None of the above.

B

The 'dwell time' of a Dye-Penetrant NDT inspection pertains to the:

A. Time it takes for a defect to develop.

B. Time the penetrant is allowed to stand.

C. Amount of time the developer is allowed to act.

D. All of the above.

C

When weighing an aircraft, the hydraulic system should be:

A. Empty.

B. Completely full.

C. Filled to 'maximum level' mark.

D. All of the above.

A

What is the purpose of the developer in a Dye Penetrant inspection?

A. It acts as a "blotter" to draw out the penetrant from the crack.

B. It is drawn to the crack by electrostatic attraction.

C. It seeps into the crack and makes it show up.

D. It provides the fluorescent feature of the penetrant.

B

Aircraft must be reweighed:

A. After two years from manufacture only.

B. After two years from manufacture then at periods not exceeding five years.

C. At periods not exceeding five years.

D. When a modification kit has been installed on the aircraft.

C

Which of these non-destructive testing methods is suitable for the inspection of most metals, plastics and ceramics for surface and subsurface defects?

A. Eddy Current Inspection.

B. Magnetic Particle Inspection.

C. Ultrasonic Inspection.

D. Visual Inspection.

B

It is an electrolytic passivation process which increases resistance to corrosion and wear, and provides better adhesion for paint primers and glues than bare metal does.

A. Alodining

B. Anodizing

C. Cladding

D. Priming

B

Longitudinal magnetization of a part can be used to detect defects:

A. Parallel to the lines of magnetization.

B. Perpendicular to the lines of magnetization.

C. Parallel to the longitudinal axis of the part

D. Perpendicular to the lateral axis of the part.

B

When assembling metals of different potential, corrosion may be inhibited by application of:

A. Zinc or chromic acid & assemble while wet.

B. Zinc or barium chromate & assemble while wet.

C. Organic

D. Nothing - assemble bare.

B

Variable load is the weight of:

A. Basic weight plus operating weight.

B. Crew, their baggage and equipment relevant to role.

C. Fuel, oil and non-expendable equipment relevant to role.

D. All of the above.

C

When carrying out a bonding test in the presence of an anodic coating, what should you do?

A. Take account of the resistance of the coating.

B. Disregard the resistance of the coating.

C. Penetrate the coating so a good electrical contact is made.

D. None of the above.

B

Control methods for galvanic corrosion include:

A. Reducing cyclic stressing and increasing cross sectional area.

B. Joining similar metals and using jointing compounds.

C. Ensuring correct heat treatments and correct alloying.

D. All of the above.

C

In order for Dye Penetrant Inspection to be effective, the material being checked must:

A. Be magnetic.

B. Be non-magnetic.

C. Have surface cracks.

D. All of the above.

B

A non-destructive test which can be used on ferrous materials only

A. Liquid penetrant

B. Magnetic Particle

C. Ultrasonic

D. Xray

A

Ultrasonic flaw detectors use:

A. High frequency sound waves.

B. Magnetic field.

C. Gamma-rays.

D. X-rays

B

Circular magnetization of a part can be used to detect defects:

A. Parallel to the concentric circles of magnetization.

B. Perpendicular to the concentric circles of magnetization.

C. Parallel to the lateral axis of the part

D. Perpendicular to the longitudinal axis of the part.

A

Corrosion removal of very mild from Aluminum Alloys can be performed using:

A. Abrasive cleaner (does not contain Chlorine).

B. Steel wire brush

C. Steel wool.

D. Any of the above.

D

The best way to prevent corrosion formation is to eliminate:

A. Electrode potential difference

B. Preventing the introduction of an electrolyte.

C. Dissimilar metal contact.

D. All of the above.

A

Increasing the weight of an aircraft.

A. Increases the Take-off roll.

B. Decreases the Stalling speed.

C. Decreases the glide range.

D. All of the above.

A

Which of the following defects could not be detected by Eddy Current NDT inspection?

A. A crack in a glass fibre reinforced plastic cowl.

B. A crack in a magnesium alloy wheel casting.

C. Heat damage of a Haynes Alloy turbine blade.

D. All of the above.

D

When Payload is subtracted from Zero Fuel Weight the result is:

A. Landing Weight.

B. Takeoff Weight.

C. Ramp Weight.

D. Basic Empty Weight

D

When Take-off Weight is subtracted from the Ramp Weight, the result is:

A. Payload

B. Usable Fuel

C. Fuel used during flight

D. None of the above.

A

Increasing the weight of an aircraft.

A. Increases the Take-off roll.

B. Decreases the Stalling speed.

C. Decreases the glide range.

D. All of the above.

D

A liquid penetrant test cannot:

A. Be used on Ferrous materials.

B. Be used on non-metallic surfaces.

C. Be used on porous materials.

D. Locate subsurface discontinuities.

C

To check the structure of a wing, which NDT method is used?

A. Dye Penetrant Inspection.

B. Magnetic Particle Inspection.

C. Radiographic Inspection.

D. Visual Inspection.

D

When Payload is subtracted from Zero Fuel Weight the result is:

A. Landing Weight.

B. Takeoff Weight.

C. Ramp Weight.

D. Basic Empty Weight

D

When Take-off Weight is subtracted from the Ramp Weight, the result is:

A. Payload

B. Usable Fuel

C. Fuel used during flight

D. None of the above.

C

Any and every type of permanent deformation or alteration to any cross-section of a structural component.

A. Erosion

B. Corrosion

C. Damage

D. Delamination

D

When should the developer be applied to the component?

A. Before applying penetrant.

B. Before the penetrant dries.

C. After thoroughly cleaning the component.

D. After excess penetrant has been removed.

A

Which of the following NDT methods requires that the orientation (or direction) of the defect be known before the test can commence?

A. Magnetic Particle and Ultrasonic Inspection.

B. Ultrasonic and Dye Penetrant Inspection.

C. Visual and Dye Penetrant Inspection.

D. X-Ray and Magnetic Particle Inspection.

A

Which of the following defects could not be detected by Eddy Current NDT inspection?

A. A crack in a glass fibre reinforced plastic cowl.

B. A crack in a magnesium alloy wheel casting.

C. Heat damage of a Haynes Alloy turbine blade.

D. All of the above.

D

Powerplant preservation is performed by:

A. Draining all the Engine Oil from the engine.

B. Introduction of suitable preservatives is introduced into the engine to coat internal surfaces.

C. Desiccants are placed at the Engine Inlet and Exhaust Areas which are plugged by inlet and exhaust covers.

D. All of the above.

A

The type of aircraft structure which are essential to keep the airplane in an airworthy condition.

A. Primary

B. Secondary

C. Both Primary and Secondary

D. Tertiary

C

Which statement is true regarding wing construction?

A. All wings skin is made up of the same material

B. All wings have at least two spars

C. The spars of the wings are the main load carrying member

D. All wings are cantilever type

C

Which type of damage will require replacement?

A. Allowable damage

B. Non-allowable damage

C. Non-repairable damage

D. Repairable damage

C

Which SRM chapter provides information about Nacelles and Pylons?

A. 52

B. 53

C. 54

D. 55

B

Control methods for galvanic corrosion include:

A. Reducing cyclic stressing and increasing cross sectional area.

B. Joining similar metals and using jointing compounds.

C. Ensuring correct heat treatments and correct alloying.

D. All of the above.

D

Specify the corrosion prone areas:

A. Engine Inlet and Exhaust Areas

B. Lavatories and Food Service Areas

C. Bilge Areas

D. All of the above

B

This process is an electrolytic treatment (of Aluminum) where the part is immersed in a lead vat containing a solution of Chromic Acid and Water:

A. Alodizing

B. Anodizing

C. Cladding

D. Decarbonization

B

Aircraft measurements aft of the datum are.

A. Either positive or negative.

B. Positive.

C. Negative.

D. None of the above.

B

An aircraft which has its C of G forward of the Forward Limit.

A. The take-off run will not be affected.

B. Will have a longer take-off run.

C. Will have a shorter take-off run.

D. Will have a high Stall Margin at take-off.

A

The useful load of the aircraft consist of:

a. Crew, usable fuel, passenger and cargo

b. Crew, usable fuel, oil and fixed equipment

c. Crew, total fuel weight, total oil weight, passenger and cargo

d. Crew, passenger, usable fuel, oil, cargo and fixed equipment.

B

Yield strength, tensile strength, and hardness of a metal increase with increasing percent cold work; ductility

a. increases

b. decreases

c. doesn't change

d. changes tremendously

A

The bond where electrically charged ions are formed by the transference of valence electrons from one atom type to another. This type of bonding is found ceramic materials

a. ionic

b. covalent

c. dative

d. Van der Waals