Part-66 Module 7 practice test

Question 1

Which type of extinguisher is suitable for a fire in live electrical equipment?

Accepted Answer

Carbon dioxide (CO₂)

Answer

Water spray (fine mist)

Answer

Foam (AFFF) solution

Question 2

What is the purpose of a tool control system such as shadow boards?

Accepted Answer

To show at once when a tool is missing

Answer

To make the workshop look tidy

Answer

To reduce the cost of buying tools

Question 3

A vernier caliper's main scale shows 24 mm and the 0.02 mm vernier lines up at the 17th division. What is the reading?

Accepted Answer

24.34 mm

Answer

24.17 mm

Answer

41 mm

Question 4

On an engineering drawing, what does a thin dashed line normally represent?

Accepted Answer

A hidden edge or outline

Answer

A centre line

Answer

A visible outline

Question 5

What is an interference fit?

Accepted Answer

Shaft larger than hole; force or heat needed

Answer

A fit with a small gap between the parts

Answer

A fit that allows free rotation of the shaft

Question 6

What does a continuity test check?

Accepted Answer

An unbroken low-resistance path

Answer

That the insulation is in good condition

Answer

The voltage present at a connector

Question 7

What does an insulation resistance test check?

Accepted Answer

That insulation resistance is high enough

Answer

That a wire has low resistance along its length

Answer

The current rating of the wire

Question 8

Why should rivet holes be deburred after drilling?

Accepted Answer

Burrs stop sheets seating and can start cracks

Answer

To enlarge the holes to the final rivet size

Answer

To mark the hole positions for the next sheet

Question 9

What should be done after replacing a hydraulic line?

Accepted Answer

Bleed if needed and leak check under pressure

Answer

Nothing, if the fittings look tight

Answer

Paint the new line before pressurising

Question 10

How should a bearing with an interference fit be removed from a shaft?

Accepted Answer

With a puller acting on the inner ring

Answer

By hammering on the outer ring

Answer

By heating the shaft with a flame

Question 11

What is bend allowance?

Accepted Answer

The material length used in the bend

Answer

The extra thickness formed at the bend

Answer

The angle the sheet is bent through

Question 12

Why are heat-treatable aluminium alloy parts often formed in the annealed (-O) or freshly quenched (-W) condition?

Accepted Answer

They are softer and less likely to crack

Answer

They are stronger in these conditions

Answer

These conditions are permanent

Question 13

What is the main difference between brazing and welding?

Accepted Answer

Brazing does not melt the base metal

Answer

Brazing uses no heat at all

Answer

Welding never uses a filler metal

Question 14

What is the moment of an item in weight and balance?

Accepted Answer

Weight multiplied by arm

Answer

Weight divided by arm

Answer

Arm divided by weight

Question 15

What is the purpose of mooring (tying down) a parked aircraft?

Accepted Answer

To stop wind moving or damaging it

Answer

To deter theft overnight

Answer

To keep the tyres properly inflated

Question 16

Before towing an aircraft with a towbar, what is commonly required on aircraft with nose wheel steering?

Accepted Answer

Disconnect or bypass the steering

Answer

Start the APU for hydraulic power

Answer

Set the parking brake on firmly

Question 17

What is the correct sequence for dye penetrant inspection?

Accepted Answer

Clean, penetrant, dwell, remove, develop, inspect

Answer

Develop, penetrant, inspect, then clean

Answer

Penetrant, then inspect at once, no cleaning

Question 18

What should be used to blend out a small scratch in an aluminium skin within allowable limits?

Accepted Answer

Fine abrasives, a gradual blend, then protection

Answer

A stainless steel wire brush and polish

Answer

A grinding disc to remove the scratch fast

Question 19

After a lightning strike, what should be inspected?

Accepted Answer

Entry and exit points, wicks, bonding and avionics

Answer

The paint on the radome only

Answer

Nothing if the landing was normal

Question 20

What does a certificate of release to service (CRS) confirm?

Accepted Answer

Maintenance done to approved data; ready for service

Answer

That the aircraft meets its type design when new

Answer

That the operator's crew are trained on the type