CASA Part 66: Screwdriver Types and Uses

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What is the primary purpose of screwdrivers?

To release catches and open cowlings

To serve as a lever for prying open stuck parts

To tighten or loosen screws (correct)

To function as a punch or chisel

What is the main characteristic of screwdrivers suitable for slotted screw heads?

They consist of a handle, shank, and blade (correct)

They are classified by the width of the handle

They have a square section shank

They have a high-carbon or alloy steel blade

What is the purpose of a spanner on a large screwdriver?

To provide a comfortable grip on the handle

To apply extra torque when loosening screws (correct)

To increase the torque when tightening screws

To serve as a lever for prying open stuck parts

What is a common classification of screwdrivers?

By the type of screw head they are suitable for Signup and view all the answers

What is the term for a large, long-shanked screwdriver?

GS (general screwdriver) Signup and view all the answers

What is a common mistake when using screwdrivers?

Using a screwdriver as a chisel or pry bar Signup and view all the answers

What is the primary purpose of the serrations on the 'undo' faces of some bits?

To prevent the tool from lifting out when torque is applied Signup and view all the answers

What is a characteristic of the ratchet mechanism in a ratchet screwdriver?

It can operate in both clockwise and anti-clockwise rotations, and can also be locked Signup and view all the answers

What is the advantage of the pump action screwdriver?

It allows for rapid screw rotation in both directions Signup and view all the answers

Why are Yankee screwdrivers not recommended for aircraft use?

They are prone to slipping out of the slot during pumping Signup and view all the answers

What is the primary advantage of the offset screwdriver?

It is handy when there is not sufficient space to work using a conventional screwdriver Signup and view all the answers

What is a characteristic of the blade in a ratchet screwdriver?

It is removable, allowing for various sizes and types to be used Signup and view all the answers

What is the purpose of the spring-loaded ball in a socket?

To retain the socket in the drive aperture Signup and view all the answers

What is the primary use of impact-grade sockets?

For use with hightorque machine drivers and impact tools Signup and view all the answers

What is the main difference between standard sockets and deep sockets?

The length of the socket Signup and view all the answers

What is the purpose of a flex socket?

To provide additional clearance between the socket drive and the socket Signup and view all the answers

What is the typical drive size for aviation sockets?

Six- or 12-point Signup and view all the answers

What is the primary difference between standard and semi-deep sockets?

The length of the socket Signup and view all the answers

What is the primary purpose of the 15° angled head and jaw openings in open-ended spanners?

To enable a new grip to be made on the nut or bolt head by turning the spanner over Signup and view all the answers

What is the correct way to use an open-ended spanner when pushing is required?

Use an open palm to avoid bruising the knuckles Signup and view all the answers

What is the advantage of using an open-ended spanner over other types of spanners?

It can be fitted to the nut or bolt from the side Signup and view all the answers

Why are smaller open-ended spanners shorter in overall length?

To reduce the possibility of applying too great a force to the bolt Signup and view all the answers

What is the benefit of pulling the spanner rather than pushing when possible?

It reduces the possibility of applying too great a force to the bolt Signup and view all the answers

What is the typical feature of spanners manufactured to a British Standard?

They produce less twisting force with a given amount of pull Signup and view all the answers

In which direction should you turn a right-hand thread when removing a broken bolt/stud?

Anti-clockwise Signup and view all the answers

What is the primary function of thread penetrant when disassembling components?

To lubricate and act as a releasing agent Signup and view all the answers

Which type of vice is typically used for holding work for hand processing, such as marking out and shaping with hand tools?

Bench Vice Signup and view all the answers

What is the primary purpose of a machine vice in a workshop?

To hold components in position for machine operations Signup and view all the answers

What is the likely consequence of applying extra leverage to a spanner when removing a broken bolt or stud?

The bolt or stud will shear off Signup and view all the answers

What is the recommended duration for allowing thread penetrant to stand before attempting to remove a broken bolt or stud?

Overnight Signup and view all the answers