Screw Styles in the Building Trade

What is the purpose of having different screw styles in the building trade?

• To match aesthetic preferences

• To suit different applications

• To reduce manufacturing costs

• To increase the weight of structures

Answer explanation

Different screw styles are designed to suit various applications, ensuring optimal performance and safety in construction. Each style serves specific functions, making it essential to choose the right one for the task.

Which screw style is typically used with a washer?

• Washer Hex Head

• Button Head

• Flange Head

• Pan Head

Answer explanation

The Washer Hex Head screw is designed to be used with a washer, providing a larger surface area to distribute load and prevent damage to the material being fastened. This makes it the ideal choice for applications requiring a washer.

What is the shape of a "Hex Head" screw?

• Round

• Hexagonal

• Flat

• Oval

Answer explanation

A "Hex Head" screw has a head shaped like a hexagon, which allows for better grip and torque when using a wrench. Therefore, the correct answer is "Hexagonal".

Which screw style is described as having an oval, raised head?

• Countersunk (Oval), Raised

• Cheese Head

• Fillister Head

• Flange Head

Answer explanation

The screw style described as having an oval, raised head is known as 'Countersunk (Oval), Raised'. This design allows for a flush finish with the surface, distinguishing it from other styles like Cheese Head or Fillister Head.

What is a "Cheese Head" screw characterized by?

• Flat top

• Domed top

• Cylindrical top

• Hexagonal top

Answer explanation

A "Cheese Head" screw is characterized by its cylindrical top, which distinguishes it from other screw types that may have flat, domed, or hexagonal tops.

Which material is suitable for high moisture areas and is corrosion resistant?

• Steel

• Brass

• Chrome

• Sheradised

Answer explanation

Brass is suitable for high moisture areas due to its corrosion resistance, making it ideal for environments where other metals like steel may rust or corrode.

Which material is described as having a good lifespan and being cheap?

• Brass

• Stainless steel

• Zinc

• Chrome

Answer explanation

Zinc is known for its good lifespan and low cost, making it an economical choice for various applications. Unlike brass or stainless steel, which can be more expensive, zinc offers durability at a budget-friendly price.

Which material is used for exposed bathroom cleaning?

• Brass

• Stainless steel

• Zinc

• Sheradised

Answer explanation

Stainless steel is preferred for exposed bathroom cleaning due to its resistance to rust and corrosion, making it durable and easy to maintain. Other materials like brass and zinc may not withstand moisture as effectively.

Which head type was originally designed in the 1930s to prevent over-tightening?

• Flat blade head

• Phillips head

• Pozidriv head

• Star head

Answer explanation

The Phillips head was designed in the 1930s to allow for better torque control and prevent over-tightening, making it a significant improvement over earlier designs like the flat blade head.

Which screw size range corresponds to a brown plug?

• 6-8

• 8-10

• 10-14

• 14-18

Answer explanation

A brown plug corresponds to screw sizes in the range of 10-14. This classification helps in identifying the appropriate screw size for various applications, making 10-14 the correct choice.