Objectives

Identify the heavy equipment used in highway and bridge construction and describe their uses.

• Excavators, used for digging and moving earth

• Cranes, used for lifting heavy materials

• Bulldozers, used for pushing large quantities of soil

• All of the above

Answer explanation

All of the listed equipment—excavators, cranes, and bulldozers—are essential in highway and bridge construction. They each serve specific functions: excavators for digging, cranes for lifting, and bulldozers for moving soil.

Identify heavy equipment used in excavation and grading.

• Bulldozer

• Crane

• Forklift

• Dump Truck

Answer explanation

A bulldozer is specifically designed for excavation and grading tasks, making it the correct choice. Cranes and forklifts serve different purposes, while dump trucks are used for transporting materials.

Which type of tractor is shown in image (A)?

• Utility Tractor

• Quad-Track Tractor

• Wheeled Articulated Tractor with Scrapers

Answer explanation

The image shows a Utility Tractor, which is designed for a variety of tasks on farms, including hauling and towing. Its compact size and versatility distinguish it from Quad-Track and Wheeled Articulated Tractors.

A power take-off (PTO) shaft allows tractors to provide power for (a)   .

• Scrapers

• Attachments

• Wheels

Answer explanation

A power take-off (PTO) shaft is designed to transfer power from a tractor to various attachments, such as mowers or tillers, enabling them to operate effectively. Therefore, the correct answer is 'Attachments'.

Which of the following attachments can be fitted onto a backhoe loader?

• Rippers

• Augers

• Hydraulic breakers

• All of the above

Answer explanation

All of the listed attachments—rippers, augers, and hydraulic breakers—can be fitted onto a backhoe loader, making 'All of the above' the correct choice.

Fill in the blank: Numerous attachments can be fitted onto a backhoe loader, including rippers, augers, and ________.

• hydraulic breakers

• buckets

• plows

• sweepers

Answer explanation

Hydraulic breakers are commonly used attachments for backhoe loaders, ideal for breaking up concrete and hard surfaces. While buckets and other options exist, hydraulic breakers specifically enhance the loader's versatility in demolition tasks.

What is the part labeled as 'DIPPER (BUCKET)' used for in a track excavator?

• Digging materials

• Moving materials

• Stabilizing the excavator

• Lifting heavy loads

Answer explanation

The 'DIPPER (BUCKET)' in a track excavator is primarily used for digging materials and moving them. It scoops up earth or debris and transports it, making it essential for excavation tasks.

Fill in the blank: Track excavators are used where the machine does not have to travel to, from, or around the site for any great ________.

• distance

• speed

• height

• weight

Answer explanation

Track excavators are designed for heavy-duty tasks on-site. The blank refers to 'distance' because these machines are typically used where they don't need to travel far, making them efficient for localized work.

What type of excavators can be driven on public highways and do not have to be moved on a trailer?

• Crawler excavators

• Truck- or wheel-mounted telescoping-boom excavators

• Backhoe loaders

• Skid-steer loaders

Answer explanation

Truck- or wheel-mounted telescoping-boom excavators can be driven on public highways without needing a trailer, unlike crawler excavators, backhoe loaders, and skid-steer loaders, which typically require transport.

The purpose of notifying the One-Call System (811) before trenching is to:

• ensure safety and prevent damage to underground utilities.

• comply with legal requirements.

• inform local authorities about the work.

• schedule the work with other contractors.

Answer explanation

Notifying the One-Call System (811) before trenching is crucial to ensure safety and prevent damage to underground utilities, making it the primary reason for this notification.