Q) What kind of work does a bulldozer do? How is its mechanism set up?
Q) Are there any radio-controlled bulldozers?
Q) Can bulldozers run on the public streets?
Q) Why doesn't a small bulldozer have a ripper?

Hydraulic excavator

Q) Are there any power shovels that have a bucket without a jag?
Q) What is the hydraulic auger?
Q) Why doesn't the oil in the cylinder of a hydraulic excavator spill?
Q) Where did the name Jumbo come from?
Q) Why do we call hydraulic excavators Jumbo?
Q) What is a backhoe and what do you use it for?
Q) Tell me about different buckets.
Q) Are there different kinds of buckets for micro shovels?
Q) What is the maximum gradient PC200 can climb?
Q) Can a power shovel push earth?
Q) How many turns can a power shovel make before it comes off?
Q) How far can a hydraulic excavator reach when it scraps a tall building?
Q) Why doesn't a muddy soil excavator sink in the water?
Q) How many cylinders does a hydraulic excavator have at most?
Q) What does PC stand for in the model number of the power shovels? How many different numbers are there anyway?
Q) Why doesn't the large hydraulic shovel have a blade while the small one does?

Dump trucks

Q) Why does the loading part of a dump truck lift like a slide?
Q) Are there any dump trucks with six wheels?
Q) Do the biggest dump trucks carry only sand and rocks?
Q) What do trucks carry?

Cranes

Q) Why do stretching parts of cranes come in different shapes? What is the purpose of a knit like stretching arm?
Q) How do you move construction equipment to the top of a building?
Other construction equipment
Q) What kind of equipment is used for road construction?
Q) What does the driver's seat of motor grader look like?
Q) How does a skid steer loader turn?
Q) What does a stabilizer do?
Q) What is a soil converter?
Attachments and parts
Q) How many kinds of attachments are there?
Q) What is the purpose of the lifting magnet?
Q) Does a crawler get worn off just like a pair of shoes?
Q) How does a power shovel's engine look like?
Cranes

Take a look at this.

How to build, assemble, and transport construction machine

Q) Where are they built?
For Example
World's largest Crane
Another view

Mobile Crane Inspection
Overhead Crane Inspection
Aerial Lift Inspection
Fork Lift Inspection
World wide,
How many cranes are there?

Concrete Mixer Truck

Q) How do concrete mixer trucks work?
Q) What is a Concrete Mixer?
Q) What Is a Backhoe Loader?

Q) How many different kinds of construction vehicles are there?
Q) How much do they cost?
Q) What are the good parts of construction equipment? How about the dangerous parts?
Q) Does it take light oil?
Q) What do you imagine future construction vehicles will be like?
Q) What was the world's first construction machine?
Q) When was the world's first hydraulic shovel made?
Q) What is the capacity for Komatsu's biggest hydraulic shovel?
Q) How big are the tires?
Q) How many pounds can they carry?
Q) How fast can they go?
Q) How fast does the average bulldozer go?