ETC ETC Construction Methods & Equipment 2

Question 1

What is the purpose of formwork in concrete construction?

Accepted Answer

To mold and support fresh concrete until it gains sufficient strength

Answer

Formwork is a temporary mold that shapes fresh concrete and supports its weight until the concrete hardens enough to be self-supporting.

Question 2

What does the Proctor compaction test determine?

Accepted Answer

The optimum moisture content and maximum dry density of a soil

Answer

The Proctor test determines the relationship between moisture content and dry density, identifying the optimum moisture for maximum compaction.

Question 3

What does the rated capacity of a crane represent?

Accepted Answer

The maximum load the crane is designed and tested to lift at a given radius

Answer

Rated capacity is the manufacturer's maximum tested and certified load for the crane at a specific boom angle, radius, and configuration.

Question 4

What type of concrete admixture is used to accelerate setting time in cold weather?

Accepted Answer

Calcium chloride or non-chloride accelerator

Answer

Accelerating admixtures such as calcium chloride speed up cement hydration, helping concrete gain strength faster in cold conditions.

Question 5

What is the purpose of a control joint in masonry construction?

Accepted Answer

To allow for thermal and shrinkage movement without uncontrolled cracking

Answer

Control joints are planned discontinuities that create a weak plane where movement cracks will occur in a predictable, manageable location.

(ETC) Engineering Technician Certification Practice Test