CPC CPC Construction Equipment & Temporary Structures

Question 1

What is the primary factor that determines a crane's rated lifting capacity at a given radius?

Accepted Answer

Boom angle and load radius

Answer

Engine horsepower

Answer

Track or tire pressure

Answer

Hydraulic fluid temperature

Question 2

Which excavation support system uses horizontal steel members braced against the trench walls with no external tiebacks?

Accepted Answer

Braced cut (internally braced excavation)

Answer

Tie-back wall system

Answer

Slurry wall

Answer

Soldier pile and lagging

Question 3

What is the maximum safe working angle for a suspended scaffolding rope on a swing stage scaffold?

Accepted Answer

No more than 15 degrees from vertical

Answer

Up to 45 degrees from horizontal

Answer

Exactly 90 degrees to the face

Answer

No more than 30 degrees from vertical

Question 4

A tower crane's 'out-of-service' wind speed rating is important because:

Accepted Answer

It defines the wind speed at which the crane must be weathervaned and unloaded

Answer

It sets the maximum concrete pour volume

Answer

It determines the crane's maximum lifting height

Answer

It establishes daily lubrication intervals

Question 5

What is the purpose of a 'shoring' system in below-grade construction?

Accepted Answer

Temporarily support loads above while permanent structure is built below

Answer

Provide temporary electrical power

Answer

Direct groundwater flow

Answer

Compact backfill

Question 6

Which type of dewatering system lowers the groundwater table by pumping from a series of closely spaced small-diameter wells connected to a header pipe?

Accepted Answer

Wellpoint system

Answer

Sump pumping

Answer

Electro-osmosis

Answer

Deep well drainage