Pile Driving Core Examiners Answers And Questions Set A.pdf

PILE DRIVING CORE EXAMINERS ANSWERS AND
QUESTIONS SET A+
✔✔The attachment that holds the pile firmly in place during the upstroke of the ram and
prevents distortion to the top of the pile.
Select one:
a. Driving Head Attachments
b. Drive Cap (Helmet)
c. Ram Point
d. Pile-Driving Shoe - ✔✔driving head attachments

✔✔The thickness of the metal of a pile.
Select one:
a. Penetration Test
b. Load Test
c. Wall Thickness
d. Driving Plan - ✔✔wall thickness

✔✔Depth or length of pile specified to theoretically develop the required load bearing or
uplift capacity of the soil, the required lateral strength or a desired bearing strata.
Select one:
a. Minimum Penetration
b. Centrifuge
c. Design Load
d. Penetration Resistance - ✔✔minimum penetration

✔✔The soil inside a pipe pile driven open-end.
Select one:
a. Pile Tip
b. Pile Butt
c. Foot of a Pile
d. Plug - ✔✔plug

,✔✔A steel collar used for splicing pipe piles. Both pieces of pipe fit inside the collar and
after the first blow of the hammer, the fit is tight due to the taper of the inside of the
collar. Does not normally require welding; pipe is held by friction.
Select one:
a. Striker Plate
b. Vibratory Driver/Extractors
c. Drive-Fit Collar
d. Cofferdam - ✔✔drive fit collar

✔✔A pile with spiral blade fixed on a shaft or a shaped precast pile, which is screwed
into ground by a rotating force.
Select one:
a. Screw Pile
b. Precast Pile
c. Cast-In-Place Pile
d. Pedestal Pile - ✔✔screw pile

✔✔Stiffest concrete has zero slump and the most fluid concrete have slums in excess
of 8 in.
Select one:
True
False - ✔✔true

✔✔A hydraulic hammer operates on the differential pressure of compresses air.
Select one:
True
False - ✔✔false.
hydraulic fluid

✔✔The relative portions of the resistance contributed by either the skin friction or end
bearing may vary depending more on the type of pile.
Select one:
True
False - ✔✔false.
The relative portions of the resistance contributed by either the skin friction or end
bearing may vary from almost 0 to 100%, depending more on the SOIL TYPEmthan on
the type of pile.

✔✔A way of reducing driving stresses on a pile is by inserting an adequate cushioning
material between the pile driver's driving cap and the top of the concrete pile.
Select one:
True
False - ✔✔True

, ✔✔When the depth of support is large or when the loads are great, it is necessary to
incorporate a tieback or bracing system with the sheet piles.
Select one:
True
False - ✔✔true

✔✔Which type of pile hammer has an efficiency of 90% or better in delivering energy to
the pile?

Select one:
a. Single-Acting Hammers
b. Drop Hammer
c. Diesel Hammers
d. Hydraulic Impact Hammers - ✔✔hydraulic impact hammers

✔✔Which type of pile is most efficient as a friction pile?

Select one:
a. Prestressed Concrete Piles
b. Steel H-Piles
c. Steel Pipe Piles
d. Timber Piles - ✔✔steel pipe piles

✔✔Which type of pile will last a limited number of years if it is not treated toward off
decay?

Select one:
a. Treated Timber Piles
b. Precast-Prestressed Concrete Piles
c. Cast-in-Place Concrete Piles
d. Untreated Timber Piles - ✔✔timber piles

✔✔What type of leads system has a pivot point at the crane's boom top and a brace at
the bottom that attaches to the crane?

Select one:
a. Hydraulic Leads
b. Swing Leads
c. Fixed Leads - ✔✔fixed leads

✔✔Which type of pile hammer performs especially well in cohesive or very dense soil
layers?

Select one:
a. Diesel Hammers