9–53.
What type of lead is connected to
the boom tip through the use of
lead adapters?
1.
Swinging
2.
Underhung
3.
Extended four-way
4.
Overhead
9-54.
During what time period should
lead adapter bolts be checked for
tightness?
1.
At the beginning of each day
2.
At the beginning of each week
3.
At the beginning of each month
4.
At the beginning of each shift
9-55.
What component is used to hold
leads at a vertical for driving
bearing piles or to hold the leads
at an angle for driving batter
piles?
1.
A tag line winder
2.
A bridle assembly
3.
A catwalk
4.
A boom mast
9-56.
What type of lead uses a sliding
boom tip connector for connecting
the boom tip of the crane to the
leads?
1.
Swinging
2.
Underhung
3.
Extended four-way
4.
Overhead
9-57.
What type of lead has an advantage
over other leads because it bears
the entire bottom of the pile cap
to the piling?
1.
Swinging
2.
Spud
3.
Extended four-way
4.
Underhung
Learning Objective:
Recognize
the principles and components
of pile–driving hammers.
9-58.
9-59.
9-60.
9-61.
9-62.
9-63.
The noise generated by a pile–
driving operation can cause
hearing loss.
1.
True
2.
False
The DE-10 hammer is lifted and
started by a single crane line
connected to what hammer component?
1.
Fuel pump assembly
2.
Belleville spring assembly
3.
Trip mechanism
4.
Thrust bearing
The compression of the trapped
air in the DE-10 hammer creates
a preloading force upon which
of the following components?
1.
Anvil
2.
Drive cap
3.
Pile
4.
All of the
What component
is designed to
above
in the DE–10 hammer
break or bend in the
event the operator lowers the trip
mechanism to low during hammering
operations?
1.
Dowel pin
2.
Safety link
3.
Throttle shaft
4.
Lifting hook
On a diesel hammer,
by gravity from the
gasoline is fed
main fuel tank
through the filter cartridge.
1.
True
2.
False
Lubricating oil for a diesel hammer
should have a flash point of what
degrees,
in Fahrenheit?
1.
225°F to 250°F
2.
325°F to 350°F
3.
425°F to 450°F
4.
525°F to 550°F
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