Hydraulic Derrick and Digging
Equipment Book #7 Exam Questions &
Answers (Grade A+)
The __________ attaches a digger derrick to a truck body. -
correct answer ✅Pedestal
True or False: The hook radius of a digger derrick refers to the
distance from the truck that the hook can reach by unwinding the
winch line. -
correct answer ✅False
The auger is held in it stowed position by a_____ and also
sometimes buy a______ -
correct answer ✅(A) Stow Lock pin
(B) Mechanical Pin
List Three Factors that determine the maximum lift capacity of a
digger derrick. -
correct answer ✅1. Stability of the truck and surface
2. Structural strength of the derrick
3. Power of the hydraulic system.
, Hydraulic Derrick and Digging
Equipment Book #7 Exam Questions &
Answers (Grade A+)
True or false. On a solid level surface a digger Derek should always
be able to lift its maximum capacity. -
correct answer ✅False
If a utility pool is 60 feet long, how deep should the hole be dug to
set the pole? -
correct answer ✅8 Feet
"10% plus 2 feet"
Why should a digger derrick be positioned so that a hole can be dug
off the back of the truck? -
correct answer ✅Operator has the greatest visibility off the rear of
the truck.
True or false. When the pole is in a vertical position, pole grabbers
are used to guide and stabilize the pole. -
correct answer ✅True
Define cork screwing as it applies to a digger Derek -
correct answer ✅The Auger catching the ground and pulling the
boom down.
Equipment Book #7 Exam Questions &
Answers (Grade A+)
The __________ attaches a digger derrick to a truck body. -
correct answer ✅Pedestal
True or False: The hook radius of a digger derrick refers to the
distance from the truck that the hook can reach by unwinding the
winch line. -
correct answer ✅False
The auger is held in it stowed position by a_____ and also
sometimes buy a______ -
correct answer ✅(A) Stow Lock pin
(B) Mechanical Pin
List Three Factors that determine the maximum lift capacity of a
digger derrick. -
correct answer ✅1. Stability of the truck and surface
2. Structural strength of the derrick
3. Power of the hydraulic system.
, Hydraulic Derrick and Digging
Equipment Book #7 Exam Questions &
Answers (Grade A+)
True or false. On a solid level surface a digger Derek should always
be able to lift its maximum capacity. -
correct answer ✅False
If a utility pool is 60 feet long, how deep should the hole be dug to
set the pole? -
correct answer ✅8 Feet
"10% plus 2 feet"
Why should a digger derrick be positioned so that a hole can be dug
off the back of the truck? -
correct answer ✅Operator has the greatest visibility off the rear of
the truck.
True or false. When the pole is in a vertical position, pole grabbers
are used to guide and stabilize the pole. -
correct answer ✅True
Define cork screwing as it applies to a digger Derek -
correct answer ✅The Auger catching the ground and pulling the
boom down.
