RI OPERATOR EXAM questions with
complete solutions rated A+
On a two-wheel drive TLB, about how much of the machine's weight is in the backhoe
assembly? - ANS ✔1/3
What causes the weight of the backhoe attachment to transfer the machine's center of gravity
upward as well as to the rear when compared to other machines? - ANS ✔Its location, high
above the ground and far behind the wheelbase
Why should the operator alter the TLB's dimensions? - ANS ✔To improve stability
To improve safety
To improve maneuverability
A 32% slope will rise how many feet vertical in 100ft horizontal? - ANS ✔32 Feet
On a two wheel drive machine. why is it important to keep as much weight and traction as
possible on the rear wheels? - ANS ✔The brakes are only on the rear wheels.
If you must drive up or back down a grade with the hoe on the downward end, you should: -
ANS ✔Stabilize the front wheels by filling the loader bucket with dirt or heavy material.
Raising the loader bucket will: - ANS ✔Shorten the machine
Shift the weight up and to the rear
Decrease the TLB's Stability
,Features such as 4 wheel-drive, and large front tires tend to destabilize the TLB. - ANS ✔False -
the weight of the drive assembly will shift the weight forward slightly, and make the machine
more stable.
A machine with a hydraulic breaker attached to the backhoe will have _________ weight on the
front tires? - ANS ✔Less
A 3/4:1 slope is commonly used in stable soils for sloping temporary excavations, when
specified by the engineers. - ANS ✔True
Operating a TLB (or any kind of heavy equipment) is a construction trade that is unique in the
construction industry: - ANS ✔Because of the high weight involved.
The universal forces and principles are: - ANS ✔Constant &
Variable
A simple slope that rises 1 ft vertical for every 10 ft horizontal is expressed as: - ANS ✔10%
The great weight of the TLB dictates that the other forces and principles acting on the machine
will be minimal. - ANS ✔False - The great weight of the TLB dictates that the other forces and
principles acting on the machine will also be of great magnitude.
When weight and motion are combined the result is: - ANS ✔Momentum
When momentum and downhill forces are combined they can become stronger than the forces
that are keeping the machine under control. - ANS ✔True
Which of the following are true of a 2:1 slope? - ANS ✔Commonly used slope for stability
between building pads.
,Loader backhoes are almost never used on a slope this steep.
A 2:1 slope is a 1 ft rise for every 2 ft horizontal.
Downhill force is the combination of weight and momentum. - ANS ✔False - Downhill force is
the result of the combination of weight and pitch of slope.
When on a downhill, a bicycle rider will be propelled by the center of gravity. - ANS ✔True
When operating a TLB a loss of traction will result in: - ANS ✔Reduced productivity
Loss of control
Loss of safety
Friction usually occurs between the bucket (or cutting edge) and the ground. - ANS ✔True
Raising the loader bucket or extending the back hoe will move the center of gravity to the rear
of the machine. - ANS ✔True
The power of strength of downhill force by the weight of the object and the slope it is resting
on. - ANS ✔True
A 1:1 slope is commonly used in temporary excavations as per OSHA regulations. - ANS ✔True
There is _______ universal forces and principles that determine the safe operation of a TLB. -
ANS ✔8
On flat level ground, downhill force is an important consideration for the operator to consider
when planning the job. - ANS ✔False - On flat level ground downhill force is not a factor
because there is no slope present.
, A 100% slope = ________ degrees - ANS ✔45
A 1% slope is commonly used for drainage on paved surfaces such as parking lots. - ANS ✔True
A 50% slope is equal to 1:1 slope. - ANS ✔False - A 50% slope is equal to a 2:1 slope
A 2% slope is commonly required for sheet flow drainage such as grading around houses to
ensure positive drainage. - ANS ✔True
On a 20% slope, how much vertical rise would there be when the horizontal measurement was
100 feet. - ANS ✔20 feet
The center of gravity of an object is determined by: - ANS ✔The weight of the object.
The shape of the object.
How the weight is distributed.
When using the loader, the base of the machine is the entire area inside of where the tires
contact the ground. - ANS ✔True
The vertical line indicates the force of gravity and where the COG is in relation to the base. - ANS
✔True
The high weights involved in operating heavy equipment: - ANS ✔Bring with them the
unbending laws of physics.
One common element that should be present in every TLB operation is smoothness. - ANS
✔True
complete solutions rated A+
On a two-wheel drive TLB, about how much of the machine's weight is in the backhoe
assembly? - ANS ✔1/3
What causes the weight of the backhoe attachment to transfer the machine's center of gravity
upward as well as to the rear when compared to other machines? - ANS ✔Its location, high
above the ground and far behind the wheelbase
Why should the operator alter the TLB's dimensions? - ANS ✔To improve stability
To improve safety
To improve maneuverability
A 32% slope will rise how many feet vertical in 100ft horizontal? - ANS ✔32 Feet
On a two wheel drive machine. why is it important to keep as much weight and traction as
possible on the rear wheels? - ANS ✔The brakes are only on the rear wheels.
If you must drive up or back down a grade with the hoe on the downward end, you should: -
ANS ✔Stabilize the front wheels by filling the loader bucket with dirt or heavy material.
Raising the loader bucket will: - ANS ✔Shorten the machine
Shift the weight up and to the rear
Decrease the TLB's Stability
,Features such as 4 wheel-drive, and large front tires tend to destabilize the TLB. - ANS ✔False -
the weight of the drive assembly will shift the weight forward slightly, and make the machine
more stable.
A machine with a hydraulic breaker attached to the backhoe will have _________ weight on the
front tires? - ANS ✔Less
A 3/4:1 slope is commonly used in stable soils for sloping temporary excavations, when
specified by the engineers. - ANS ✔True
Operating a TLB (or any kind of heavy equipment) is a construction trade that is unique in the
construction industry: - ANS ✔Because of the high weight involved.
The universal forces and principles are: - ANS ✔Constant &
Variable
A simple slope that rises 1 ft vertical for every 10 ft horizontal is expressed as: - ANS ✔10%
The great weight of the TLB dictates that the other forces and principles acting on the machine
will be minimal. - ANS ✔False - The great weight of the TLB dictates that the other forces and
principles acting on the machine will also be of great magnitude.
When weight and motion are combined the result is: - ANS ✔Momentum
When momentum and downhill forces are combined they can become stronger than the forces
that are keeping the machine under control. - ANS ✔True
Which of the following are true of a 2:1 slope? - ANS ✔Commonly used slope for stability
between building pads.
,Loader backhoes are almost never used on a slope this steep.
A 2:1 slope is a 1 ft rise for every 2 ft horizontal.
Downhill force is the combination of weight and momentum. - ANS ✔False - Downhill force is
the result of the combination of weight and pitch of slope.
When on a downhill, a bicycle rider will be propelled by the center of gravity. - ANS ✔True
When operating a TLB a loss of traction will result in: - ANS ✔Reduced productivity
Loss of control
Loss of safety
Friction usually occurs between the bucket (or cutting edge) and the ground. - ANS ✔True
Raising the loader bucket or extending the back hoe will move the center of gravity to the rear
of the machine. - ANS ✔True
The power of strength of downhill force by the weight of the object and the slope it is resting
on. - ANS ✔True
A 1:1 slope is commonly used in temporary excavations as per OSHA regulations. - ANS ✔True
There is _______ universal forces and principles that determine the safe operation of a TLB. -
ANS ✔8
On flat level ground, downhill force is an important consideration for the operator to consider
when planning the job. - ANS ✔False - On flat level ground downhill force is not a factor
because there is no slope present.
, A 100% slope = ________ degrees - ANS ✔45
A 1% slope is commonly used for drainage on paved surfaces such as parking lots. - ANS ✔True
A 50% slope is equal to 1:1 slope. - ANS ✔False - A 50% slope is equal to a 2:1 slope
A 2% slope is commonly required for sheet flow drainage such as grading around houses to
ensure positive drainage. - ANS ✔True
On a 20% slope, how much vertical rise would there be when the horizontal measurement was
100 feet. - ANS ✔20 feet
The center of gravity of an object is determined by: - ANS ✔The weight of the object.
The shape of the object.
How the weight is distributed.
When using the loader, the base of the machine is the entire area inside of where the tires
contact the ground. - ANS ✔True
The vertical line indicates the force of gravity and where the COG is in relation to the base. - ANS
✔True
The high weights involved in operating heavy equipment: - ANS ✔Bring with them the
unbending laws of physics.
One common element that should be present in every TLB operation is smoothness. - ANS
✔True
