Millwright- Conveyors Math With
Complete Solutions 100% 2024
Entire belt runs off at all points of the line - correct answer Belt is strained or elongated excessively on
one side
If belt is new allow time break in, if it is not new or does not break in properly cut out strained section
and splice in new section
The belt looks hard and has excessive cracks what could be the cause? - correct answer Excessive heat,
may need to change to excessive heat belt
You notice separation of top cover what could be the cause? - correct answer Chemical or oil in load,
breaker strip is definitely inadequate or even missing, abrasive material hitting cover or the pulleys are
too small.
The entire belt is improperly spliced or out of square, one section of the belt runs off at all points on the
line. What is the correction? - correct answer Resplice
The belt is running off tail pulley because shaft may not be square with the center line of the conveyor.
How would you correct? - correct answer Realign conveyor structure or head shaft
Worn pully lagging can be replaced
realign idlers ahead of head pully
The tripper teack gauge is too large for the wheels, pulling the tripper out of square with the belt. belt
wears against tripper frame. - correct answer Reduce the tripper track gauge and realign pulleys
If there is insufficent traction between the belt and pulley you could increase the wrap using a snub
pulley, use lagged pulleys, install proper cleaning devices on belts and install centrifugal switch for safety.
If it is in wet conditions would help? - correct answer Use grooved lagging
, The belt slips on start up and you find that the counter weights are to light. How is this problem
corrected? - correct answer Increase counter weight or increase screw take up tension
You find that the counter weights are too heavy and the belt is excessively stretching. What is the correct
action? - correct answer Recalculate the counter weight required or reduce take up tension to the point
of slip, then tighten slowly
The belt is excessively stretching, this may be caused by different rim speeds on tandem pulleys or
permeation of carcass by chemicals, oils or acids. Corrective action? - correct answer Refer to
engineering department and correct, find belt that is designed for specific conditions
The belt breaks at or near the fasteners and they tear loose. The corrective action is to install cleaning
devices and improve maintenance. What was the cause? - correct answer material buildup on pulleys, or
excessing impact on fasteners. The copunterweights could be too heavy or the rim speed on tandems
are at different speeds. there is excessive tension and you may need to use vulcanize splices
Material is falling between belt and pulley causing belt to break near the fasteners and they tear loose.
What can we check to correct? - correct answer First off m,ake sure the skirt is proper and remove
accumulation, the maintenance must be improved and we may need larger diameter pullys if they are
too small. Lastly let make sure we are using the correct fasteners
If there is excessive heat and the fasteners have poor holding ability you may need to? - correct answer
Use vulcanized splices and a belt designed for hot material
Volcanized splice separation what are 5 causes? - correct answer Worn pulley lagging, counter weight is
too heavy, different rim speeds on tandem pulleys, chemical or oil in load, pulleys too small
You see excessive belt top cover wear, but it is confined to the center only. What may be the cause? -
correct answer Too fast of loading or belt speed, reduce belt speed to permit fuller cross section loading
This type of elevator operates at high speed, usually 56-90m/min for the chain and sproket style. This
type is good for cement.
a. positive discharge
b. centrifugal discharge
Complete Solutions 100% 2024
Entire belt runs off at all points of the line - correct answer Belt is strained or elongated excessively on
one side
If belt is new allow time break in, if it is not new or does not break in properly cut out strained section
and splice in new section
The belt looks hard and has excessive cracks what could be the cause? - correct answer Excessive heat,
may need to change to excessive heat belt
You notice separation of top cover what could be the cause? - correct answer Chemical or oil in load,
breaker strip is definitely inadequate or even missing, abrasive material hitting cover or the pulleys are
too small.
The entire belt is improperly spliced or out of square, one section of the belt runs off at all points on the
line. What is the correction? - correct answer Resplice
The belt is running off tail pulley because shaft may not be square with the center line of the conveyor.
How would you correct? - correct answer Realign conveyor structure or head shaft
Worn pully lagging can be replaced
realign idlers ahead of head pully
The tripper teack gauge is too large for the wheels, pulling the tripper out of square with the belt. belt
wears against tripper frame. - correct answer Reduce the tripper track gauge and realign pulleys
If there is insufficent traction between the belt and pulley you could increase the wrap using a snub
pulley, use lagged pulleys, install proper cleaning devices on belts and install centrifugal switch for safety.
If it is in wet conditions would help? - correct answer Use grooved lagging
, The belt slips on start up and you find that the counter weights are to light. How is this problem
corrected? - correct answer Increase counter weight or increase screw take up tension
You find that the counter weights are too heavy and the belt is excessively stretching. What is the correct
action? - correct answer Recalculate the counter weight required or reduce take up tension to the point
of slip, then tighten slowly
The belt is excessively stretching, this may be caused by different rim speeds on tandem pulleys or
permeation of carcass by chemicals, oils or acids. Corrective action? - correct answer Refer to
engineering department and correct, find belt that is designed for specific conditions
The belt breaks at or near the fasteners and they tear loose. The corrective action is to install cleaning
devices and improve maintenance. What was the cause? - correct answer material buildup on pulleys, or
excessing impact on fasteners. The copunterweights could be too heavy or the rim speed on tandems
are at different speeds. there is excessive tension and you may need to use vulcanize splices
Material is falling between belt and pulley causing belt to break near the fasteners and they tear loose.
What can we check to correct? - correct answer First off m,ake sure the skirt is proper and remove
accumulation, the maintenance must be improved and we may need larger diameter pullys if they are
too small. Lastly let make sure we are using the correct fasteners
If there is excessive heat and the fasteners have poor holding ability you may need to? - correct answer
Use vulcanized splices and a belt designed for hot material
Volcanized splice separation what are 5 causes? - correct answer Worn pulley lagging, counter weight is
too heavy, different rim speeds on tandem pulleys, chemical or oil in load, pulleys too small
You see excessive belt top cover wear, but it is confined to the center only. What may be the cause? -
correct answer Too fast of loading or belt speed, reduce belt speed to permit fuller cross section loading
This type of elevator operates at high speed, usually 56-90m/min for the chain and sproket style. This
type is good for cement.
a. positive discharge
b. centrifugal discharge
