EXAM 3
問題一覧
1
The method of mining for surface Highwall or out recovery of coal by boring or excavation openings
Auger mining
2
The amount of oxygen in underground mines required under the revised mind safety rules and regulation is
20% by volume
3
In planning and development, what is the main factor for determining the bench height and an open pit?
Equipment specification
4
Occurs when an obstruction to the flow is encountered, and the velocity of the medium is great enough
Impingement
5
What is the importance of defining the pit limit?
to determine the amount of mineable ore
6
It is the underground mind gas otherwise called as white dump
Carbon monoxide
7
Refers to the timbering or concrete around the mass or top of the shaft
Collar
8
cut and fill stoping, shrinkage stoping VCR stoping And long wall mining our methods that are
Artificially supported
9
How many drivers are required for mining company that operates 10 dump trucks running 24 hours a day in a shift of two shift schedule considering 85% mechanical availability and 10% manpower availability
19
10
The condition of the surrounding rock in in situ Mining
Impermeable
11
Underground mining method used to extract mineral deposits that are roughly tabular, strong flat or simply dipping and generally in contact with strong wall rock
Unsupported
12
A type of anemometer suitable for measuring very high velocities than special anemometer
Pitot tube apparatus
13
All unit operations involve in extracting or excavating or moving bulk materials or minerals during mining
Materials handling
14
Mine gas produce as a result of poor blasting
Nitrous oxide
15
An overhand mining in which the ore is mine in horizontal slices and remains in the slope as a temporary support for the walls and to provide a working platform
Shrinkage stoping
16
The concept of replacing the intermittent operations of rock, breakage, and material handling in mining with system of continuous extraction
Rapid excavation
17
The underwater excavation deposit usually carry out the floating vessel, which may and corporate processing and was posting facilities
None of these
18
Open excavation from which ore is removed from by gravity through a race or connecting to underground, haulageways
Glory hole
19
The mixture of gases which remains in a mind after a mind, fire or an explosion of fire, dump or cool dust
After Dump
20
During the first shift for 24 hour operation with a two shifting schedule a deal machine was in operation for 10.5 hours and under what you prepared for 3.5 hours within this timeframe, the drill machine achieve the production of 251 m calculate the percentage utilization of the drill machine during the first shift
88%
21
The practice of removing the gas contained in the coal seam and adjoining strata through wellbores, drill holes, and pipeline
Methane drainage
22
the process wherein large quantities of hot water are introduced to wells drilled into buried deposit of native sulfur
Frasch process
23
A method of caving that utilizes the weight of an ore column that is being given to crash itself into sizes, small enough to pass through drop points that have been prepared beforehand
Block caving
24
It is a vertical or horizontal opening to the surface where air enters and circulate inside the mine with the aid of different fans
Intake
25
In borehole extraction or aqueous extraction rock should be
Competent and impermeable
26
produces pressure by importing a Tangential acceleration to air as it proceeds to the impeller
Axial flow fan
27
A surface mining method where the overburden is stripped first and dumped at the same time then the body is mine horizontally in a single bench
Strip mining
28
It is timbered stope but classified as a self-supporting opening because the timbers are not used as support, but to provide working platforms for miners the method is applicable to very narrow veins so that the timber to be used or normally 5 to 6 feet
Stull stope
29
It is called the back ‘pressure results’ from the inside of the vent tube or drift not being perfectly smooth. The air cannot move along the tube or drift as fast as the fan would like to blow more air into the airway does producing friction.
Static head
30
It is a type of ventilation which is efficient and generally dependable
Mechanical ventilation
31
The most expensive among the placer mining methods
Dredging
32
A term applied the carbon monoxide or atmosphere containing lethal quantities of carbon monoxide
White damp
33
The threshold limits value of hydrogen sulfide as per Revised mine, safety rules, and regulation
0.10% by volume
34
An effective way to operate a mine with conventional haulage methods in an inclined seam or bed is to drive all openings cross pitch that is
At an angle to the strike of the deposit
35
It is the underground mine gas otherwise called a marsh gas
Methane
36
A surface or near surface deposit usually tabular, and maybe of considered durable aerial extend containing a mineral particles in detritus
Detrital deposit
37
It is the underground mine gas otherwise called choke or black damp
Carbon dioxide
38
The total area around an airway is called
Rubbing surface
39
Underground mining method used by small scale miners
Gophering
40
The unexcavated face of exposed over burden and coal or an ore In an open cast mining or the face or bank on the uphill side of a contour strip mine excavation
High wall
41
According to the fan law twice the volume develops, how many times the pressure
Four times the pressure
42
Methane is explosive with this range of concentration
5% to 15% by volume
43
The oldest method of my name, both coal And most metallic ores
Room and Pillar
44
Basically, a continuous large volume digging machine attached to gravity concentrating facility with waste removal systems contained on floating platform
Dredge
45
Prolonged exposure of miners to coal dust causes
Anthracosis
46
During the First shift of 24 hour operation with a two shifting schedule a drill machine was an operation for 10.5 hours and underwent repairs for 0.5 hours within this timeframe, the drill machine achieved a production of 251 m calculate the percentage utilization of the drill machine during the first chef
88%
47
In the layering of gases after an underground explosion, which of these gases slice on top
Methane
48
it is the underground mine gas otherwise called as “ laughing gas”
Nitrogen dioxide
49
Hydrogen gas is exclusive with this range of concentration
4% to 74% by volume
50
The most predominant method of mining worldwide
Open pit mining
51
In a mind with 2000 employees where 100 were on sickleave and another were on vacation leave for a particular month. There were 18 last time accident assuming the employees worked for 25 days and no one worked overtime. What was the accident Frequency per million hours
50
52
The Costliest method in underground mining
Square set stoping
53
Any source of potential damage harm or adverse Health effects on something or someone
Hazard
54
Used to measure moderate velocity airflow
Vane anemometer
55
The losses and energy due to the roughness of the wall
Frictional pressure losses
56
Sublevel block caving is a hybrid between sublevel caving and block caving introduced to counter
Problems in block, caving regarding stability reinforcement and secondary blasting problems
57
A system of Transporting ore Consisting essentially of head frame head, winding machine, and winding ropes
Hoisting
58
In class be mine, the safety engineer required should be
One full-time
59
The threshold limits Value of carbon dioxide as per revised mines safety rules, and regulation
0.50% by volume
60
Pressure exerted By the air on the walls of the containing vessel
Static pressure
61
The unsupported and underground mining methods can be used in any type except in
Placer deposits
62
tailings and slurries Maybe ask backfill in a subsidence area
False
63
A product of mine explosion and is given off by gasoline motors during the donation of negating, oxygen balance explosives
Carbon monoxide
64
The percentage of Time the equipment is available to perform its intended function over a defined period of time when it is required by operation
Mechanical availability
65
Investigation reports discussing this severity of an accident in case of fatal or serious accident shall be made
Within 15 calendar days from the date of accident
66
Mine gas that supports combustion
Oxygen
67
An excavator loads dump trucks in a mining operation. The excavator has a cycle time of two minutes each dump trucks have a capacity of 80 tons and requires eight buckets to fill determine the number of dump trucks that can be loaded per hour, assuming an 80% utilization rate.
Three units
68
The ideal number of members of a miner rescue team should be
Five
69
In the context of mine production optimization, which of the following factors can contribute to increase operational, efficiency, and productivity
Adequate Maintenance and minimized equipment breakdown
70
Validity of all safety, engineer, or safety inspector permits
Three years
71
At what temperature are Celsius and Fahrenheit equal
-40 Fahrenheit and -40°C
72
The faster, the air moves the lower pressure
Bernoulli’s principal
73
Sublevel keeping method requires to be called so due to the fact that
The country rock are hanging wall and football caves
74
A large scale or bulk mining method that is highly productive low in cost and use primarily on massive deposits that must be underground
Block caving
75
The temporary saves, the inspector should renew its temporary license every
Every year
76
Sublevel caving layout depends primarily on the size and shape of the ore body for steeply dipping and narrow ore bodies, the appropriate layout is
Longitude layout
77
It is any division or branch of ventilation circuit
Air split
78
Lung ailment caused by for belonged exposure to tin dust
Stanosis
79
During the first shift of a 24 hour operation with a two shifting schedule a drill machine was an operation for 10.5 hours and under one repairs for 0.5 hours within this timeframe, digital machine achieved a production of 251 m calculate the penetration rate of the drill machine
24 m/h
80
The class A mine underground has at least of number ____ Workers
150
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1
The method of mining for surface Highwall or out recovery of coal by boring or excavation openings
Auger mining
2
The amount of oxygen in underground mines required under the revised mind safety rules and regulation is
20% by volume
3
In planning and development, what is the main factor for determining the bench height and an open pit?
Equipment specification
4
Occurs when an obstruction to the flow is encountered, and the velocity of the medium is great enough
Impingement
5
What is the importance of defining the pit limit?
to determine the amount of mineable ore
6
It is the underground mind gas otherwise called as white dump
Carbon monoxide
7
Refers to the timbering or concrete around the mass or top of the shaft
Collar
8
cut and fill stoping, shrinkage stoping VCR stoping And long wall mining our methods that are
Artificially supported
9
How many drivers are required for mining company that operates 10 dump trucks running 24 hours a day in a shift of two shift schedule considering 85% mechanical availability and 10% manpower availability
19
10
The condition of the surrounding rock in in situ Mining
Impermeable
11
Underground mining method used to extract mineral deposits that are roughly tabular, strong flat or simply dipping and generally in contact with strong wall rock
Unsupported
12
A type of anemometer suitable for measuring very high velocities than special anemometer
Pitot tube apparatus
13
All unit operations involve in extracting or excavating or moving bulk materials or minerals during mining
Materials handling
14
Mine gas produce as a result of poor blasting
Nitrous oxide
15
An overhand mining in which the ore is mine in horizontal slices and remains in the slope as a temporary support for the walls and to provide a working platform
Shrinkage stoping
16
The concept of replacing the intermittent operations of rock, breakage, and material handling in mining with system of continuous extraction
Rapid excavation
17
The underwater excavation deposit usually carry out the floating vessel, which may and corporate processing and was posting facilities
None of these
18
Open excavation from which ore is removed from by gravity through a race or connecting to underground, haulageways
Glory hole
19
The mixture of gases which remains in a mind after a mind, fire or an explosion of fire, dump or cool dust
After Dump
20
During the first shift for 24 hour operation with a two shifting schedule a deal machine was in operation for 10.5 hours and under what you prepared for 3.5 hours within this timeframe, the drill machine achieve the production of 251 m calculate the percentage utilization of the drill machine during the first shift
88%
21
The practice of removing the gas contained in the coal seam and adjoining strata through wellbores, drill holes, and pipeline
Methane drainage
22
the process wherein large quantities of hot water are introduced to wells drilled into buried deposit of native sulfur
Frasch process
23
A method of caving that utilizes the weight of an ore column that is being given to crash itself into sizes, small enough to pass through drop points that have been prepared beforehand
Block caving
24
It is a vertical or horizontal opening to the surface where air enters and circulate inside the mine with the aid of different fans
Intake
25
In borehole extraction or aqueous extraction rock should be
Competent and impermeable
26
produces pressure by importing a Tangential acceleration to air as it proceeds to the impeller
Axial flow fan
27
A surface mining method where the overburden is stripped first and dumped at the same time then the body is mine horizontally in a single bench
Strip mining
28
It is timbered stope but classified as a self-supporting opening because the timbers are not used as support, but to provide working platforms for miners the method is applicable to very narrow veins so that the timber to be used or normally 5 to 6 feet
Stull stope
29
It is called the back ‘pressure results’ from the inside of the vent tube or drift not being perfectly smooth. The air cannot move along the tube or drift as fast as the fan would like to blow more air into the airway does producing friction.
Static head
30
It is a type of ventilation which is efficient and generally dependable
Mechanical ventilation
31
The most expensive among the placer mining methods
Dredging
32
A term applied the carbon monoxide or atmosphere containing lethal quantities of carbon monoxide
White damp
33
The threshold limits value of hydrogen sulfide as per Revised mine, safety rules, and regulation
0.10% by volume
34
An effective way to operate a mine with conventional haulage methods in an inclined seam or bed is to drive all openings cross pitch that is
At an angle to the strike of the deposit
35
It is the underground mine gas otherwise called a marsh gas
Methane
36
A surface or near surface deposit usually tabular, and maybe of considered durable aerial extend containing a mineral particles in detritus
Detrital deposit
37
It is the underground mine gas otherwise called choke or black damp
Carbon dioxide
38
The total area around an airway is called
Rubbing surface
39
Underground mining method used by small scale miners
Gophering
40
The unexcavated face of exposed over burden and coal or an ore In an open cast mining or the face or bank on the uphill side of a contour strip mine excavation
High wall
41
According to the fan law twice the volume develops, how many times the pressure
Four times the pressure
42
Methane is explosive with this range of concentration
5% to 15% by volume
43
The oldest method of my name, both coal And most metallic ores
Room and Pillar
44
Basically, a continuous large volume digging machine attached to gravity concentrating facility with waste removal systems contained on floating platform
Dredge
45
Prolonged exposure of miners to coal dust causes
Anthracosis
46
During the First shift of 24 hour operation with a two shifting schedule a drill machine was an operation for 10.5 hours and underwent repairs for 0.5 hours within this timeframe, the drill machine achieved a production of 251 m calculate the percentage utilization of the drill machine during the first chef
88%
47
In the layering of gases after an underground explosion, which of these gases slice on top
Methane
48
it is the underground mine gas otherwise called as “ laughing gas”
Nitrogen dioxide
49
Hydrogen gas is exclusive with this range of concentration
4% to 74% by volume
50
The most predominant method of mining worldwide
Open pit mining
51
In a mind with 2000 employees where 100 were on sickleave and another were on vacation leave for a particular month. There were 18 last time accident assuming the employees worked for 25 days and no one worked overtime. What was the accident Frequency per million hours
50
52
The Costliest method in underground mining
Square set stoping
53
Any source of potential damage harm or adverse Health effects on something or someone
Hazard
54
Used to measure moderate velocity airflow
Vane anemometer
55
The losses and energy due to the roughness of the wall
Frictional pressure losses
56
Sublevel block caving is a hybrid between sublevel caving and block caving introduced to counter
Problems in block, caving regarding stability reinforcement and secondary blasting problems
57
A system of Transporting ore Consisting essentially of head frame head, winding machine, and winding ropes
Hoisting
58
In class be mine, the safety engineer required should be
One full-time
59
The threshold limits Value of carbon dioxide as per revised mines safety rules, and regulation
0.50% by volume
60
Pressure exerted By the air on the walls of the containing vessel
Static pressure
61
The unsupported and underground mining methods can be used in any type except in
Placer deposits
62
tailings and slurries Maybe ask backfill in a subsidence area
False
63
A product of mine explosion and is given off by gasoline motors during the donation of negating, oxygen balance explosives
Carbon monoxide
64
The percentage of Time the equipment is available to perform its intended function over a defined period of time when it is required by operation
Mechanical availability
65
Investigation reports discussing this severity of an accident in case of fatal or serious accident shall be made
Within 15 calendar days from the date of accident
66
Mine gas that supports combustion
Oxygen
67
An excavator loads dump trucks in a mining operation. The excavator has a cycle time of two minutes each dump trucks have a capacity of 80 tons and requires eight buckets to fill determine the number of dump trucks that can be loaded per hour, assuming an 80% utilization rate.
Three units
68
The ideal number of members of a miner rescue team should be
Five
69
In the context of mine production optimization, which of the following factors can contribute to increase operational, efficiency, and productivity
Adequate Maintenance and minimized equipment breakdown
70
Validity of all safety, engineer, or safety inspector permits
Three years
71
At what temperature are Celsius and Fahrenheit equal
-40 Fahrenheit and -40°C
72
The faster, the air moves the lower pressure
Bernoulli’s principal
73
Sublevel keeping method requires to be called so due to the fact that
The country rock are hanging wall and football caves
74
A large scale or bulk mining method that is highly productive low in cost and use primarily on massive deposits that must be underground
Block caving
75
The temporary saves, the inspector should renew its temporary license every
Every year
76
Sublevel caving layout depends primarily on the size and shape of the ore body for steeply dipping and narrow ore bodies, the appropriate layout is
Longitude layout
77
It is any division or branch of ventilation circuit
Air split
78
Lung ailment caused by for belonged exposure to tin dust
Stanosis
79
During the first shift of a 24 hour operation with a two shifting schedule a drill machine was an operation for 10.5 hours and under one repairs for 0.5 hours within this timeframe, digital machine achieved a production of 251 m calculate the penetration rate of the drill machine
24 m/h
80
The class A mine underground has at least of number ____ Workers
150