| Post Name | Mate (Mines) - Kerala Minerals and Metals Ltd |
|---|---|
| Question Paper Code | 006/2024/OL |
| Category Code | 153/2023 |
| Date of Test | 10 January 2024 |
| Exam Type | Online Examination |
| Total Questions | 100 |
1
The drill machine that can drill holes from 65 to 230 mm diameter is hard rocks is
Answer
C. DTH
2
The percussive drilling is applicable up to maximum depth of
Answer
B. 300 m
3
The device used to prevent unnecessary swinging of the bucket in sinking shaft is
Answer
D. Rider
4
The quantity of ventilating air shall be provided in sinking shaft is _________, if depth exceeds 25 m.
Answer
C. 300
5
The method of sinking shaft through alternate loose and tough strata up to 60 m is
Answer
C. Forced drop method
6
For a coal seam of moderate dip, the shaft may be located in the ________ of the property.
Answer
B. Middle
7
In cementation method of sinking shaft, the purpose of treating holes with chemicals like silicate of soda and aluminium sulphate is
Answer
A. To reduce the friction
8
________ is the process of treating holes with chemicals in cementation method.
Answer
B. Silicatisation
9
The composition of charcoal : sulphur : potassium nitrate (%) in Gunpowder is _______
Answer
A. 15 : 10 : 75
10
PETN stands for
Answer
C. Pentaerythritol tetranitrate
11
Which of the following statement is correct with respect to permitted explosives :
Answer
D. P5 - used for delay blasting in solid blasting and in gassy coal seams
12
_______ is a chemical component having three properties. High explosive and oxidising agent and cooling agent.
Answer
D. Ammonium nitrate
13
Detonating fuse consist core of _______
Answer
A. PETN
14
The value of 'spacing' is dependent upon
Answer
B. the burden, hold depth, relative primer locations between adjacent charge columns, and the delay type being used
15
The general observations during too wide spacing :
Answer
B. toe problems between holes
16
Is a technique where a row of parallel holes closely spaced, along the excavation perimeter or final excavation are fired simultaneously prior to the primary blast using decoupled charges or low strength and energy explosives
Answer
D. Pre-splitting
17
The depth of hole is restricted to 50% - 60% of the width of the drift in
Answer
D. Pyramid cut
18
Which of the following statement is correct with respect to transportation of explosives?
Answer
A. 10 T or half the carrying capacity of railway wagon whichever is less
19
Which of the following statement is 'NOT' correct with respect to transportation of explosives?
Answer
C. A vehicle transporting explosives shall be taken into garage or repair shop in emergencies
20
The drill machine used for drilling vertical holes of 150 - 300 mm diameter specially in medium hard rocks is
Answer
A. Churn drill
21
This type of drill machine is used for drilling holes ranging from 60 mm to 150 mm diameter at a shallow depth
Answer
B. Wagon drill
22
The following is not classified under types of surface mining
Answer
C. Adit mining
23
Which of the following statement is correct about advantage of surface mining method over underground mining method?
Answer
A. Higher flexibility of operation
24
Which of the following is independent variable affecting rock penetration during drilling process?
Answer
C. Rock
25
Match the following i. Mechanical attack P. Freezing ii. Thermal Q. Cavitation iii. Fluid R. Hammer
Answer
B. i-R; ii-P; iii-Q
26
The following is not the main functional components of a drilling system
Answer
D. Rock type
27
Cutting sequence of a percussion drill bit
Answer
B. radial cracks-crushed powder-large chips-final outline of crater
28
The wagron drill machine can drill hole of _______ diameter.
Answer
B. 40 - 100 mm
29
The removal of ice wall after completion of sinking by sending hot brine through holes in freezing method of sinking shaft is known as
Answer
D. Thawing
30
The usual gradient for the inclines is
Answer
A. 1 in 4
31
A competent person means he is attained the age of
Answer
C. 20 years
32
Mines act comes into force on
Answer
D. 15th March 1952
33
Application for an examination conducted by the board shall be made to the board not less than ______ prior to the fixed for the examination
Answer
B. 60 days
34
No person shall act, or be appointed, as manager of more than one mine except with the previous permission in writing of the chief inspector and subject to such conditions as he may specify therein. No such permission shall have effect for a period exceeding
Answer
B. 12 months
35
In every mine the average employment of which exceeds ________ in workings below ground, the manager shall be assisted by assistant managers and/or underground managers.
Answer
D. 450
36
No person shall act as a manager or an official or a blaster or a winding engine man in a mine after attaining the age of _______ unless he has obtained, within the preceding one year, a medical certificate of fitness certifying him fit to carry out the duties prescribed for him in the Act and in the regulations :
Answer
B. 60 years
37
No manager shall vacate his office without giving due notice in writing to the owner or agent atleast _______ before the day on which he wishes to vacate his office.
Answer
C. 30 days
38
The limiting gradient for the conveyor with rubber coating without breaking arrangement is
Answer
C. 1 in 5
39
The inclination of the idlers in belt conveyor is
Answer
B. 20 to 30 deg.
40
In formation of benches the angle of slope should not exceed
Answer
C. 45 deg.
41
The height of the coal bench should not exceed
Answer
B. 3 m
42
In alluvial soil, morum gravel, clay, debris or other similar ground the sides shall be kept benched and the height of any bench shall not _______
Answer
B. exceed 1.5 metres
43
The slope of the high wall is usually ________ off the vertical.
Answer
D. 20 deg.
44
It shall be the duty of a competent person to examine carefully, once at least in every ______, every haulage engine, brake-wheel, rope and other appliance in use.
Answer
B. 24 hours
45
No locomotive shall be used where the gradient of the track exceeds ___________.
Answer
A. 1 in 15
46
When 'float' or other similar deposit is worked by manual means on a sloping face, the face shall be benched and the sides shall be sloped at an angle of not _______ degrees from the horizontal.
Answer
C. More than 60
47
Where an excavation which has been formed as a result of any mining operation, extends within a distance of _______ from a public road or any building, substantial fencing shall be erected and maintained around the excavation.
Answer
B. 15 metres
48
Every fence erected on the surface shall, once at least in every _______, be examined by a competent person.
Answer
A. 07 days
49
No tree, loose stone or debris shall unless otherwise permitted in writing by the Chief Inspector be allowed to remain within a distance of _______ from the edge or side of the excavation.
Answer
B. Three metres
50
Gradients of roads in quarries for tyred vehicular traffic should not exceed
Answer
C. 1 in 10
51
"Heavy Earth Moving Machinery (HEMM)" means machinery used in
Answer
A. Opencast mines for loading or transporting minerals or overburden
52
No belt conveyor shall be used in a mine below ground without the permission in writing of the _______ and subject to such conditions as he may specify therein.
Answer
B. Chief Inspector
53
For important haul roads the minimum factor of safety of the slope is
Answer
B. 1.5
54
The machine employed for loading fragmented rock from a bench standing on the floor of the bench is
Answer
B. Dipper shovel
55
The overburden should be so dumped that it does not roll down at the coal benches when it assumes
Answer
B. Its angle of repose
56
As per the metalliferrous mines regulations 1961, for a shaft, upto what minimum depth can it exist without a winding engine
Answer
A. 60 m
57
As per the metalliferrous mines regulations 1961, a shaft or winze in the course of being sunk shall be provided with a ladder way when its angle of inclination (from the horizontal) exceeds
Answer
B. 20 degrees
58
As per The Metalliferrous Mines regulations 1961, Sollars shall be provided for the ladder ways when it
Answer
A. exceeds 20 m in depth and inclination of more than 30 degrees with the horizontal
59
As per The Metalliferrous Mines regulations 1961 The factor of safety (FOS) of a winding rope in a shaft exceeding 1500 m in depth shall be
Answer
D. FOS < 5
60
As per The Metalliferrous Mines Regulations 1961, a dethatching bell or plate in connection with a safety hook shall be checked once in
Answer
C. 30 days
61
As per The Metalliferrous Mines regulations 1961, every haulage engine brake wheel and rope shall be checked once in every
Answer
A. 24 hours
62
As per The Metalliferrous Mines regulations 1961, without is safety belt no person shall be allowed to work in an inclination of more than
Answer
B. 45 degrees
63
As per The Metalliferrous Mines Regulations 1961, upto what time before the commencement of a shift shall a mining mate with his assistants check the working places
Answer
C. 2 hour
64
As per The Metalliferrous Mines regulations 1961, for a competent person to be a blaster the number of persons that are employed under him shall not exceed
Answer
D. 30
65
As per The Metalliferrous Mines regulations 1961, the clearance to be given by a drill in a hole in comparison with the diameter of a explosive cartridge is
Answer
B. 0.3 cm
66
Two or three compartment raising is done for
Answer
A. Steep or vertical raises
67
Alimak raise climber can be used only when the raise is driven at an angle (with the horizontal) of
Answer
C. more than 40 degrees
68
The support system used in open stoping is
Answer
B. scattered timbering
69
In overhand stoping the purpose of the sill pillar is to protect the
Answer
C. lower haulage level
70
For a steeply dipping thick ore body with a stable hanging and footwall the method of mining can be
Answer
C. Sublevel stoping
71
A stoping system where selective mining can be practiced is
Answer
D. Cut and fill
72
Resuing is a method of stoping for
Answer
A. narrow veins
73
A near horizontal access to a mineral deposit is called an
Answer
B. Adit
74
A place at the bottom of the stope where the ore can be unloaded by gravity is called a
Answer
D. Draw point
75
A minor connection between two levels driven in the downward direction in a metal mine is called
Answer
A. winze
76
Cracks in rock and water percolation from roof are indicated by
Answer
A. visual methods
77
The type of sound given by a good roof is
Answer
B. ringing
78
As per The Matalliferrous Mines regulations 1961 a competent person need to examine the outlets and shafts once in every
Answer
B. 7 days
79
As per The Metalliferrous Mines regulations 1961, a shaft or winze in which water seeps out shall be provided with
Answer
C. water garlands
80
The immediate roof of a roadway or working place in a coal seam consists of
Answer
D. Shale/Sandstone/Coal
81
A reliable roof in coal mining giving warnings before failures can be
Answer
B. Sandstone
82
An unreliable roof that can be treacherous is
Answer
A. Shale
83
The approved method of removing a prop is by
Answer
C. using a prop withdrawer
84
A prop that is said to be under set
Answer
A. when set between the coal seam and its vertical line
85
A support which is a crisscross arrangement of wooden sleepers is called as
Answer
D. Chock/cog/chock mate
86
Hydraulic props are specified by
Answer
C. yield load
87
The oil pressured in a hydraulic prop can be set by
Answer
C. open circuit system/closed circuit system
88
Prop density is
Answer
A. number of props required to support a square meter of roof
89
Self advancing/walking supports are
Answer
A. open circuit hydraulic props
90
A hydraulic prop is superior to the friction prop on the account of
Answer
C. high and uniform loads
91
A steel prop has the following advantage compared to a wooden prop
Answer
D. greater strength/reuse and recovery/incombustible
92
Erecting of supports as per a pattern laid down by the directorate general of mines safety is
Answer
A. systematic timbering
93
For a brick wall used as a support in a coal mine the foundation concrete should have a height of
Answer
C. 150 mm
94
A toxic non explosive gas in an underground mine is
Answer
D. carbon dioxide
95
As per coal mine regulations 1957, underground mine air should contain at least
Answer
B. 19% of
96
The M.S.A. Methanometer is designed on the principle of
Answer
C. Wheatstone bridge
97
Pressure loss in a mine roadway is proportional to
Answer
B. Square of quantity
98
For airways in series the total resistance is given by
Answer
A. R₁+R₂+R₃+…+Rₙ
99
A parallel split of the same cross section helps in
Answer
D. Doubling the quantity
100
A door is made to close by itself
Answer
A. By installing it 10° to the vertical
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