SCR-WINNING & WORKING DGMS EXAM -2021
Question Paper _ Key of DGMS SECOND CLASS RESTRICTED UNDER CMR - WINNING AND WORKING
1) In manual opencast
working, while working in alluvium soil, morum, gravel, clay or debris, from
the horizontal, the sides shall be sloped at an angle of safety not
exceeding
A) None of them
B) 60 degrees
C) 45 degrees
D) 30 degrees
E) 75 degrees
2) Which of the following is
treated as base explosive
A) TNT
B) Potassium nitrate
C) none of the options
D) NaCl
E) Gun powder
3) No drilling shall be
commenced in an area where shots have been fired, until a thorough examination
at all places, including remaining butts of old deep holes, for unexploded
charges that a drill may strike has been made by the
A) Shot-firer
B) Overman
C) Sirdar
D) None of them
E) Blasting Officer
4) While blasting in fire
areas in opencast coal mines, hottest holes shall
A) be loaded first
B) shall be filled with
carbonaceous matter
C) be left unloaded
D) be loaded last
E) None of them
5) In an opencast mine, where
any road exists above level of surrounding area, it shall be provided with
strong parapet wall/embankment with a height not less than
A) the diameter of the
largest tyre of the vehicles plying on the road.
B) 3 m
C) None of them
D) 3.5 m
E) 2.5 m
6) We understand milisecond
as
A) 1/103 th part of second
B) 1/106 th part of second
C) 1/102 th part of second
D) 1/105 th part of second
E) 1/1010 th part of second
7) Which is not a PPE?
A) Stemming rod
B) Safety Shoe
C) Helmet
D) Safety Belt
E) Goggle
8) Before introducing any
machinery or new operation in a mine, who enforces Code of Practice?
A) Owner
B) Manager
C) Agent
D) Safety officer
E) None of them
9) Majority of the Indian
coal fields are associated with a river flowing by the side. State the river
associated with singareni coal field.
A) Damodar
B) Wardha
C) Godavari
D) Mahanadi
E) Son
10) The height of a bench in
spoil banks shall not exceed
A) 30 m
B) 45 m
C) 60 m
D) 75 m
E) None of the above
11) Which is not a requirement
in an electrical shot-firing apparatus?
A) The firing circuit is made
and broken automatically
B) It can be operated only by
a removable handle or plug
C) The firing circuit is made
and broken by means of a push-button switch
D) None of them
E) It can be operated only by
a fixed type non-metallic handle or plug
12) Filling up of mined out
area in open-cast mine is known as
A) Trenching
B) Reclamation
C) Salvaging
D) None of these
E) OB removal
13) Most important personal
protective equipment for a dumper operator is .
A) Goggles
B) Seat Belt
C) Apron
D) Ear muffs
E) None of the Options
14) In opencast workings, from
any entrance to a mine, except without permission of the manager, no person
shall light a fire within a distance of
A) 15 m
B) None of them
C) 45 m
D) 30 m
E) 60 m
15) A suitable code of practice
for handling and transportation of explosives in bulk in the mine shall be
framed by the
A) Blasting Officer
B) None of them
C) Manager
D) Agent
E) Owner
16) Minimum illumination
standard for area in opencast mines where drill rigs work is
A) 25V
B) None of them
C) 15V
D) 10V
E) 20V
17) Coal is a formation.
A) Sedimentary
B) Magmatic
C) Metamorphic
D) Volcanic
E) Igneous
18) At what time before firing
of deep-holes is done, the danger zone shall be distinctly demarcated by means
of red flags?
A) at least 30 minutes
B) at least 15 minutes
C) at least 60 minutes
D) None of them
E) at least 90 minutes
19) In opencast workings, who
shall ensure that haulroads are kept maintained?
A) Overman and Sirdar
B) Overman
C) Sirdar
D) Dozer operator
E) Assistant manager only
20) A fault in which the older
rocks are thrust over new one by lateral compression so that the ends of the
broken strata overlap each other is called a
A) step fault
B) reverse fault
C) None of them
D) normal fault
E) trough fault
21) In a contoured map if there
are higher values inside the loop it indicates .
A) Slope
B) None of the Options
C) Ridge
D) Valley
E) Plane
22) Every Plan or Section
prepared or submitted in accordance with the provisions of CMR, 1957 shall
A) Show the True North or
Magnetic Meridian with date
B) Show a Scale of Plan at
least 25 cms long and suitably divided and be prepared with a R.F. of 1200:1
unless otherwise provided
C) Name of the Mine, Owner
& Purpose of the Plan, Show the True North or Magnetic Meridian with date
D) Be corrected and be
updated Quarterly
E) All of these
23) Minimum illumination
requirement at places of crushing, screening, segregation and loading/unloading
of Coal Handling Plants is
A) 30H
B) 40H
C) 25H
D) 35H
E) None of them
24) In steep workings, unless
he is secured by a safety belt or a life line, no person shall work or be
permitted to work at any place having an inclination of
A) 30 degrees or more
B) None of them
C) 65 degrees or more
D) 45 degrees or more
E) 60 degrees or more
25) The spacing between the
holes in the trim row drilled in pre-splitting method to control ground
vibrations ranges from
A) 6-8 times the hole
diameter
B) 12-16 times the hole
diameter
C) None of them
D) 16-20 times the hole
diameter
E) 2-6 times the hole
diameter
26) The maximum number of
detonators issued to a shot-firer during his shift shall not exceed
A) 90
B) 100
C) None of them
D) 50
E) Maximum number of shots
that he is permitted to fire
27) In opencast mines, where
crossing between dumper haulroads and roads for Light Motor Vehicles cannot be
avoided, at what the maximum distance from the crossing speed breakers shall be
provided on approach of Light Motor Vehicles crossings shall be clearly visible
to operators of both light motor vehicles and dumpers for atleast
A) 20 m
B) 25 m
C) None of them
D) 15 m
E) 30 m
28) Before introducing any
machinery or new operation in a mine, who frames Code of Practice?
A) Manager
B) Safety Officer
C) All of them
D) Owner
E) Agent
29) In manual opencast working,
while working in alluvium soil, morum, gravel, clay or debris, the height of
any bench shall not exceed
A) 4.5 m
B) 3.0 m
C) None of them
D) 1.5 m
E) 2.0 m
30) While blasting in fire
areas in opencast coal mines, such holes shall not be charged if the
temperature inside the blast hole exceeds
A) None of them
B) 100 degrees
C) 60 degrees
D) 80 degrees
E) 120 degrees
31) Which one of the following
combinations for excavation and/or loading and for transportation of coal or
overburden in a surface mine is not practicable?
A) Scraper - Dumper
B) Dozer - Front-end-loader -
Dumper
C) None of the Options
D) Front-end-loader - Dumper
E) Shovel - Dumper
32) Fire extinguisher shall be
used for
A) Electrical fire
B) Coal fire
C) Oil fire
D) Belt Conveyor fire
E) Coal fire & belt
conveyor fire
33) Plan showing danger of mine
from water is called
A) Underground plan
B) Hydrological plan
C) Gelogical plan
D) Water danger plan
E) Subsidence plan
34) Method of mining is
dependent on
A) gas content of the seam
B) Thickness of the seam
C) depth of the seam
D) All of these
E) gradient of the seam
35) Fly rock can be controlled
most appropriately by .
A) inclination
B) Sub-grade drilling
C) spacing
D) stemming
E) burden
36) Which fault is uncommon in
coalfields
A) step fault
B) trough fault
C) None of them
D) reverse fault
E) normal fault
37) In opencast workings, who
shall ensure that dust control measures are implemented?
A) Sirdar
B) Safety Officer
C) Assistant Manager
D) Overman
E) All of them
38) Dangerous occurrence
includes
A) any accident due to
explosives
B) Fall from height of any
excavation, loading or transport machinery
C) failure of dump or slide
in opencast working
D) bursting of equipment
under pressure
E) All of these
39) A competent person shall
examine all the equipment, material and arrangements provided for fire-fighting
once at least in
A) fourteen days
B) None of them
C) six months
D) one month
E) seven days
40) Considering the current
status, based on the monthly illumination survey, the Illumination Plan in
opencast mines shall be brought up to date in
A) every six months
B) every month
C) every week
D) every three months
E) None of them
41) In opencast workings, who
shall ensue that adequate precautions as laid down in the Coal Mine
Regulations, 2017 are taken before blasting operations are conducted?
A) Blasting Officer
B) Sirdar
C) Shotfirer
D) Overman
E) all of them
42) Dry/slippery road switch,
manual service brake, parking brake, dynamic retarders are safety devices
associated with
A) Dozer
B) Motor Graders
C) None of them
D) Pay Loaders
E) Dumpers
43) While blasting in fire
areas in an opencast coal mine, the depth of holes in the last overburden bench
shall be such as to leave atleast thick
overburden above the coal seam.
A) 5 m
B) 6 m
C) None of them
D) 10 m
E) 12 m
44) A fault whose general
direction or trend is parallel to the strike of the strata is called a
A) None of them
B) strike fault
C) trough fault
D) traverse fault
E) step fault
45) In cast blasting, the
optimimum stemming length is
A) 3 times the burden
B) 2 times the burden
C) half of the burden
D) None of them
E) 0.7-1.3 times of burden
46) In an opencast mine, where
any road exists above level of surrounding area, it shall be provided with
strong parapet wall/embankment with a width at top not less than
A) 3 m
B) 2.5 m
C) 2 m
D) None of them
E) 1 m
47) The overall slope of a
spoil bank shall not exceed
A) 1 vertical to 2.5
horozantal
B) 1 vertical to 2 horizontal
C) 1 vertical to 1.5
horozontal
D) 1 vertical to 1 horizontal
E) None of them
48) Cutter unit, push beams,
web-pillars etc. are associated with
A) Road Grader
B) None of them
C) Dragline operations
D) Surface Miner
E) Highwall Mining System
49) The operator and persons
near to the HEMM shall not be exposed to noise level that exceeds an eight hour
equivalent continuous sound pressure level of
A) 85 dB(A)
B) 100 dB(A)
C) 90 dB(A)
D) None of them
E) 110 dB(A)
50) Minimum ilumination
requirement forWorkshop in opencast coal mines is
A) None of them
B) 70H,40V
C) 60H,50V
D) 50H,100V
E) 100H,50V
51) Permissible Peak Particle
Velocity (ppv) at the foundation level of Objects of historical importance not
belonging to the mine owner with Dominant Excitation Frequency of more than 25
Hz is
A) 20 mm/s
B) 10 mm/s
C) 12 mm/s
D) 16 mm/s
E) None of them
52) Which of them is not
technique of Controlled Blasting?
A) Pre-splitting
B) Line Drilling
C) Deck Charging
D) Side Casting
E) Air Decking
53) The minimum intensity of
Audio Visual Alarm provided with HEMM in open cast mines measured at a distance
of 300 m distance is
A) 200 Lux
B) 250 Lux
C) 100 Lux
D) None of them
E) 300 Lux
54) Where overhead lines cross
a haulroad, clearance of lowest conductors above the raised body of biggest
sized dumper shall not be less than
A) None of them
B) 5 m
C) 3 m
D) 6 m
E) 2.4 m
55) In opencast mines, to use
two types of explosives in any shot-hole, it is required
A) to frame standing orders
for safe use of explosives by the Manager
B) None of them
C) to perform blasting
operations as recommended by explosive manufacturer
D) to take permission from
the Regional Inspector
E) to perform blasting
operations as recommended scientific study
56) The minimum sound level of
Audio Visual Alarm provided with HEMM in open cast mines measured at a distance
of 1.2 m distance is
A) 100 dB(A)
B) 140 dB(A)
C) None of them
D) 90 dB(A)
E) 110 dB(A)
57) During blasting of
deep-holes in opencast coal mines, at what distance of the shot holes sleeping
with explosives no person shall be allowed to be present?
A) anywhere within 50 m
B) anywhere within 100 m
C) anywhere within 60 m
D) anywhere within 150 m
E) None of them
58) Who shall provide adequate
number of accurate and reliable survey instruments for carrying out of all
survey and levelling work ?
A) Manager
B) Surveyor
C) Owner or agent
D) None of them
E) Nominated owner
59) Which of these is not a
technology for Proximity Warning System for large dumpers?
A) Ultrasonic Sensors
B) RFID Systems
C) GPS Based Systems
D) Audio Visual Alarms
E) Radar System
60) Upto what distance from the
opencast mine boundary no working is permitted as per CMR 2017?
A) 90m
B) 15m
C) 30m
D) 7.5m
E) 60m
61) Semi-Automatic fire
suppression system shall be provided for trucks and dumpers of upto what
capacity?
A) 35 tonne
B) 50 tonne
C) 85 tonne
D) 120 tonne
E) 300 tonne
62) In any opencast coal mine,
if Bw is bench width and Bh is bench height, then always .
A) Bw ≥ Bh
B) Bw < Bh
C) Bw = Bh
D) Bw = 0.5 x Bh
E) Bw doesn't depend on Bh
63) By which of the following
the slope of spoil bank is determined?
A) Fleet Angle
B) None of the options
C) Right angle
D) All of the above options
E) Angle of repose
64) Unless otherwise provided,
mine plans shall be on a scale having representative factor of
A) 2000: 1 or 1000: 1
B) 1200:1
C) None of them
D) 2000:1 only
E) 1000:1 only
65) The effective position of
box cut for a deposit, where ratio of OB : Ore is least should be
A) None of the options
B) At boundary of mineral
deposit
C) At any place
D) At high seam solpe end
E) At the middle of the
boundary
66) Blasting of hot holes in a
surface mine is possible by .
A) Charging and firing to be
completed within 2 hrs
B) All the Options
C) Initiation by nonel
D) Lowering the temperature
below 800 C
E) Using emulsion or slurry
explosives
67) Dust exposure of which of
the following categories of persons shall be determined by personal dust
sampler also?
A) Dozer/Grader operators and
helpers
B) Drillers /Dressers
C) Dumper and Tipper
operators and helpers
D) All of them
E) Overman or other competent
person
68) Every device used for
prevention and suppression of dust produced by any machinery, equipment or
process shall be inspected once in every
A) twenty one days
B) fourteen days
C) seven days
D) ten days
E) None of them
69) Every vehicle used for the
transport of explosives in bulk shall be carefully inspected by a competent
person once in every 24 hours to ensure that
A) lights, brakes and
steering mechanism are in good working order
B) the electric wiring is
well insulated and firmly secured
C) fire extinguishers are
filled and are in place
D) the fuel tank and feed
lines are not leaking
E) All of them
70) Coal includes
A) Peat
B) Anthracite
C) Lignite
D) Bituminous Coal
E) All of these
71) Minimum illumination
requirement along the conveyor in opencast coal mines is
A) None of them
B) 30H
C) 25H
D) 20H
E) 15H
72) Permissible limit of dust
concentration in coal mines is .
A) Not exceeding 5 mg/m3
B) Not exceeding 7.5 mg/m3
C) Not exceeding 10 mg/m3
D) Not exceeding 1 mg/m3
E) Not exceeding 3 mg/m3
73) Current CMR speaks about
height of spoil bank. What is that height in m.
A) 30m
B) 45m
C) 10m
D) 20m
E) 60m
74) Minimum illumination
requirement for rest shelter in opencast coal mines is
A) 25H
B) 30H
C) 40H
D) None of them
E) 35H
75) A fracture in rocks usually
associated with lateral or vertical displacement of fractured beds is called a
A) fold
B) fault
C) None of them
D) roll
E) swilley
76) In Ammonium Nitrate Fuel
Oil, what percentage of oil tends to lower sensitiveness?
A) excess of 15
B) excess of 25
C) none of them
D) excess of 10
E) excess of 12
77) The specific gravity of
which coal is the highest?
A) Anthracite
B) Lignite
C) Bituminous coal
D) Peat
E) None of them
78) Which is not a common type
of slope failure in opencast coal mines?
A) Toppling Failure
B) Palne Failure
C) Transverse Failure
D) Circular Failure
E) Wedge Failure
79) While blasting in fire
areas in opencast coal mines, all persons from the area shall be withdrawn
during charging of the holes if concentration of CO is found to be
A) more than 50 ppm
B) more than 100 ppm
C) None of them
D) more than 60 ppm
E) more than 90 ppm
80) A strike fault is also
called a
A) traverse fault
B) step fault
C) trough fault
D) None of them
E) longitudinal fault
81) Relate the most
distinguishing feature of Jharia coal fields among all Indian coal fields.
A) Thick seams
B) Mutiple seams with varied
thickness
C) Seams with dirt bands
D) Seams with numerous slips
E) Couple of seams with
identical thickness
82) Helpers of shot-firers
shall not use
A) Battery operated watches
B) Leather shoes with leather
soles without hobnails
C) Cotton cloths
D) All of them
E) Conductive type of
footwear
83) Who shall fix the maximum
number of shots that a shot-firer may fire in any one shift?
A) Agent
B) None of them
C) Blasting Officer
D) Manager
E) Safety Officer
84) A fault whose general
direction or trend is parallel to dip of the beds is called
A) None of them
B) traverse fault
C) step fault
D) trough fault
E) normal fault
85) Minimum illumination
requirement in In-pit Crusher/Feeder Breaker in opencast coal mines is
A) 40H
B) 25H
C) 20H
D) None of them
E) 30H
86) To ensure adequacy of
illumination, the manager of every opencast mine shall arrange to conduct
Lighting Survey once at least in
A) every month
B) every year
C) None of them
D) every week
E) every six months
87) Loads in vehicles plying in
opencast coal mines having an overhang in excess of shall be clearly marked by ared flag during the day and red light at
night.
A) None of them
B) 1.2 m
C) 1.0 m
D) 2.0 m
E) 2.5 m
88) Any spoil bank when exceeds
30m height, then what will be the overall slope?
A) 1 vertical to 5 horizontal
B) 1 vertical to 1.5
horizontal
C) 1 vertical to 1 horizontal
D) 1 vertical to 3horizontal
E) 1 vertical to 2 horizontal
89) Minimum illumination
requirement for parking yard in opencast coal mines is
A) 40H
B) 45H
C) None of them
D) 50H
E) 25H
90) Having regard to the task
to be performed, who shall ensure that the shot holes are not over-charged or
under- charged?
A) Assistant Manager
B) Blasting Officer
C) None of them
D) Manager
E) Shot-firer
91) During blasting of
deep-holes in opencast coal mines, the Blasting Officer shall be a holder
of
A) At least a Sirdar's Certificate
B) at least second class
manager's certificate
C) First class manager’s
certificate
D) None of them
E) at least Overman's
Certificate
92) Which of the following
agent is used to give sheath in a permitted sheathed explosive
A) NG
B) TNT
C) NaCl
D) Charcoal
E) NaHCO3
93) In case of a disputed mine
boundary, till the issue is determine by a court of law, from the boundary
claimed by the owner of the adjacent mine, no working shall be made within a
distance of
A) 45 m
B) 7.5 m
C) 15 m
D) 100 m
E) None of them
94) Of the given types of
geoogical discontinuities and disturbances, are
most common in Indian coalfields
A) Igneous Intrsuions
B) Washouts
C) Folds
D) Faults
E) Ball coal
95) In opencast coal mines
Illumination Scheme shall be formulated by the
A) Manager
B) Agent
C) safety officer
D) None of them
E) Owner
96) No smoking, naked lights or
open fires should be permitted at what minimum distance from water proof bags
containing Ammonium Nitrate Fuel Oil?
A) 10 m
B) 25 m
C) 20 m
D) 15 m
E) None of them
97) Minimum illumination
requirement for Transfer points and drive/tail end area of conveyors in
opencast coal mines is
A) None of them
B) 20H
C) 40H
D) 30H
E) 35H
98) In case of opencast
workings, no person shall be appointed as a shot-firer unless he holds
A) a Manager's Certificate
B) Overman's Certificate
C) Shot-firer's Certificate
granted under regulation 12 of the Coal Mines Regulations, 1957
D) All of them
E) Sirdar's Certificate
99) In cast blasting, for the
operation to be economical, the bench height shall not be less than
A) 25 m
B) 15 m
C) None of them
D) 30 m
E) 20 m
100) Within what distance of the
shot holes sleeping with explosives, no person shall be allowed to be present
A) None of them
B) 100 m
C) 50 m
D) 30 m
E) 60
m
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