Mn:mining Engineering Worksheet - 2013 Page 4
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152013
MINING ENGG. –MN
Q. 1 – Q. 25 carry one mark each.
Q.1
In the Coward flammability diagram, the respective percentages of methane and oxygen at the
nose limit are
(A) 14.2, 0.0
(B) 14.1, 18.2
(C) 5.8, 12.1
(D) 5.0, 19.2
Q.2
If the transpose of a matrix is equal to its inverse, then the matrix is
(A) symmetric
(B) orthogonal
(C) skew symmetric
(D) singular
Q.3
In the Moh’s scale of hardness, the minerals in increasing sequence of hardness are
(A) calcite, gypsum, topaz, diamond
(B) topaz, gypsum, calcite, diamond
(C) calcite, gypsum, diamond, topaz
(D) gypsum, calcite, topaz, diamond
Q.4
A ball of weight W is supported on smooth walls as shown in the following figure. R
and R
are
1
2
reactions from the walls 1 and 2. The free body diagram of the ball is represented by
1
2
(A)
(B)
(C)
(D)
R
R
R
1
1
2
R
2
R
R
R
R
1
2
1
2
W
W
W
W
Q.5
For a 25 mm diameter spherical charge, the maximum allowable charge length in cm is
(A) 15.0
(B) 25.0
(C) 30.0
(D) 150.0
Q.6
Long-hole drilling with crater blasting is used for the construction of
(A) winze
(B) shaft
(C) raise
(D) decline
Q.7
Rill stoping method is a form of
(A) block caving
(B) artificially supported stoping
(C) underhand stoping
(D) overhand stoping
Q.8
Transit theodolite is a
(A) micro-optic theodolite
(B) theodolite with face left and face right reading facilities
(C) theodolite with stadia hairs
(D) theodolite with two vertical circles
MN
4/15
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