MINING MACHINERY QUIZ 1 ( 1- 11) Questions....! |
MINING ENGINEERING
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1)
The maximum speed of the LHD when loaded is?
1) 3 to 5 kmph
2) 5 to 8 kmph
3) 8 to 10 kmph
4) 10 to 12 kmph
2)
The motor capacity of the shearer now a days?
1) 500 kw
2) 375 kw
3) 1500 kw
4) 1000 kw
3)
The maximum thickness of the seam that the shearer can work now a days is?
1) 3 m
2) 4 m
3) 5 m
4) 7 m
4)
The limiting gradient for the shearer is?
1) 15 deg
2) 25 deg
3) 35 deg
4) 40 deg
5)
In permanent cable used to supply the electric power run through the shaft or incline the moisture of atmosphere is excluded by?
1) Impregnated paper insulation
2) Tarred jute
3) Seamless lead sheath
4) Double armouring
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6)
The permanent cable suspended in vertical shaft should be?
1) Weather proof
2) Non drain
3) Double armouring
4) Fire proof
7)
The conductivity of the armouring of permanent cable serving the purpose of earthing shall have at least........that power core?
1) 10 %
2) 20 %
3) 30 %
4) 50 %
8)
While the face is advanced the cable supplies the power from gate end box to coal drill is extended through joint box of?
1) Straight through type
2) Inset type
3) flit pin plug type
4) cone type
9)
In gate end box the leakage protection should work where is a leakage os?
1) 1 %
2) 5 %
3) 10 %
4) 20 %
10)
The most common type of flame proof protection is?
1) Hermetically sealed protection
2) Flange protection
3) Hinge protection
4) Open protection
11)
Intrinsically safe circuit or apparatus works on voltage not more than?
1) 30 v
2) 110 v
3) 220 v
4) 60 v
ANSWERS
1) 1
2) 2
3) 3
4) 3
5) 3
6) 2
7) 4
8) 3
9) 2
10) 2
11) 1
THANKING YOU
MINING ENGINEERING
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