Mining Engineering
2018 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE MN 2018 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 46–48 of 65. Imported answers require review unless explicitly marked reviewed.
Question 36
Open questionMNNAT2 marksNeeds review
A person standing 50 m away from an HEM experiences 90 dB sound pressure level. If the person moves to a new location that is 70 m away from the HEM, the sound pressure level experienced by the person, in dB, becomes ____________________.
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A portion of a ventilation system has two splits as shown. Split ‘A’ has a resistance of
and a regulator of size 2.0
. The resistance of split ‘B’ in
is _________.
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Open questionMNNAT2 marksNeeds review
Air enters a bord and pillar panel at 10 ppm CO and 20.78% O
. The air at the panel return has 80 ppm CO and 20.52% O
. The ‘Graham’s ratio’ for the status of fire in the panel in % is ____________________.Log in to check the answer
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