APPSC Mining Engineering 15 March 2020 Question Paper with Answers Key


APPSC Mining Engineering 15 March 2020 Question paper with Answers Key- APPSC conducted Lecturers in Government Polytechnic Colleges (Engineering and Non-Engineering) in A.P Technical Education Service exam on 15 March 2020 FN from 10.00 AM to 12.30 PM. Here we are providing some of the questions asked in APPSC Mining Engineering Paper.

The rate of increase of temperature with the depth inside of a mine is termed as?

Geothermal gradient

The firedamp is largely constituted with?


A mineral soil contains?

Minerals, organic matters, water and air

The term ground water refers to the?

Aquifer location

The value of COD is related to the value of BOD as?


The mines act came into force on?

15th march 1952

Among the persons, who is not an official but a competent person?

Shotfirer or blaster

Which apparatus is called as intrinsically safe?

That inherently incapable of creating spark of sufficient intensity to ignite firedamp

The sound Pressure level is measured as 5 x 10 -4 N/m². What is the noise level?

27.9 Db

Indicate the percentage of Methane concentration that should not be exceeded in the return of a ventilation district?


APPSC Mining Engineering 15 March 2020 Paper

Cyclone bag filter and scrubber are generally used to control?

Air pollution

The Hoskold formula is used for?

Speculative rate of return

The Sum of the years digit method is normally used for?

Determining the depreciation

The net present value of Rs.400 at the end of 5 years at 10% discount rate is?


Why the outlets from a mine are not provided closer than 13.5 m?

Closer outlets will weaken the shaft pillar causing possibility of lakage

The voltage limit of general lighting in the opencast mines shall not exceed?

250 V

The foam type extinguisher is not permitted to deal with class C fires due to?

The foam is conductor of electricity

Which hazards occur if the roof exposure during depillaring operation becomes more than 90 m²?

Air blast

The indication of fatigue for the persons employed in a mine determined by the?

Fast return of heart towards resting level

Which certificates is considered as valid first – aid certificate for any person working inside of a mine?

Certificate from St.Johns’ Ambulance Association (India)

Mining Engineering

APPSC Mining Engineering 15 March 2020 Questions and answers

Detonating fuse contains?


Emulsion explosive is a mixture of?

Ammonium nitrate, FO, Water, hallow micro- balloons

Which is the most precise delay denote?

Electronic Detonator

In mine economics, the measures of dispersion are?

Range, variance and standard deviation

What size of hole can be drilled by a jack hammer?

33 mm

Blasting off the solid is a combination of?

Drilling wedge cut pattern, blasting by P5 explosive

Which terminology is not related to the shaft sinking process?

Dipper shovel

In mine economics, the term At – Mine – Revenue (AMR) Refers to the?

Net smelter return (NSR) minus the realization cost

Which drilling pattern is related to horizontal or incline development in metal mines?

Burn Cut Pattern

The drill holes drilled in the centre of burn cut pattern for providing free face are called?

Relief holes

APPSC Mining Engineering 15 March 2020 paper with Key

As per DCF analysis, a project report prepared for a mine is acceptable if the?

Discounting rate < IRR

The payback period is defined as the time required?

From the start of the project to the time to recover the total investment

An underground mine is highly preferred when?

Operating cost is least

The size of the panel for depillaring is influenced by?

Incubating period of coal seam

The coal seam with bad roof, having stara control problems, is suitable for?

Long wall mining

In a PERT network, the critical path is the path that has?

The longest time

Quick production can be achieved from?

Advance lomgwall mining method

Which actually determining the periodic weighting length in longwall working?

Physical properties of main roof

The series 1, 1/3, 1/9, 1/27 ……………. Converges to?


A square matrix of order 3 is nonsingular if its rank is?


APPSC Mining Engineering Answers Key 15 March 2020

………. Is correct for a compass?

The graduations are in whole circle bearing system

Safety fuse, detonating fuse, ordinary detonators, delay detonators etc. are classified as?

Class 6 Explosives

What size of detonating fuse is mainly used for initiation of Primer / nonel in drive face?

10gm / m

Why is hydraulic drilling technology preferred over pneumatic drilling technology?

Better Environmental conditions

Which is the correct combination of equipment for excavation of a large size decline?

Jumbo drill, LHD, LPDT

Which factor is responsible for drill hole deviation?

Strucyural geology

How is an astronomical triangle formed?

By joining the pole, Zenith and any star

Express 4 hours 34 minutes 13 seconds in degrees, minutes and seconds?

68 degrees 33 minutes 15 seconds

Which is not part of a typical hydrofac system?


Which is a load or stress monitoring device?

Flat jack

Swellex type rock bolts are?

Friction anchored bolts

APPSC Mining Engineering 12 March 2020 Full Question Paper & Key



Please enter your comment!
Please enter your name here

This site uses Akismet to reduce spam. Learn how your comment data is processed.