HAL PREVIOUS EXAM PAPER for Mechanical

Published by Roma Rahul Gupta for Chhattisgarh Online
HAL PREVIOUS EXAM PAPER for Mechanical check here:

This previous paper is totally based on candiadate's experience.

The test consists of 160 qs. Duration is 150 min .         
First section 20 qs related to General awareness and English         
Second section 20 Qs related to mental ability and Quantitative ability.         
Third section 120 Qs purely related to your Technical subjects .

•  what is the unit of MI on mass basis… kg/m2 
•   chromium increases … wear resistance & ductility + toughness
•   carbide tool bit fixed on tool by ….. brazing
•     when shaft subjected to toque and bending..then eqvl. … . twisting moment is   v(M2 + T2
•     In axial flow compressor surge tank use for….smooth flow.
•     No of active turn reqd for plane  end square wire helical spring….  I think Ans is N+1
•     Flux use during brazing is for … remove oxide on surfaces to be joint
•     Ring present at head of cylinder is called …compression ring
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•     Unit of power in si … watt
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•     Zink and tin is contain of…. Bronze
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•     Galvanizing use…. Zink for coating
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•     One problem on poissions ratio
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•     One prob on Moment of inertia
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•     One problem on prod technology
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•     I grinding wheel binding agent is……  crystallized silicate carbide
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•     Hardest material is….. boron carbide( after diamond)
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•     When eff of 4 stroke diesel engine increased from 5 to 7 % then power consume increases by…. 14
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•     for large production which type of  layout used…. Line layout…
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•      Which type of quality has more imp…… quality of conformance..
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•     In 4 bar mechanism how many fixed and  moving ICR present….. 4 fixed 2 moving
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•     Shaper machine use …. With worth quick return mechanism
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•     One problem on band brake
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•     In diesel engine combustion take place… heterogynous manner
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•     Four to five question on ….PRODUCTION MANEGMENT.. like layout  ..product quality…
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•     High pressure and liquid refrigerants present in vapors compressor at…. Before expansion valve.
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•     At neutral axis ..which stress is ZERO….. ..
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•     During electric arc welding what happs….Direct metal to metal contact with electrode cont
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•     One steam enters in condenser at…..
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•     When adding of water vapor in dry air without changing the DBT process called….. HUMIDIFICATION
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•     When…air and water vapor cooled up to saturation temp then this point indicate……DBT
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•     Some 4 -5 Qs on match the colom … related to rolling pair .. sliding pair..Etc
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•     some Qs on EDM , JDM,,,,,Manufacturing technology…
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•     one qs is on moldings ..about high pouring temp…Defect
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•     max velocity of compound pendulum is given by….vk/3m
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•     Crowning of pulley depend upon…. Dia of pully
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•     Lines of enthalpy indicated on molar dia… by vertical lines
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•     When extreamly small expantion fo gas at const enthropy process is called….. throttling
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•     one qs is on requrment of pressure ratio for given procees …ans is …p2=….vp1p3

HAL written test in the month of May 2008 taking Bangalore as a centre. My test was of 2.5 Hrs, total 156 questions were there. Most of the questions were from Technical (Mechanical). Other questions were from General knowledge, Quantitative aptitude & General English.
Now I don't remember all  the exact questions even though I am trying my best.
1)  General Knowledge
1)  Who built the Konark temple?
2)  Who won the Football world cup?
3)  Which was the venue for 14th SAARC summit?
4)  Which is the capital of North Korea?
5)  Which is the venue for next Football World cup?
Total 10 questions were there in this section.


2) General English.
The questions in this section were easy. Just u have to select the right word. If u prepare well from any of the books, this section is very easy.


3) Quantitative Aptitude
The questions in this section were from ratio and proportion, simple interest, age etc. Total 10 questions were there in this section.


4)  Technical (Mechanical)
Almost over 100 questions were there from this section.
1)  The unit of surface tension?  N/m option was not there.
2)  Nichrome is an alloy of?
3)  Why desert coolers are not used in winter season?
4)  The principle of Brinell Hardness testing?
5)  The gear used for Non Parallel, non intersecting shafts?
6)  Which process is widely used for the manufacture of gears?
Some of the questions were from thermodynamics, Mechanics of materials, Theory of machines and  Manufacturing Technology.

HAL PREVIOUS EXAM PAPER for Mechanical