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Saturday, 4 June 2011

PREVIOUS YEAR QUESTION PAPERS TRIBOLOGY ( KUK )

PREVIOUS YEAR UNSOLVED QUESTION PAPERS – 1 (KURUKSHETRA UNIVERSITY)
TRIBOLOGY
QUE NO. – 1
(A) EXPLAIN TRIBOLOGICAL SYSTEMS AND THEIR CHARACTERISTIC FEATURES. EXPLAIN ONE SYSTEM IN DETAIL?
(B) WHAT ARE THE CAUSES OF FRICTION? STATE AND EXPLAIN ADHESION THEORY OF FRICTION WITH SUITABLE DIAGRAMS?
QUE NO. – 2
(A) WHAT IS TOPOGRAPHY? EXPLAIN IN DETAIL VARIOUS TRIBO – MODELS FOR ASPERITY CONTACTS?
(B) EXPLAIN IN DETAIL THE WORKING OF CROSS – CYLINDER ARRANGEMENT FOR MEASUREMENT OF FRICTION WITH NEAT SKETCHES?
QUE NO – 3
(A) DISCUSS IN DETAIL THE ABRASIVE WEAR. HOW GTHE ABRASIVE WEAR CAN BE PREVENTED? DISCUSS ABRASIVE WEAR RESISTANT MATERIALS?
(B) WRITE SHORT NOTE ON FOLLOWING:
· FRETTING WEAR
· STICK REGIME
· MECHANISM OF WEAR
· CORROSION WEAR
QUE NO. – 4
(A) EXPLAIN RELATIVE IMPORTANCE OF WEAR. WHAT DO YOU MEAN BY SURFACE FATIGUE WEAR?
(B) WHAT ARE THE QUANTITATIVE LAWS OF WEAR? DERIVE THE WEAR EQUATION?
QUE NO.–5
(A) EXPLAIN HYDRODYNAMIC LUBRICATION WITH THE HELP OF NEAT SKETCHES?
(B) EXPLAIN VARIOUS IMPORTANT PROPERTIES OF LUBRICANT?
QUE NO. – 6
(A) EXPLAIN IN DETAILS THE VARIOUS APPLICATIONS OF SLIDING AND ROLLING CONTACT BEARINGS?
(B) WHAT ARE THE DIFFERENT ADDITIVES USED IN LUBRICATING OILS? FOR WHAT PURPOSE THEY ARE ADDED? EXPLAIN
QUE NO. – 7
(A) EXPLAIN HYDROSTATIC BEARING WITH THE HELPM OF NEAT SKETCHES?
(B) EXPLAIN IN DETAIL THE CIRCULAR STEP THRUST BEARING AND WRITE THE PRESSURE DISTRIBUTION EQUATION?
QUE NO. – 8
(A) WHAT ARE THE GENERAL REQUIREMENTS OF BEARING MATERIALS? WHAT DO YOU MEAN BY POROUS BEARINGS?
(B) EXPLAIN THE WORKING OF GAS BEARINGS WITH THE HELP OF NEAT DIAGRAM?


PREVIOUS YEAR UNSOLVED QUESTION PAPERS – 2 (KURUKSHETRA UNIVERSITY)
TRIBOLOGY
QUE NO. – 1
(A) WHAT ARE THE DIFFERENT TECHNIQUES OF SURFACE EXAMINATION? EXPLAIN IN DETAIL
(B) DISCUSS IN DETAIL VARIOUS TRIBO – MODELS FOR ASPERITY CONTACT. WHAT IS TOPOGRAPHY?
QUE NO. – 2
(A) DISCUSS FIVE LAWS OF ROLLING FRICTION. WHAT ARE THE CAUSES OF THE ROLLING FRICTION? HOW THE ROLLING FRICTION IS MEASURED?
(B) WHAT ARE THE TECHNOLOGICAL PROPERTIES OF SURFACES? DISCUSS IN DETAIL
QUE NO. – 3
(A) GIVE VARIOUS TYPES OF WEAR AND EXPLAIN IN DETAIL
(B) HOW THE WEAR IS MEASURED? GIVE WEAR RESISTANCE MATERIALS
QUE NO. – 4
(A) WHAT ARE THE QUANTITATIVE LAWS OF WEAR? DISCUSS ABRASIVE WEAR IN DETAIL
(B) WHAT ARE THE SOURCES AND CAUSES OF WEAR AND EFFECT OF WEAR ON PROPERTIES OF METALS ?
QUE NO. – 5
(A) WHAT IS BOUNDARY LUBRICATION? EXPLAIN WITH THE HELP OF SKETCHES IN DETAILS.
(B) WHAT IS THE FUNCTION OF LUBRICANTS? DISCUSS VARIOUS TYPES OF LUBRICANTS.
QUE NO. – 6
(A) WHAT IS A BEARING? STATE ANY THREE FUNCTION OF BEARING. GIVE APPLICATION OF SLIDING AND ROLLING CONTACT BEARINGS?
(B) WHAT TYPES OF ADDITIVES ARE USED IN LUBRICATING OILS AND WHY? WHAT IS THE EFECT OF LUBRICATION IN I.C. ENGINES?
QUE NO. – 7
(A) DISCUSS AND EXPLAIN THE HYDRO – STATIC BEARING WITH NEAT SKETCHES?
(B) STATE AND PROVE THE PRESSURE EQUATION OF A JOURNAL BEARING?

QUE NO. – 8
(A) SKETCH VARIOUS TYPES OF BALL BEARINGS AND EXPLAIN THEIR FUNCTIONS?
(B) COMPARE SLIDING AND ROLLING CONTACT BEARINGS. STATE ANY FOUR ADVANTAGES AND THREE DISADVANTAGES OF ROLLING CONTACT BEARINGS?


PREVIOUS YEAR UNSOLVED QUESTION PAPERS – 3 (KURUKSHETRA UNIVERSITY)
TRIBOLOGY
QUE NO. – 1
(A) EXPLAIN TRIBOLOGICAL SYSTEMS AND THEIR CHARACTERISTIC FEATURES. EXPLAIN ONE SYSTEM IN DETAIL??
(B) STATE AND EXPLAIN ALL THE LAWS OF FRICTION AND EXPLAIN THE WORKING OF CROSS-CYLINDER ARRANGEMENT FOR MEASUREMENT OF FRICTION WITH SKETCHES?
QUE NO. – 2
(A) EXPLAIN DIFFERENT TECHNIQUES OF SURFACE EXAMINATION IN DETAIL?
(B) WHAT AREC THE CAUSES OF FRICTION? EXPLAIN ADHESION THEORY?
QUE NO. – 3
(A) DEFINE WEAR. EXPLAIN IN DETAIL ADHESIVE WEAR. HOW DO YOU MEASURE THE WEAR?
(B) EXPLAIN FREETING, CORROSION AND SURFACE FATIGUE WEAR?

QUE NO. – 4
(A) WHAT ARE THE QUANTITATIVE LAWS OF WEAR? DERIVE THE WEAR EQUATION?
(B) WHAT IS MECHANISM OF WEAR? WHICH TYPE OF WEAR FINDS APPLICATION IN INDUSTRY



QUE NO. – 5
(A) EXPLAIN ELASTO-HYDRODYNAMIC LUBRICATION?
(B) WITH THE HELP OF SKETCHES, EXPLAIN ROLLING CONTACT BEARINGS?
QUE NO. – 6
(A) EXPLAIN HYDRO-DYNAMIC LUBRICATION WITH THE HELP OF DIAGRAM?
(B) GIVE IMPORTANT PROPERTIES OF LUBRICANTS?
QUE NO. – 7
(A) WITH THE HELP OF NEAT SKETCHE EXPLAIN HYDROSTATIC BEARING?
(B) WHAT ARE THE IMPORTANT PROPERTIES OF BEARING MATERIALS? DISCUSS IN DETAIL?
QUE NO. – 8
(A) EXPLAIN THRUST BEARING WITH A SKETCH. WHAT ARE THE POROUS BEARINGS?
(B) EXPLAIN THE WORKING OF GAS BEARINGS WITH THE HELP OF DIAGRAMS?

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