PREVIOUS YEAR QUESTION PAPERS MD - 11 ( KUK )

PREVIOUS YEAR UNSOLVED QUESTION PAPERS – 1 (KURUKSHETRA UNIVERSITY)

MACHINE DESIGN - 11

QUE NO. – 1

DESIGN A PAIR OF HELICAL GEARS TO TRANSMIT 30 KW POWER AT A SPEED OF REDUCTION RATIO 4:1. THE INPUT SHAFT ROTATES AT 2000 RPM. TAKE HELICAL ANGLE AND NORMAL PRESSURE ANGEL EQUAL TO 25° & 20° RESPECTIVELY. BOTH PINION & GEARS ARE MADE OF STEEL. THE FOLLOWING DATA IS GIVEN:

PART NAME PERMISSIBLE STRESS BHN

PINION 55 MPA 340

GEAR 40 MPA 300

QUE NO. – 2

DETERMINE THE PROPER PITCH, MODULE, FACE WIDTH NUMBER OF TEETH, OUTSIDE DIAMETER OF A PAIROF 20 INVOLUTE FULL DEPTH SPUR GEARS TO TRANSMIT 112.5 KW, FROM A PINION RUNNING AT 750 RPM TO GEAR RUNNING AT 140 RPM. THE SERVICE IS INTERMITENT WITH LIGHT SHOCKS?

QUE NO – 3

SELECT A SUITABLE CHAIN DRIVE TO TRANSMIT 30 KW FROM AN ELECTRIC MOTOR TO A LINE SHAFT. MOTOR SHAFT DIAMETER IS 60MM, MOTOR RPM = 1200; LINE SHAFT IS 250; AND CENTER DISTANCE IS ADJUSTABLE FROM 600MM. SERVICE IS 10 HR/DAY, 6 DAYS PER WEEK. GOOD LUBRICATION CONDITION IS EXPECTED?

QUE NO. – 4

(A) WHAT ARE THE TWO THEORIES APPLIED TO FRICTION CLUTCH?

(B) A MULTIPLATE CLUTCH, STEEL ON BRONZE IS TO TRANSMIT 4.5 KW AT 750 RPM. THE INNER RADIUS OF THE CONTACT IS 40 MM AND THE OUTER RADIUS OF CONTACT IS 70 MM. THE CLUTCH OPERATES IN OIL WITH AN EXPECTED COEFFICIENT OF FRICTION IS 0.1. THE AVERAGE ALLOWABLE PRESSURE IS 0.35 N/MM². FIND

· THE TOTAL NUMBER OF STEEL AND BRONZE DISC?

· THE ACTUAL AXIAL FORCE REQUIRED?

· THE ACTUAL AVERAGE PRESSURE?

· THE ACTUAL MAXIMUM PRESSURE?

QUE NO.–5

IT IS REQUIRED TO DESIGN A HELICAL COMPRESSION SPRING FOR THE VALVE MECHANISM. THE AXIAL FORCE ACTING ON THE SPRING IS 300N WHEN VALVE IS OPEN AND 150N WHEN THE VALVE IS CLOSED. THE LENGTH OF THE SPRING IS 30 MM WHEN THE VALVE IS OPEN & 35 MM WHEN VALVE IS CLOSED. THE SPRING IS MADE OF OIL HARDENED & TEMPERED VALUE SPRING WIRE AND THE ULTIMATE TENSILE STRENGTH IS 1370N/MM². THE PERMISSIBLE SHEAR STRESS FOR SPRING WIRE SHOULD BE TAKEN AS 30% OF THE ULTIMATE TENSILE STRENGTH. THE MODULUS OF RIGIDITY IS 81370 N/MM²

THE SPRING IS TOBE FITTED OVER A VALVE ROD AND THE MINIMUM OUTSIDE DIAMETER OF THE SPRING SHOULD BE 20 MM. DESIGN THE SPRING AND CALCULATE

· WIRE DIAMETER

· MEAN COIL DIAMETER

· NUMBER OF ACTIVE COIL

· TOTAL NUMBER OF COILS

· FREE LENGTH OF COIL

· PITCH OF COIL

QUE NO. – 6

(A) DISCUSS AND EXPLAIN THE FOLLOWING TERMS:

· HYDRODYNAMIC LUBRICATION?

· BEARING CHARACTERISTICS NUMBER?

· SOMMER FIELD NUMBER?

· OPERATING PRESSURE?

(B) SELECT A SINGLE ROW DEEP GROOVE BALL BEARING FOR A RADIAL LOAD OF 5000N AND AXIAL LOAD OF 6000N, OPERATING AT A SPEED OF 1600 RPM FOR AN AVERAGE LIFE OF 5 YEARS AT 10 HOURS PER DAY ASSUME UNIFORM AND STEADY LOAD?

QUE NO. – 7

DESIGN A CONNECTING ROD FOR A PETROL ENGINE FROM THE FOLLOWING DATA.

DIAMETER OF PISTON = 110 MM

MASS OF RECIPROCATING PARTS, M = 2 KG

LENGTH OF CONNECTING ROD, l = 325 MM

STROKE = 150 MM

COMPRESSION RATIO = 4:1

SPEED = 1500 RPM WITH POSSIBLE OVER SPEED OF 2500 RPM

MAXIMUM EXPLOSION PRESSURE = 2.5 MPa

QUE NO. – 8

DESIGN AND DRAW A CAST IRON FLY WHEEL USED FOR A FOUR STROKE IC ENGINE DEVELOPING 180 KW AT 240 RPM THE HOOP OR CENTRIFUGAL STRESS DEVELOPED IN THE FLY WHEEL 5.2 MPa, THE TOTAL FLUCTUATION OF SPEED IS TO BE LIMITED TO 3 % OF MEAN SPEED. THE WORK DONE DURING THE POWER STROKE IS 1/3 MORE THAN AVERAGE WORK DONE DURING WHOLE CYCLE? THE MAXIMUM TORQUE ON THE SHAFT IS TWICE THE MEAN TORQUE. THE DENSITY OF CAST IRON IS 7220 KG/MM³?

PREVIOUS YEAR UNSOLVED QUESTION PAPERS – 2 (KURUKSHETRA UNIVERSITY)

MACHINE DESIGN - 11

QUE NO. – 1

(A) DEFINE LAW OF GEARING. HOW ARE THE GEAR CLASSIFIED?

(B) DEFINE FORMATIVE NUMBER OF TEETH ON A HELICAL GEAR. ALSO GERIVE THE EXPRESSION USED TO OBTAIN ITS VALUE?

QUE NO. – 2

A WORM GEAR DRIVE TRANSMITS 15 KW AT 2000 RPM TO A MACHINE CARRIAGE AT 75 RPM. THE WORM IS TRIPLE THREADED AND HAS 65 MM PITCH DIAMETER THE WORM GEAR HAS 90 TEETH OF 6 MM MODULE. THE TOOTH FORM IS TO BE 20° FULL DEPTH INVOLUTE BTHE COEFFICIENT OF FRICTION BETWEEN MATING TEETH MAY BE TAKEN AS 0.10 CALCULATE

· TANGENTIAL FORCE ACTING ON WORM?

· AXIAL THRUST & SEOERATING FORCE ON WORM?

· EFFICIENCY OF THE WORM DRIVE?

QUE NO. – 3

DESIGN BELT DRIVE TO TRANSMIT 110 KW FOR SYSTEM CONSISTING OF TWO PULLEYS OF DIAMETER 0.90 M & 1.2 M CENTER DISTANCE IS 3.6 M AND BELT SPEED IS 20 M/S. THE CO EFFICIENT OF FRICTION IS 0.3 A SLIP OF 1.2 % AT EACH PULLEY AND 5% FRICTION LOSS AT EACH SHAFT, 20% OVER LOAD ?

QUE NO. – 4

(A) DETERMINE THE MAXIMUM, MINIMUM & AVERAGE PRESSURE IN A PLATE CLUTCH WHEN AXIAL FORCE IS 4 KN. THE INSIDE RADIUS OF THE CONTACT SURFACE IS 50 MM AND OUTSIDE RADIUS IS 100 MM. ASSUME UNIFORM WEAR?

QUE NO. – 5

DESIGN A HELICAL COMPRESSION SPRING FOR A MAXIMUM LOAD OF 1000 N FOR A DEFLECTION OF 25 MM. USE VALUE OF SPRING INDEXAS 5. THE MAXIMUM PERMISSIBLE SHEAR STRESS FOR SPRING WIRE IS 420 MPa & MODULUS OF RIGIDITY IS 84 KN/MM². TAKE WAHL’S FACTOR?

QUE NO. – 6

(A) DIFFERENTIATE BETWEEN HYDRODYNAMIC LUBRICATION & WEDGE FILM LUBRICATION?

(B) DESIGN A JOURNAL BEARING TO SUPPORT A LOAD OF 5000 N AT 5000 RPM USING HARDENED STEEL JOURNAL AND BRONZE BACKED BABBIT BEARING. THE BEARING IS LUBRICATED BY OIL, ROOM TEMP IS 25°C AND OIL TEMP IS 80°C?

QUE NO. – 7

A FOUR STROKE DIESEL ENGINE HAS FOLLOWING SPECIFICATIONS:

BRAKE POWER = 5KW, SPEED = 1200 RPM, INDICATED MEAN EFFECTIVE PRESSURE = 0.35 N/MM², MECHANICAL EFFICIENCY = 80 %. DETERMINE

· BORE AND LENGTH OF CYLINDER?

· THICKNESS OF CYLINDER HEAD?

· SIZE OF STUDS FOR CYLINDER HEAD?

QUE NO. – 8

A SINGLE CYLINDER DOUBLE ACTING STEAM ENGINE DEVELOPS 150 KW AT MEAN SPEED OF 80 RPM. THE COEFFICIENT OF FLUCTUATION OF ENERGY IS 0.1 AND FLUCTUATION OF SPEED IS ± 2% OF MEAN SPEED. IF THE MEAN DIAMETER OF FLY WHEEL RIM IS 2 METER AND HUB & SPOKES PROVIDE 5% OF ROTATIONAL INERTIA OF THE WHEEL, FIND THE MASS OF THE FLY WHEEL AND CROSS SECTIONAL AREA OF RIM. ASSUME DENSITY OF FLY WHEEL MATERIAL (CAST IRON) AS 7200 KG/M³ ?

PREVIOUS YEAR UNSOLVED QUESTION PAPERS – 3 (KURUKSHETRA UNIVERSITY)

MACHINE DESIGN - 11

QUE NO. – 1

A V – BELT TRANSMITS 11 KW AT 900 RPM OF THE SMALLER SHEAVE. THE SHEAVE PITCH DIAMETER ARE 175 MM & 346 MM. THE CENTER DISTANCE IS 760 MM. IF THE MAXIMUM PERMISSIBLE WORKING FORCE PER BELT IS 560 N, DETERMINE NUMBER OF BELTS REQUIRED IF THE CO EFFICIENT OF FRICTION IS 0.15 AND GROOVE ANGLE OF SHEAVE IS 34°. THE BELT MASS IS 0.194 KG/M.

QUE NO. – 2

(A) WHAT IS NECESSARY TO DISSIPATE THE HEAT GENERATED WHEN CLUTCHES OPERATE?

(B) A MULTIPLE DISC CLUTCH, STEEL ON BRONZE IS TO TRANSMIT 4 KW AT 750 RPM. THE INNER RADIUS OF CONTACT IS 40 MM & OUTER RADIUS OF CONTACT IS 70 MM. THE CLUTCHES OPERATES IN OIL WITH AN EXPECTED CO EFFICIENT OF FRICTION AS 0.10. THE AVERAGE ALLOWABLE PRESSURE IS 350 KN/M² MAXIMUM.

· HOW MANY DISCS OF STEEL & BRONZE ARE REQUIRED

· WHAT IS AVERAGE PRESSURE

· WHAT AXIAL FORCE IS REQUIRED

· WHAT IS THE ACTUAL MAXIMUM PRESSURE

QUE NO. – 3

(A) WHAT DO YOU UNDERSTAND BY FULL LENGTH AND GRADUATED LEAVES OF A SPRING?

(B) THE FREE END OF A HORIZONTAL CONSTANT STRENGTH STEEL CANTILEVER BEAM IS DIRECTLY OVER AND IN CONTACT WITH A VERTICAL COIL SPRING. THE WIDTH OF THE BEAM AT ITS FIXED END IS 600 MM, ITS LENGTH 800 MM AND ITS THICKNESS IS 12 MM. THE COIL SPRING HAS 10 ACTIVE COILS OF 12.5 MM DIAMETER WIRE AND HAS AN OUTSIDE DIAMETER OF 100 MM. TAKE MODULUS OF RIGIDITY, G = 83 × 10³ N/MM² AND MODULUS OF ELASTICITY, E = 200 × 10³ N/MM²,

· WHAT FORCE Q, IF GRADUALLY APPLIED TO THE END OF THE CANTILEVER BEAM IS REQUIRED TO CAUSE A DEFLECTION OF 40 MM?

· WHAT IS BENDING STRESS IN THE BEAM AT A SECTION 400 MM FROM THE FIXED END?

· HOW MUCH ENERGY IS ABSORBED BY COIL SPRING?

QUE NO. – 4

(A) WHAT IS MEANT BY HYDRODYNAMIC LUBRICATION? ENUMERATE FACTOR THAT INFLUENCE MOST IN THE FORMATION AND MAINTAINANCE OF THICK OIL FILM?

(B) DESIGN A JOURNAL BEARING FOR A CENTRIFUGAL PUMP, TO SUPPORT A LOAD OF 1000 KG RUNNING AT 800 RPM OIL USED IN SAE NO. 10 THE TEMPERATURE OF THE OIL IS 60° C AND AMBIENT TEMPERATURE IS 15.5° C ASSUME ALL NECESSARY DATA. THE OPTIMUM DIAMETER IS 80 MM?

QUE NO. – 5

A PAIR HELICAL GEARS MOUNTED ON PARALLEL SHAFTS HAVE NORMAL MODULE OF 6 MM, NORMAL PRSSURE ANGLE OF 20° AND FACE WIDTH OF 75 MM. THE 32 TEETH PINION & 44 TEETH GEAR ARE MADE OF SAE 2320 STEEL ( c = 0.18 TO 0.23% ; N_i = 3.25 TO 3.75%). THE PINION IS HARDENED TO 400 BHN & GEAR TO 350 BHN. THE CENTER DISTANCE IS 250 MM APPROXIMATELY.

· WHAT HELIX ANGLE IS REQUIRED?

· ESTIMATE THE POWER THAT CAN BE TRANSMITTED IF PINION ROTATES AT 960 RPM AND LOAD INVOLVES MEDIUM SHOCK?

QUE NO. – 6

DESIGN A CAST IRON PISTON FOR A SINGLE ACTING FOUR STROKE ENGINE FOR THE FOLOWING DATA:-

CYLINDER BORE = 100 MM; STROKE = 125 MM; MAXIMUM GAS PRESSURE = 5 N/MM²; INDICATED MEAN EFFECTIVE PRESSURE = 0.75 N/MM^2; MECHANICAL EFFICIENCY = 80%; FUEL CONSUMPTION = 0.15 KG/BRAKE POWER/HOUR; HIGHER CALORIFIC VALUE OF FUEL = 42 × 10³ KJ/KG; SPEED = 2000 RPM; ANY OTHER DATA REQUIRED FOR DESIGN MAY BE ASSUMED?

QUE NO. – 7

A SINGLE CYLINDER DOUBLE ACTING STEAM ENGINE DEVELOPS 150 KW AT MEAN SPEED OF 80 RPM. THE COEFFICIENT OF FLUCTUATION OF ENERGY IS 0.1 AND FLUCTUATION OF SPEED IS ± 2% OF MEAN SPEED. IF THE MEAN DIAMETER OF FLY WHEEL RIM IS 2 METER AND HUB & SPOKES PROVIDE 5% OF ROTATIONAL INERTIA OF THE WHEEL, FIND THE MASS OF THE FLY WHEEL AND CROSS SECTIONAL AREA OF RIM?

QUE NO. – 8

DESIGN A CRANE HOOK WITH THE USEFUL LOAD LIFTING CAPACITY OF THE CRANE AS 70 KN AND THE WEIGHT OF THE HOOK WITH GRABBING TONGS AS 11 KN. DRAW A NEAT SKETCH OF THE CRANE HOOK?

PREVIOUS YEAR UNSOLVED QUESTION PAPERS – 4 (KURUKSHETRA UNIVERSITY)

MACHINE DESIGN - 11

QUE NO. – 1

(A) EXPLAIN THE DIFFERENT CAUSES OF GEAR TOOTH FAILURE AND SUGGEST POSSIBLE REMEDIES TO AVOID SUCH FAILURE?

(B) A HELICAL GEAR SPEED REDUCER IS TOBE USED WITH A 2000 RPM ELECTRIC MOTOR AND 500 RPM LOAD FOR MODERATE AMOUNT OF SHOCK. THE 24 TEETH PINION HAS A NORMAL MODULE OF 3 MM, THE FACE WIDTH OF 40 MM, THE NORMAL PRESSURE ANGLE OF 20° AND HELIX ANGLE OF 23° (BHN 262). BOTH GEAR AND PINION ARE MADE OF STEEL WITH CASE HARDENING. ESTIM ATE THE POWER THAT CAN BE TRANSMITTED BY REDUCER. WILL THE HEAT TREATMENT BE SUFFICIENT FROM WEAR, POINT OF VIEW?

QUE NO. – 2

DETERMINE PROPER PITCH MODULE, FACE WIDTH, NO OF TEETH AND OUTSIDE DIAMETER OF A PAIR OF 20 INVOLUTE FULL DEPTH SPUR GEAR TO TRANSMIT 112.5 KW FROM A PINION RUNNING AT 750 RPM TO A GEAR RUNNING AT 140 RPM. THE SERVICE IN INTERMITTENT WITH LIGHT SHOCKS?

QUE NO. – 3

(A) DESIGN A CONE CLUTCH HAVING LEATHER FACING MUST TRANSMIT 10 KW AT A SPEED OF 1000 RPM. THE MEAN DIAMETER OF A CLUTCH IS 200 MM. ALSO CALCULATE THE FORCE REQUIRED TO ENGAGE THE CLUTCH.

(B) EXPLAIN WHAT IS SELF ENERGIZING BRAKE? WHEN A BRAKE BECOME SELF LOCKING?

QUE NO. – 4

A 40 KW, 1000 RPM AC MOTOR IS TO DRIVE A PUMP AT A SPEED OF 300 RPM. THE PUMP IS FOR 12 Hr. PEDRAY SERVICE. THE CENTER DISTANCE IS TO BE 1.25 M. DETRMINE THE DETAILS OF A MULTIPLE V-BELT DRIVE i.e. PULLEY DIAMETER, NO. OF BELT. ALSO DRAW A NEAT SKETCH?

QUE NO. – 5

(C) EXPLAIN THE FOLLOWING TERMS IN BEARING:-

· BEARING NUMBER

· SOMMER FIELD NUMBER

· BEARING LIFE

· BEARING MODULUS

· REALIBILITY OF BEARING

(D) A BEARING IS REQUIRED TO CARRY 500 N STATIONARY RADIAL LOAD. THE SHAFT ROTATES AT 1000 RPM AND LIFE DESIRED IS 30,000 Hrs. THE RUNNING CONDITIONS ARE STEADY NO SHOCK LOADING. SELECT A SUITABLE BEARING?

QUE NO. – 6

(E) EXPLAIN WHAT DO YOU UNDERSTAND BY A.M WAHL’S FACTOR AND STATE ITS IMPORTANCE IN THE DESIGN OF HELICAL SPRINGS. WHEN A HELICAL COIL SPRING OF WIRE DIAMETER ‘d’ & MEAN COIL DIAMETER “D” IS SUBJECTED TO AXIAL LOAD W THEN TORSIONAL SHEAR STRESS INDUCED IN THE SPRING AS GIVEN AS

(F) DESIGN A HELICAL SPRING FOR LOADED SAFETY VALUE FOR THE FOLLOWING DATA.

· DIAMETER OF VALVE SEAT = 65 MM

· OPERATING PRESSURE = 0.7 N/MM²

· MAXIMUM PRESSURE = 0.75 N/MM²

· MAXIMUM LIFT OF VALVE = 3.5 MM

· MAXIMUM ALLOWABLE STRESS = 550 MPa

· MODULUS OF RIGIDITY = 84 KN/MM²

· SPRING INDEX – 6

DRAW A NEAT SKETCH OF SPRING SHOWING THE MAIN DIMENSIONS

QUE NO. – 7

DESIGN A CAST IRON PISTON FOR A SINGLE ACTING FOUR STROKE ENGINE FOR FOLLOWING DATA :

· CYLINDER BORE = 90 MM

· STROKE = 120 MM

· MAXIMUM GAS PRESSURE = 5 N/MM²

· MEAN EFFECTIVE PRESSURE = 0.75 N/MM²

· MECHANICAL EFFICIENCY = 80%

· FUEL CONSUMPTION = 0.2 KG PER BRAKE POWER PER HOUR

· HIGHER CALORIFIC VALUE OF FUEL = 43 × 10³ KJ/KG

· SPEED = 2000 RPM

ANY OTHER DATA REQUIRED FOR THE DESIGN MAY BE ASSUMED.

QUE NO. – 8

DESIGN A CRANE HOOK (SHANK TYPE) WITH LOAD LIFTING CAPACITY OF THE CRANE IS 90 KN. THE WEIGHT OF THE HOOK WITH GRABBING TONG IS 30 KN. ALSO DRAW A NEAT SKETCH OF THE HOOK?

PREVIOUS YEAR UNSOLVED QUESTION PAPERS – 5 (KURUKSHETRA UNIVERSITY)

MACHINE DESIGN - 11

QUE NO. – 1

DESIGN COMPLETELY 20° FULL DEPTH PAIR OF SPUR GEAR TO TRANSMIT A SMOOTH CONTINUOUS LOAD OF 40 KW AT 1400 RPM OF 20 TEETH PINION. THE VELOCITY RATIO IS 3 AND MATERIAL IS TO BE STEEL. CHECK THE DESIGN FOR DYNAMIC LOAD & WEAR.

QUE NO. – 2

DESIGN 20° INVOLUTE WORM & WORM GEAR THAT IS TO GTRANSMIT 11.25 KW BETWEEN SHAFTS THAT ARE 0.25 M APART. THE SPEED REDUCTION IS 10.5 TO 1.0 AND DRIVING SHAFT IS RUNNING AT 1200 RPM?

QUE NO. – 3

(A) DIFFERENCE BETWEEN CLUTCH & BRAKE. NAME VARIOUS TYPES OF CLUTCHES & BRAKE USED IN AUTOMOBILE?

(B) DESIGN A DRY SINGLE PLATE CLUTCH FOR THE FOLLOWING DATA:-

· POWER TO BE TRANSMITTED = 15 KW

· SPEED = 1000 RPM

QUE NO. – 4

(A) DESIGN A CHAIN DRIVE FOR THE FOLLOWING DUTY :

· POWER TO BE TRANSMITTED = 6 KW

· SPEED OF MOTOR SHAFT = 1000 RPM

· SPEED OF DRIVEN SHAFT = 500 RPM

· CENTER DISTANCE = 600 MM

QUE NO. – 5

A SEMI – ELLIPTICAL LAMINATED SPRING 900 MM LONG AND 55 MM WIDE IS HELD TOGETHER AT THE CENTER BY BAND 50 MM WIDE. IF THE THICKNESS OR EACH LEAF IS 5 MM, FIND NUMBER OF LEAVES REQUIRED TO CARRY A LOAD OF 4500 N. ASSUME A MAXIMUM WORKING STRESS OF 490 MPa. IF THE TWO LEAF EXTEND THE FULL LENGTH OF THE SPRING, FIND THE DEFLECTION OF THE SPRING. THE YOUNG’ S MODULUS OF THE SPRING MATERIAL MAY BE TAKEN AS 210 KN/MM².

QUE NO. – 6

A JOURNAL BEARING IS TO BE DESIGNED FOR A CENTRIFUGAL PUMP FOR THE FOLLOWING DATA:-

· LOAD ON JOURNAL = 12 KN

· DIAMETER OF JOURNAL = 75 MM

· SPEED = 1440 RPM

· ATMOSPHERIC TEMPERATURE OF OIL = 16°C

· OPERATING TEMPERATURE OF OIL = 60°C

· ABSOLUTE VISCOSITY OF OIL AT 60°C = 0.023 KG/M-S

GIVE A SYSTEMATIC DESIGN OF BEARING?

QUE NO. – 7

DESIGN THE CONNECTING ROD OF AN IC ENGINE FOR THE FOLLOWING DATA :-

· PISTON DIAMETER = 0.15 M

· STROKE = 0.215 M

· LENGTH OF THE CONNECTING ROD = 0.5 M

· WEIGHT OF RECIPROCATING PARTS = 275 N

· SPEED = 2000 RPM WITH POSSIBLE OVER SPEED OF 3000 RPM

· COMPRESSION RATIO = 5:1

· PROBABLE MAXIMUM EXPLOSION PRESSURE = 3.5 MPa

QUE NO. – 8

DESIGN CRANE HOOK FOR A LIFTING CAPACITY OF 50 KN WITH 50 PERCENT OVER LOAD. SKETCH THE DESIGNED HOOK AND MENTION DIMENSION ON IT?