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Kurukshetra University 2010 B.E Mechanical Engineering Universal Insttof Technonlogy - Question Paper

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UNIVERSAL INSTITUTE OF TECHNOLOGY SESSIONAL TEST - 3^rd BRANCH- ( MECHANICAL 3^rd SEM ) SUBJECT- THERMODYNAMICS

TIME-1.30HRS M.M.-20

Attempt any two question . all question carry equal marks.

Q 1. 20 kg. of water at 90c. is mixed with 30 kg. of water at 30c., and the pressure remain constant during the mixing operation . calculate the decrese in available energy , it may be presume that the surround are at 10 drg.c. temperature and for water.

Take c_p= 4.18 kj/kg k

Q 2. show that for a perfact gas, the difference between the specific heat (c_p-c_v) can be expressed as

(cp-c_v) = [p+(du/dv)_t](dv/dt)p=pvp+vp(du/dv)_t where p is the coefficient of volume expansion.

Q 3. explain relation for internal energy and enthalpy.

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NCH- (MECHANICS MCHINE DRAWING

SESSIONAL TEST - 3^rd BRANCH- ( MECHANICAL ENGG. 3^rd SEM.)

TIME-1.30HRS

M.M.-20

Attempt any one question. all question carry equal marks.

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Q 2. . assemble the various parts of lathe tail stock . Show the fig. 2

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UNIVERSAL INSTITUTE OF TECHNOLOGY SESSIONAL TEST - 3^rd

BRANCH - MECHANICAL ENGG. (3^rd SEM.) SUBJECT - STRENGTH OF MATERIAL-1

MAX. MARKS- 20 TIME -1.30 HOURS

Q.l Compare the crippling loads given by Ranldne and Eulers formula for a tubular strut 225cm long having outer and inner diameter j7,5mm,32.5mm respectively loaded pin joints at both ends. Take yield stress as 31.5KN\cm², a = 1/7500 and E 2x10 KN/cnr.If the elastic limit of material is taken as 20KN\cm below what length of strut does the Eulers formula cease to apply. /jm

Q.2 A beam AB of span 8m is simply supported at ends A and B and is loaded as shown in figure. Taking E= 2X10⁸KN\m² and 1= 8.6X10 mm⁴. Find the position and magnitude of maximum deflection.

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