Asingle cylinder and stroke cycle l. c. engine when tested, the following observations avaiable: area of indcator dagram - 3 sq. cm, length of indctor dagram- 4 cm, spring constant 10 bar/cm, speed of engine 400 rpm, brake drum diameter 120 cm, dead weight on brake-380 n, spring balance reading = 50 n, fuel consumption= 2.8 kg/hr., cv- 42000 kj/kg, cylinder diameter 16 cm, piston stroke 20 cm. find: () f. p., (i) mechanical efficiency, (ii) bsfc, and (iv) brake thermal efficiency.

Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?