what is isoseismal?

1. A single acting stage air compressor with 6% of clearance volume compresses air from 1.2 bar to 6.5 bar. Find the change in volumetric efficiency if the exponent of expansion process changes from 1.55 to 1.72.

2. Dry saturated steam at 3.5 bar is expanded through a convergent nozzle to 2.2 bar. The exit area is 5 sq. cm. Calculate the exit velocity and mass flow rate, assuming isentropic expansion and super saturated flow. b) A cast iron cylinder head is fastened to a cylinder of 750mm bore with 12 stud bolts. The maximum pressure inside the cylinder is 3 Mpa. The stiffness of part is thrice the stiffness of the bolt. What should be the initial tightening load so that the point is leak proof at maximum pressure? Also choose a suitable bolt for the above application 2 The propeller shaft of a marine engine is to transmit 600 kW at 1200 rpm, without a significant bending. The efficiency of the propeller is 88% at 32 knots ( 1 knot = 1085 km/hr). If the slenderness ratio is less than 50 and the permissible shear stress should not exceed 65 Mpa. Determine the diameter of shaft. 3 A semi-elliptic leaf spring consists of two extra full-length leaves and six graduated length leaves, including the master leaf. Each leaf is 7.2 mm thick and 65 mm wide. The centre-to-centre distance between the two eyes is 1.3m. The leaves are pre-stressed in such a way that when the load is maximum, stress induced in all leaves are equal to 380 N/mm sq. Determine the maximum force that the spring can withstand

if we increase the frequency given to a transformer then wat will happen to the transformer size, whether it will increase?

please send previous year que. paper of je mech rrb.

How calculate the Transformer Impedence With Example

a)tell density of steel , concrete, bricks , sand and aggregates.? b) what is knife test for wooden doors ? c) what is the meaning of term abrasion? what is tested in it? d) why pile foundation is provided in BCS?e) By total station what activities can be performed and on what principle it works? f) what is creep?

I am a technical graduate with 2 years of experience in automobile industry. i want to prepare for air force technical level examination. will u pls tell me what is the syllabus or do u have some model question papers???

How can we reduce the reactive power consumption of your 12.5 MVA power transformer.

what is motor

HBL Power Systems,

any book or article on pumped concrete.

How to decrease or increase the range of voltmeter? can an ammeter be used to measure voltage? can a wattmeter used as voltmeter and ammeter?

what is the difference between PLC & DCS

L&T,

When batteries are connected in series the voltage increases but the current remains unchanged, how can this be? When you consider ohm's law. i.e. If voltage increases, current increases, providing resistance remains the same.

What makes the difference between 50Hz supply and 60Hz supply which one is economical and how can you support your answer...........?

Fertichem, Kuwait Oil Company,