in Contactor opearation Why there is a difference in the values of the operate and release voltage in case AC supply

809

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I am Facing Issues with learing datepicker 1)when i first learn datepicker as current system date . 2)if i wanna runtime datepicker value it gives error

1731

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how does vb script help in web page designing? explain with example.

949

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Why reactive power is needed in a power system? How is it being absorbed or delivered by alternators? For reactive power control we are changing excitation but reactive power absorbing or delivering related to stator. How these two are interlinked? i want a detailed explanation with necessary expressions and figures?

638

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1.can you use SCADA instead of DCS,DCS instead SCADA 2.Difference between DCS and PLC,can their role be reversed i.e. role interchange 3.Difference between RTU and PLC

1425

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Hi,How much gap is there between Paper-I,II and III of Group-II exams?

890

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How to write the query . eid enm doj dob i want to display the names who worked more than 25 years .

588

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HI SIR, AM PREPARING FOR RRB FOR SECTION ENGINEER POST. PLZ SEND ME THE PREVIOUS QUESTION PAPERS AND HELP ME. I HAVE NO ENOUGH TIME MY EXAM DATE IS 22ND JUNE.... MY EMAIL ID IS nalla.amarnath@gmail.com

724

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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

1061

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for 16mm thick cement plastring 1:6 on 100 Sq.m.New brick work,the quantity of cement required is.

727

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IS ANYONE FROM GUJARAT RECEIVED JOINING LETTER OF BOB CLERK 2011 , KINDLY POST IT or CONTACT BY EMAIL. sinhasanjiv73@gmail.com

1133

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Compare salient pole and cylindrical rotor machines.

784

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What is aircombining?

1048

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What r the mandatory fields in TD?

1301

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How many levels of Flexible Planning are there?

979

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