Engineering and Technology

 Inverter role in today's power system in Pakistan What is inverter Inverter is an electronic equipment used to convert Direct current DC power into Alternating Current AC power and serve electrical power needs to daily life like power electricity company. There are different types and models of inverters today commonly used everywhere. The choice of a proper inverter for a power system needs requirements consideration and depends upon the budget available to meed certain power needs. In older days such inverters were used as back up system with a 12V lead acid battery. Such inverters were normally square wave type or modified sine wave type of inverters. They were commonly used to meet some power needs during power outage or load shading times. Such inverters were used as inverters as well as battery chargers and they were commonly referred as ups or un interrupted power supply. Such inverters were providing crude power and mostly fans and motors were creating noise and there were

Boiler engineer examination exam instructions for 3rd class boiler engineering students:   تھرڈ کلاس بوائیلر انجینئر امتحان کی تیاری کے لئے چند ہدایات جیسا کہ ہم لوگ جانتے ہیں کہ بوائیلر اہم اور خطرناک مشینری ہے۔ ہم اس کے لئے کہ اس کے بغیر پلانٹ نہیں چلائے جاسکتے اور اس کی ورکنگ (اپریشن) میں چھوٹی سی کو تاہی بہت بڑے حادثہ کا سبب بن سکتی ہے۔ جس میں اپریٹر کی جان بھی جاسکتی ہے۔ قریبی بلڈنگ کے نقصان کے ساتھ ساتھ بہت سے لوگ مریا زخمی بھی ہو سکتے ہیں۔ اس لئے ان اپریٹرز کو ہی ہو ائیلر انجینئر کا امتحان دینا چاہئے جو بوائیلر کی اپریشن میں مہارت رکھتے ہوں۔ صرف امتحان پاس کر لینا ہی کافی نہیں ہوتا۔ کام کو سیکھنے کا شوق دل میں ہر وقت رہنا چاہئے چونکہ یہ کتاب تھرڈ کلاس بوائیلر انجینئر کے امتحان کی تیاری کے لئے ترتیب دی گئی ہے اس لئے اس میں صرف بنیادی سطح کی Information ہی آپ کو ملیں گی۔   بوائیلر کا امتحان دینے کے اہل لوگ 1۔ بوائیلر اپریٹر فائر مین جو صرف بوائیلر کی اوپریشن کا کام کرتے ہیں۔ 2۔ بوائیلٹر کے علاوہ دوسری مشینری مثلا واٹر ٹریٹ منٹ پلانٹ ۔ ریفریجریشن سیکشن انسٹرو مینٹ وغی

Dua duua duaa method and benifits  بِسْمِ اللهِ الرَّحْمَنِ الرَّحِيمِ دعا عبادت ہے مقدمہ دعا کی اہمیت و فضیلت نبي ﷺ نے فرمایا: الدُّعَاءُ هُوَ الْعِبَادَةُ قَالَ رَبُّكُمُ ادْعُونِي أَسْتَجِبْ لَكُمْ . دعا عبادت ہے تمھارے رب کا فرمان ہے ۔ " تم مجھ سے دعا کرو، میں قبول کروں گا ۔ (سنن ابی داود: 1479 ( اللہ کے نزدیک دعا سے زیادہ کوئی چیز معزز نہیں رسول اللہ ﷺ نے فرمایا: لَيْسَ شَيْءٌ أَكْرَمَ عَلَى اللهِ مِنَ الدُّعَاءِ . اللہ کے نزدیک دعا سے زیادہ کوئی چیز معزز نہیں ۔ (مسند احمد : 8748 ( اللہ تعالیٰ خود بندے کو دعا کرنے کے لیے پکارتا ہے نبی ﷺ نے فرمایا: يَنزِلُ اللهُ إِلَى السَّمَاءِ الدُّنْيَا كُلَّ لَيْلَةٍ حِيْنَ يَمْضِى ثُلث اللَّيْلِ الأوّلُ فَيَقُولُ أَنَا المَلِك أنَا الْمَلِكُ مَنْ ذَا الَّذِي يَدْعُونِي فَأَسْتَجِيْبَ لَهُ مَنْ ذَا الَّذِي يَسْأَلُنِي فَأُعْطِيَهُ مَنْ ذَا الَّذِي يَسْتَغْفِرُنِي فَأَغْفِرُ لَهُ فَلَا يَزَالُ كَذلِكَ حَتّى يُضِيءَ الْفَجُرُ . جب رات کا پہلا تہائی حصہ گزر جاتا ہے تو اللہ تعالیٰ آسمان دنیا پر نزول فرماتے ہیں اور کہتے ہیں کہ میں بادشاہ ہ

What is air circuit breaker. Electrical protection What is air circuit breaker or ACB: Air circuit breaker or ACB is electrical protection device used in electrical system to provide electrical circuit isolation in case of short circuit or over current condition. Also the air circuit breaker or ACB is used to isolate the electrical circuit manually when it is required in case of maintenance on the connection equipment or if it is needed to stop the equipment for long time. Air circuit breakers are used on low voltage like up to 700v and currents from 200A to 6200A. Some air circuit breakers are especially designed to meed voltages up to 1000 volts. Such circuit breakers are designed for the control of photo voltaic or solar systems. Air circuit breaker named because the media used between the contacts for quenching arc on electrodes during circuit making and breaking is air. The contacts operates in air. Sometimes this is just normal pressure air and some times it is pressurized air to

 How to change Toyota Corolla engine oil Toyota cars like Toyota Corolla or any other brand needs 5w-30 grade engine oil. There are different myth regarding Toyota Corolla engine oil change interval. Some says change oil each 5,000 miles. Some says change oil after 15,000 miles or after every six to ten months. And some says whatever come first.  Such are just assumptions and there are no pet and fix formulas or rules. Better is to change oil at its earliest. The oil change interval should not be very short that someone consider it after 10 miles! and shouldn't be very long like someone consider it after 15,000 miles. It should be somewhere in between. Better if someone consider Toyota Corolla oil change after completion of 2500 miles. Also for the purpose an average price oil should be considered. Because if one consider high priced oil, the oil change will become very expensive will be difficult. There is a another myth about Toyota Corolla engine oil grades. Some says put 0W5 ot

  Advantages of Iron Phosphate batteries World class new generation Lithium Iron Phosphate batteries whose chemical name is LiFePO4 or LFP for short provides great benifites and advantages over conventionnal lead acid batteries and the rest of other all kind of batteries available. The Lithium Iron Phosphate batteries offer advantages like greater safety, Improved efficiency of charge and discharge, Less in weight, Very long life, no maintenance requirement and much more. With all above advantages, price is the big disadvantage of such Lithium Iron Phosphate batteris. Lithium Iron Phosphate batteries are not cheaper. They are much more costly than lead acid battery, Ni-cal Cadmium batteries or regular lithium batteries. But keeping in view of Lithium Iron Phosphate batteries benefits and advantages like very long service life or 20 to 25 years, one can make his life best investment in such Lithium Iron Phosphate batteries. Lithium iron phosphate HIGH efficiency Lithium Iron Phosphate b

 Throttle Body cleaning washing DIY procedure If car maintenance is considered timely, it reduce the downtime cost, fuel running cost and increase the vehicle service life. Also if you consider the timely maintenance your car will be more promising and more cooperative to you. In car maintenance some parts do need replacement and some only needs cleaning. Debris, dust and dirt settling on the car components leads to a major car maintenance job and serious repair work. Throttle body is the major part of newer cars which needs periodic and regular cleaning and washing. Throttle body is located in the engine air intake system. All the air sucked through the engine passes through the throttle body. A throttle body passes 10,000 liters of air to burn 1 liter of gasoline or petrol. Although there is an air filter installed in the car air intake before the throttle body, but fine dust passes that filter and accumulates in the throttle body. Throttle body cleaning can either be performed by a