Articles Posted in the " heat " Category

  • PTU HEAT TRANSFER QUESTION PAPER SOLUTION-SECTION-A

    PTU HEAT TRANSFER QUESTION PAPER SOLUTION-SECTION-A

      PTU HEAT TRANSFER QUESTION PAPER SOLUTION-SECTION-A  Solution of university question is very helpful. It increases the clarity and understanding. Thus the knowledge is applied easily in practical applications. Q 1. Write briefly: (a) What is conduction shape factor? ANS: Conduction shape factor will be there for a plain wall, cylindrical body and a spherical […]


  • HEAT TREATMENT MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

    HEAT TREATMENT MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

      HEAT TREATMENT MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS  MCQ increases the understanding and clarity about heat treatment. More MCQ as well as other questions on heat treatment will be further useful. Sr. No. Heat Treatment Process 1. Annealing (i) Stress Relieving (ii)Spherodising (iii)Homogenizing (iv) Grain control size 2. Normalizing 3. Tempering 4. Isothermal Transformations […]


  • SENSIBLE HEAT FACTOR (SHF) CLASS NOTES FOR ENGINEERING

    SENSIBLE HEAT FACTOR (SHF) CLASS NOTES FOR ENGINEERING

      SENSIBLE HEAT FACTOR (SHF) CLASS NOTES FOR ENGINEERING Sensible means due to temperature difference. Consider both sensible and latent heat loads in air conditioning.  Remove these in the same ratio in which added. Suitable sensible heat factor makes air conditioning enjoyable. There are many types of sensible heat factors. (a) ROOM SENSIBLE HEAT FACTOR […]


  • HEAT TREATMENT CLASS NOTES FOR ENGINEERING

    HEAT TREATMENT CLASS NOTES FOR ENGINEERING

      HEAT TREATMENT   CLASS NOTES FOR   ENGINEERING      Heat treatment of steels gives different forms of modified micro-structures and modified desired physical, chemical and strength properties. Process of heat treatment does phase transformations during heating and cooling after changing a micro-structure in a solid state. These processes are mostly thermal only (Heating […]


  • HEAT EXCHANGERS QUESTION ANSWERS CLASS NOTES

    HEAT EXCHANGERS QUESTION ANSWERS CLASS NOTES

    HEAT EXCHANGERS QUESTION ANSWERS  CLASS NOTES Most common method of heat transfer is through the use of heat exchangers. There are many types of heat exchangers. Finned tube heat exchangers are most common. Q. Explain multi-pass heat exchangers? When are these used? These heat exchangers are of three types. 1. Firstly multi-pass shell heat exchanger […]


  • LMTD – PARALLEL & COUNTER FLOW HEAT EXCHANGER CLASS NOTES

    LMTD – PARALLEL & COUNTER FLOW HEAT EXCHANGER CLASS NOTES

    LMTD – PARALLEL & COUNTER FLOW HEAT EXCHANGER CLASS NOTES In a heat exchanger, temperature difference is variable all the length of the heat exchanger. There is a difficulty in handling variable temperature difference. Efforts are made to find the mean temperature difference. In case of heat exchanger the mean temperature difference comes in the […]


  • HEAT EXCHANGER CLASS NOTES FOR MECHANICAL ENGINEERING

    HEAT EXCHANGER CLASS NOTES FOR MECHANICAL ENGINEERING

    HEAT EXCHANGER CLASS NOTES FOR MECHANICAL ENGINEERING Heat exchanger transfers heat between two fluids separated by a solid wall in between. Cools the hot fluid. Heats the cold fluid. There are many types of heat exchangers. Different heat exchangers are used in different applications. Heat exchanger exchanges heat between two fluids with a solid wall […]


  • STEADY AND UNSTEADY STATE HEAT CONDUCTION CLASS NOTES

    STEADY AND UNSTEADY STATE HEAT CONDUCTION CLASS NOTES

    STEADY & UNSTEADY STATE HEAT CONDUCTION CLASS NOTES  Conduction is one of the three modes of heat transfer. Other modes of heat transfer are convection and radiation. Rate of heat transfer is directly proportional to the temperature difference. Conduction takes place in solids by physical contact. It is more in metals and least in non-metals. […]


  • CONVECTION HEAT TRANSFER CLASS NOTES FOR MECHANICAL ENGINEERING

    CONVECTION HEAT TRANSFER CLASS NOTES FOR MECHANICAL ENGINEERING

    CONVECTION HEAT TRANSFER CLASS NOTES FOR MECHANICAL ENGINEERING Convection heat transfer is of two types. That is free and forced convection. Free convection starts in stationary fluids. Forced convection heat transfer is in moving fluids. Motion is caused by a pump or a fan. It takes place in fluids (liquids, vapors and gases). Convection is […]


  • HEAT, WORK AND STEADY FLOW ENERGY EQUATION CLASS NOTES

    HEAT, WORK AND STEADY FLOW ENERGY EQUATION CLASS NOTES

    HEAT, WORK AND STEADY FLOW ENERGY EQUATION CLASS NOTES   COMPARISON BETWEEN HEAT AND WORK SIMILARITIES Sr No Heat Work 1 Form of energy Form of energy 2 Across a boundary Across a boundary 3 Cross the boundary whenever there is a change of state of a body Cross the boundary whenever there is a […]