Question Set 41

Question No. 1 What are the two basic types of steam turbines? Answer: 1. Impulse type. 2. Reaction type. Question No. 2 How can steam turbines be classified? Answer: The classification of steam turbine are as follows: By the action of steam: 1.     Impulse. 2.     Reaction. 3.     Impulse and reaction combined. The number of step reductions involved: 1.     Single…

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Question Set 40

Question No.1 Explain notch sensitivity. State the relation between stress concentration factor and notch sensitivity. Answer: Notch sensitivity (q) is the degree to which the theoretical effect of stress concentration is actually reached. The relation is, Kf = 1 + q (Kt-1) Question No.2 What are the factors that affect notch sensitivity? Answer: The factors effecting notch…

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Question Set 39

Question No.1 What are the types of fracture? Answer: The two types of fracture are 1.     Ductile fracture 2.     Brittle fracture Question No.2 Distinguish between brittle fracture and ductile fracture. Answer: In brittle fracture, crack growth is up to a small depth of the material. In ductile fracture large amount of plastic deformation is present to a…

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Question Set 38

Question No.1 Define Ductility. Answer: It is the property of the material enabling it to be drawn into wire, with the application of tensile force. It must be both strong and plastic. It is usually measured in terms of percentage elongation and reduction in area, (e.g.) Ni, Al, and Cu. Question No.2 Define fatigue. Answer:…

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Question Set 37

Question No. 1 What is the advantage of leaf spring over helical spring? Answer:       The advantage of leaf spring over helical spring is that the end of the spring may be guided along a definite path as it deflects to act a structural member in addition to energy absorbing device. Question No. 2 Write notes…

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Question Set 36

Question No. 1 Define pitch. Answer: Pitch of the spring is defined as the axial distance between the adjacent coils in uncompressed state. Mathematically Pitch=free length/n-1 Question No. 2 What are the points to be taken into consideration while selecting the pitch of the spring? Answer: The points taken into consideration of selecting the pitch…

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Question Set 35

Question No. 1 What are the end conditions of spring? Answer: 1.     Plain end. 2.     Plain and ground end 3.     Squared end 4.     Squared and ground end. Question No. 2       What is buckling of springs? Answer: The helical compression spring behaves like a column and buckles at a comparative small load when the length of the spring is more…

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Question Set 34

Question No. 1 What is a spring? Answer:                    A spring is an elastic member, which deflects, or distorts under the action of load and regains its original shape after the load is removed. Question No. 2 State any two functions of springs. Answer: 1.     To measure forces in spring balance, meters and engine indicators. 2.     To store…

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Question Set 33

Question No. 1 What is a journal bearing? Answer: A journal bearing is a sliding contact bearing which gives lateral support to the rotating shaft. Question No. 2 What are the types of journal bearings depending upon the nature of contact? Answer: The types of journal bearings are 1.     Full journal bearing 2.     Partial bearing 1.     Fitted bearing….

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Question Set 32

Question No. 1 What are the types of welded joints? Answer: The types of welded joints are 1.     Butt joint 2.     Lap joint 3.     T – joint 4.     Corner joint 5.     Edge joint. Question No. 2 What are the two types of stresses are induced in eccentric loading of loaded joint? Answer: The two types of stresses are induced in…

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