Question Set 44
Question No. 1 In which section of the steam-turbine rotors is the problem of rotor failure mostly prevalent? Answer: Rotor failures occur mostly on the large low-pressure rotors. Question No.…
Question Set 43
Question No. 1 What is the possible cause of slow start up of a steam turbine? Answer: This may be due to high starting torque required by the driven equipment.…
Question Set 42
Question No. 1 What is the purpose of a turning gear? Answer: Heat must be prevented from warping the rotors of large turbines or high-temperature turbines of 400°C or more.…
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…
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…
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…
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…
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…
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…
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…
