Question No. 1 What factors influence the amount of initial tension? Answer: The factors influence the amounts of initial tension are 1. External load 2. Material used 3. Bolt diameter Question No. 2 What is bolt of uniform strength? Answer: A bolt of uniform strength has equal strength at the thread and shank portion. Question No. 3 What…
Question No. 1 Define the term critical speed. Answer: The speed, at which the shaft runs so that the additional deflection of the shaft from the axis of rotation becomes infinite, is known as critical or whirling speed. Question No. 2 Factors considered designing a shaft? Answer: Strength and Stiffness Question No. 3 What is…
Question No. 1 Explain the difference between AFBC, BFBC, PFBC and CFBC in regard to fluidized bed technologies. Answer: AFBC (Atmospheric fluidized bed combustion) process consists of forming a bed of inert materials like finely sized ash or ash mixed with sand, limestone (for sulfur removal), and solid fuel particles in a combustor and fluidising it…
Question No. 1 How the analyses and calorific values of fuels can be reported? Answer: It may be reported as: (A) As received or fired (wet) basis (B) Dry or moisture free basis (C) Combustible or ash and moisture free basis Question No. 2 We have read that when the piston goes up and down…
Question No. 1 In convection heat transfer, if heat flux intensity is doubled then temperature difference between solid surface and fluid will? Answer: Get doubled. Question No. 2 How you can define coal? Answer: Coal is a naturally occurring hydrocarbon that consists of the fossilised remains of buried plant debris that have undergone progressive physical…
Question No. 1 Explain Otto cycle. Answer: Otto cycle can be explained by a pressure volume relationship diagram. It shows the functioning cycle of a four stroke engine. The cycle starts with an intake stroke, closing the intake and moving to the compression stroke, starting of combustion, power stroke, heat exchange stroke where heat is…
Question No. 1 Difference between Boiling Point and Melting Point. Answer: (A) The melting point is a defined for solids when it transfers from solid state to liquid state. (B) The boiling point is defined for liquids for a state change from liquid to gas. (C) Boiling point is highly dependent on the external pressure…
Question No. 1 How engine design needs to be changed to burn lean mixture? Answer: Engine to burn lean mixture uses high compression ratio and the highly turbulent movement of the charge is produced by the geometry of the combustion chamber. Question No. 2 Horse power of I.C. engines can be expressed as RAC rating,…
Question No. 1 What happens if gasoline is used in a Diesel engine? Will diesel engine work? Answer: No, it will not work, as the Compression ratio of Petrol engine is 6 to 10 & that of Diesel engine is 15 to 22. Thus on such high compression, gasoline gets highly compressed & it may…
Question No. 1 What are two essential conditions of perfect gas? Answer: It satisfies equation of state and its specific heats are constant. Question No. 2 Enthalpy and entropy are functions of one single parameter. Which is that? Answer: Temperature. Question No. 3 What is DTSI Technology? Answer: DTSI stands for Digital Twin Spark Plug…