Maharashtra State Board of Technical Education 2008-4th Sem Diploma Automobile Engineering Heat Power Engineering- - Question Paper
Sample Question Paper - I
Course : Automobile Engineering Group
Course Code : AE
9058
Time: 3 Hour
Semester : Fourth
Subject : Heat Power Engineering
Max Marks : 80
a) State Zeroth law of thermodynamics.
b) Define the term free air delivery (F. A. D.).
c) Enlist four non-conventional energy sources.
d) Define thermal conductivity and give its unit.
e) Identify types of calorimeters used for measuring calorific value of solids, liquids and gaseous fuels.
Q1: B) Attempt any Two of the following:
08 Marks
a) Point out parameters involved in the site selection of thermal power plant.
b) Explain with neat sketch working of Axial flow compressor
c) Classify gas turbine on the basis of a) cycle of operation b) thermodynamic cycle
c) Application d) fuels used.
Q.2: Attempt any three of the following:
12 Marks
a) One kg of ideal gas is heated from 180 C to 98 o C. Assuming R = 0.264 KJ / kg k and (cp / cv) = 1.18 for the gas. Find 1) Specific heats 2) Change in internal energy
3) change in enthalpy.
b) Draw a neat sketch of economizer and state its function.
c) State four appliances based on solar energy sources and draw neat-labeled sketch for any one.
d) Draw a neat block diagram of layout for thermal power plant Indicate flow direction.
a) Explain with neat sketch working principal of simple impulse turbine.
b) Draw P-V diagram of Brayton cycle used in gas turbine and explain thermodynamic processes involved in it.
c) Enlist modes of heat transfer. Explain the phenomenon of convection.
i. State Stefan-Boltzmans law
0 2
ii. Temperature of black surface is 650 c & surface area is 0.25 m . Calculate
total rate of energy emission.
Q4: Attempt any two of the following: 16 Marks
a) Describe Otto Cycle with Thermodynamic Processes on P-V and T-S Diagram
b) What are the requirements of good fuel? Calculate the higher calorific value of a fuel which contains carbon = 85%, Oxygen = 6%, Hydrogen = 6%, Sulphur = 1.5% and Ash = 1.5%
c) Calculate Heat required to convert 50 Kg of Steam at 7 bar pressure with dryness fraction = 0.8; into, Steam at 10 bar pressure with temperature = 2100 C. Take CP = 2.3 KJ / Kg K. Refer Steam Table for necessary values.
Q5: Attempt any three of the following: 12 Marks
a) Enlist non-conventional energy sources and state advantages of biodiesel as an alternative fuel.
b) 1. State Fouriers law.
2. The glass window of a car have a total area 4 square meter and the Thickness of the glass is 0.4 cm. Calculate rate at which heat enters into the car by conduction when temperature inside surface of window area is at 250 C and outside surface at 400 C. Take K= 0.837 W / m K
c) Illustrate with neat sketch working of turbo prop engine.
d) Give four advantages of gas turbine over steam turbine.
Q.6: Attempt any three of the following:- 12 Marks
a) Differentiate between Reciprocating Air Compressor and Centrifugal Air Compressor on the basis of - i) Delivery Pressure ii) Capacity iii) Speed
iv) Lubrication
b) Enlist the elements of steam condensing plant and mention the function of each element in one sentence
c) State two advantages of multistage compression. Draw P-V diagram for two stage single acting reciprocating air compressor and show saving in work done due to multistaging.
d) Write four advantages of gaseous fuels over solid fuels.
Figures to the right indicate full marks.
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| Earning: Approval pending. |
