GTU BE 1st and 2nd Semester 110006 Elements of Mechanical Engineering Summer 2018 Question Paper

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE SEMESTER 1 & 2 ? EXAMINATION ? SUMMER 2018
Subject Code:110006 Date: 19-05-2018
Subject Name: Elements of Mechanical Engineering
Time: 02:30 pm to 05:00 pm Total Marks: 70
Instructions:
1. Attempt any five questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) (1) What is flow and non flow process? 07

(b) (2) Define: (i) Sensible heat (ii) Enthalpy of evaporation (iii) Latent heat
(iv) Dryness fraction
Explain working of four stroke petrol engine with neat sketch.

07

Q.2 (a) (1) state the function of the following:
(i) Pressure gauge (ii) Fusible plug (2) Describe working of two stroke cycle petrol engine.
07
(b) With neat sketch describe the construction and working of Cochran boiler. 07

Q.3 (a) (1) Give classification of governor. Explain any one with neat sketch. (2) Classify the centrifugal pump and explain vertex type centrifugal pump.
07
(b) Classify the air compressor. Differentiate between reciprocating compressor and
rotary compressor.
07

Q.4 (a) (1) What is refrigerant? State the most widely used refrigerant. (2) Explain vapour compression refrigeration cycle.
07
(b) Explain with neat sketch split air conditioner. State its advantages. 07

Q.5 (a) (1) What is zeroth law of thermodynamics? (2) Explain working of disc clutch.
07
(b) Write short note on all types of belt drive. 07

Q.6 (a) How prime movers are classified? Explain different sources of energy used by
them.
07
(b) Which are common solid fuels? Write in brief about each of them. Define
calorific value of fuel.
07

Q.7 (a) Write short note on the following materials: (i) Mild steel (ii) plywood (iii) fireclay
07
(b) Explain in brief: (i) muff coupling (ii) band brake (iii) warm gear.
07
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