Download GTU B.Tech 2020 Summer 1st and 2nd Sem 3110006 Basic Mechanical Engineering Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Summer 1st and 2nd Sem 3110006 Basic Mechanical Engineering Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE ? SEMESTER 1&2 EXAMINATION ? SUMMER 2020
Subject Code: 3110006 Date:06/11/2020
Subject Name: Basic Mechanical Engineering
Time: 10:30 AM TO 01:00 PM
Total Marks: 70
Instructions:
1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.


MARKS
Q.1 (a) Discuss Closed, Open and Isolated Thermodynamic system with neat
03
sketch.

(b) Define the terms: Hardness, Toughness, Ductility, Elasticity
04

(c) Derive an expression for internal energy for a closed system
07


Q.2 (a) Distinguish between coupling and clutch.
03

(b) Explain Equivalent evaporation and factor of evaporation
04

(c)
The heat transfer from a heat reservoir is proportional to its
07
temperature: Justify by deriving equation.


OR


(c) Explain construction and working of centrifugal pump with a neat
07
sketch
Q.3 (a) Explain the construction and function of Steam Trap with neat sketch
03

(b) Write the uses of "Steam Tables"
04

(c) 1.5kg of steam at a pressure of 10bar and temperature of 250?C is
07
expanded until the pressure becomes 2.8 bars. The dryness fraction
of steam is then 0.9. Calculate change in Internal Energy


OR

Q.3 (a) List different mountings of boiler and explain any one in brief.
03

(b) Derive the equation for air standard efficiency of Otto cycle.
04

(c) A petrol engine with a stroke length of 200 mm and diameter of 150
07
mm has a clearance volume of 7 X 105 mm3. If the indicted thermal
efficiency is 0.30, find the relation efficiency. If the effective
pressure is 5 bar and engine runs at 1000 rpm. Find the IP of the
engine. take =1.4
Q.4 (a) Discuss wi
th neat sketch Diaphragm pump.
03

(b) Distinguish between Reciprocating and Rotary Compressor.
04

(c) Discuss the construction and working of four stroke Petrol engine.
07

OR

Q.4 (a) Draw a neat sketch of p-v diagram showing Free Air Delivery for air
03
compressor.

(b)
04
Define the terms `Refrigeration', "Ton of Refrigeration" and
"Coefficient of Performance"
1

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(c)
Calculate the energy consumed in one month for following
07
conditions: COP of air-conditioning unit : 5
Capacity of air conditioner :
2 TR No of air conditioners
: 8
All air conditioners run for 4 hours/day.
Q.5 (a) What is throttling calorimeter? Explain its limitation
03

(b) Discuss with neat sketch any two boiler accessories.
04

(c) Give comparison between Belt, Chain and Gear drive.
07


OR
Q.5 (a) How metals are classified? Show with block diagram
03
(b)
Define velocity ratio of pulleys and discuss effect of slip and creep on
04
motion transmission
(c)
Discuss the following with application and Properties:
07
(i) Glass
(i) Ceramic
(ii) Plastics

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