Download VTU ((Visvesvaraya Technological University) B.E/B-Tech 2019 July ( Bachelor of Engineering) First & Second Semester (1st Semester & 2nd Semester) 2014 June-July 10EME14 Elements of Mechanical Engineering Question Paper
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PART ? A
1 a.
r
Choose the correct answers for the following : (04 Marks)
i) `
,
I:The centrifugal forces generated by the earth rotation on the far side results in another
bulge rise on this side of the earth.
A)
,
)Artar tides B) Earth quakes C) Volcanoes
ii) The condition of steam in the boiler is always,
A) Dry B) Wet
iii) Super heatei.1kused,
A) Inside tile:I:Oiler drum
C) In the path offhe gases to increase volume;of steam
13) To increase ternperature of steam above saturation temperature. LA
Babcock and Wilcox boiler is iv) :: '\: .
,
boiler. ? k? i
A) Fire tube Et) Water tube : ' ?,
u
` C) Air tube D) Fioxi tube
,
b. With the help of a temperature ? enthalpy diagram, explain the mechanism of its formation
of steam. (10 Marks)
c. Name any five boiler mounting and accessories and state their functions. (06 Marks)
C) Saturate4
B) TO :convert wet steam into dry steam
s.
D) Superheated
D) None of these
-,?.
(04 Marks)
B) In moving blades
D) ifilioth fixed and moving blades.
B) An impulse turbine, outward flow
D) Low head, axial flow.
First/Second Semester B.E. Degree Examination, June / July 2014
Elements of Mechanical Engineering
Time: 3 hrs. Max. Marks:100
Note: 1. Answer any FIVE full questions, choosing at least two from each part.
2. Answer all objective type questions only on OMR sheet page 5 of the answer booklet
3. Answer to objective type questions on sheets other than OMR will not be valued.
4. Use of steam tables is not permitted.
, ?
?
Important Note
2 a. Choose the correct answers for the following :A'
i) In reaction turbine, the,pressure drops,
A) In nozzles
C) In fixed blades
Kaplan turbine is,
A) A highhead mixed flow turbine
C) A reaction turbine, outward flow
iii) DelaVallurbine is a
A)=IMPulse turbine B) Reaction turbine
. C) Velocity compounded turbine D) Pressure compounded turbine.
iv) In a gas turbine, if the working substance is continously recirculated, then it is called
as,
A) Open cycle gas turbine B) Closed cycle gas turbine
C) Mixed flow gas turbine D) None of these
Differentiate between open cycle and closed cycle gas turbine with neat sketches.
c. Sketch and explain the working of a Kaplan turbine.
3 a. Choose the correct answers for the following :
i) In a 4 stroke CI engine during suction stroke,
A) Only air is sucked B) Only diesel is sucked
C) Both air and diesel are sucked D) Either air or diesel is sucked
ii) The inner diameter of engine cylinder is called as,
A) Stroke B) Clearance C) Bore D) Pitch
i)
(08 Marks)
(08 Marks)
(04 Marks)
1 of 3
10EME14/24
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PART ? A
1 a.
r
Choose the correct answers for the following : (04 Marks)
i) `
,
I:The centrifugal forces generated by the earth rotation on the far side results in another
bulge rise on this side of the earth.
A)
,
)Artar tides B) Earth quakes C) Volcanoes
ii) The condition of steam in the boiler is always,
A) Dry B) Wet
iii) Super heatei.1kused,
A) Inside tile:I:Oiler drum
C) In the path offhe gases to increase volume;of steam
13) To increase ternperature of steam above saturation temperature. LA
Babcock and Wilcox boiler is iv) :: '\: .
,
boiler. ? k? i
A) Fire tube Et) Water tube : ' ?,
u
` C) Air tube D) Fioxi tube
,
b. With the help of a temperature ? enthalpy diagram, explain the mechanism of its formation
of steam. (10 Marks)
c. Name any five boiler mounting and accessories and state their functions. (06 Marks)
C) Saturate4
B) TO :convert wet steam into dry steam
s.
D) Superheated
D) None of these
-,?.
(04 Marks)
B) In moving blades
D) ifilioth fixed and moving blades.
B) An impulse turbine, outward flow
D) Low head, axial flow.
First/Second Semester B.E. Degree Examination, June / July 2014
Elements of Mechanical Engineering
Time: 3 hrs. Max. Marks:100
Note: 1. Answer any FIVE full questions, choosing at least two from each part.
2. Answer all objective type questions only on OMR sheet page 5 of the answer booklet
3. Answer to objective type questions on sheets other than OMR will not be valued.
4. Use of steam tables is not permitted.
, ?
?
Important Note
2 a. Choose the correct answers for the following :A'
i) In reaction turbine, the,pressure drops,
A) In nozzles
C) In fixed blades
Kaplan turbine is,
A) A highhead mixed flow turbine
C) A reaction turbine, outward flow
iii) DelaVallurbine is a
A)=IMPulse turbine B) Reaction turbine
. C) Velocity compounded turbine D) Pressure compounded turbine.
iv) In a gas turbine, if the working substance is continously recirculated, then it is called
as,
A) Open cycle gas turbine B) Closed cycle gas turbine
C) Mixed flow gas turbine D) None of these
Differentiate between open cycle and closed cycle gas turbine with neat sketches.
c. Sketch and explain the working of a Kaplan turbine.
3 a. Choose the correct answers for the following :
i) In a 4 stroke CI engine during suction stroke,
A) Only air is sucked B) Only diesel is sucked
C) Both air and diesel are sucked D) Either air or diesel is sucked
ii) The inner diameter of engine cylinder is called as,
A) Stroke B) Clearance C) Bore D) Pitch
i)
(08 Marks)
(08 Marks)
(04 Marks)
1 of 3
10EME14/24
4 a. Choose the correct answerS:for,the following
i) The boiling point of aMMOnia is,
A) 100?C B) L 33.3?C C) 33.3?C D) 0?C
?..
n
ii) Most commonly used refrigerant i vapour absorption refrigeration system is,
C) SO2 D) NH
3
b.
c.
D) All of the above
What are the desirable properties of refrigerant? (06 Marks)
vapour With a neat sketch, explain the construction and working of vapour absorption refrigeration
system. (10 Marks)
A) Freon B) CO2,-
iii) Throttle value is used in refrigerator to,
A) Compress refrigerant
;
.B) Expand the refrigerant
C) Absorb the heat frOinthe refrigerant
-
':;11:3) Condense the refrigerant
iv) An ideal refrigerant Stiuld have,
A) Low viscosity..'' B) Low freezing point
C) Low boiling point
(04 Marks)
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10EME14/24
b.
c.
Q. NO. 3 (a) contd...
iii) In a diesel engine the fuel is ignited by,
A) Spark
B) Ignitor
C) Heat resulting from compressing air that is supplied for combustion
D) Combustion
iv) Piston speed is equal to,
A) Stroke * rpm B) 2*stroke*rpm C) 48 stroke*rpm D)
(stroke*rpm)
With, the neat sketch, explain the working of 4 stroke diesel engine. (08 Marks)
The following observations were obtained during a trial on a four stroke diesel engine:
Cylinder diameter = 25 cm; Stroke of the piston = 40.44 `-
Crank shaft,Speed = 250 rpm; Brake load = 70 kg -:',,,]
,
Brake drum diameter = 2 m; Mean effective pressure'
4
6 bar
Diesel oil consul:Option = 0.1 m
3
/min; CV = 43900 kJ/kg"
- .
s
,
Specific gravity of diesel = 0.78
Find : (i) BP - ,- (ii) IP (iii) F (iv) wee (08 Marks)
PART ? B
5 a. Choose the correct answers for the following :
i) The process of enlarging an already drilled hole is
A) Spot facing B) Reaming C) Tapping D)
ii) is the process of generating internal threads
A) Tapping B) Turning C) Knurling D)
iii) The slowest speed in Lathe is adopted for the following operation :
A) Turning B) Thread cutting C) Tapper turning D)
iv) Twist drills are usually made of
A) HSS B) Diamond C) Carbides D)
b. List the four elements which specify the size of the Lathe.
c. Explain the difference between facing and turning operations.
d. Draw the neat sketch of radial drilling machine and label all its parts.
(04 Marks)
BOdng
None of these
Knurling
MS
(06 Marks)
(04 Marks)
(06 Marks)
2 of 3
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USN
PART ? A
1 a.
r
Choose the correct answers for the following : (04 Marks)
i) `
,
I:The centrifugal forces generated by the earth rotation on the far side results in another
bulge rise on this side of the earth.
A)
,
)Artar tides B) Earth quakes C) Volcanoes
ii) The condition of steam in the boiler is always,
A) Dry B) Wet
iii) Super heatei.1kused,
A) Inside tile:I:Oiler drum
C) In the path offhe gases to increase volume;of steam
13) To increase ternperature of steam above saturation temperature. LA
Babcock and Wilcox boiler is iv) :: '\: .
,
boiler. ? k? i
A) Fire tube Et) Water tube : ' ?,
u
` C) Air tube D) Fioxi tube
,
b. With the help of a temperature ? enthalpy diagram, explain the mechanism of its formation
of steam. (10 Marks)
c. Name any five boiler mounting and accessories and state their functions. (06 Marks)
C) Saturate4
B) TO :convert wet steam into dry steam
s.
D) Superheated
D) None of these
-,?.
(04 Marks)
B) In moving blades
D) ifilioth fixed and moving blades.
B) An impulse turbine, outward flow
D) Low head, axial flow.
First/Second Semester B.E. Degree Examination, June / July 2014
Elements of Mechanical Engineering
Time: 3 hrs. Max. Marks:100
Note: 1. Answer any FIVE full questions, choosing at least two from each part.
2. Answer all objective type questions only on OMR sheet page 5 of the answer booklet
3. Answer to objective type questions on sheets other than OMR will not be valued.
4. Use of steam tables is not permitted.
, ?
?
Important Note
2 a. Choose the correct answers for the following :A'
i) In reaction turbine, the,pressure drops,
A) In nozzles
C) In fixed blades
Kaplan turbine is,
A) A highhead mixed flow turbine
C) A reaction turbine, outward flow
iii) DelaVallurbine is a
A)=IMPulse turbine B) Reaction turbine
. C) Velocity compounded turbine D) Pressure compounded turbine.
iv) In a gas turbine, if the working substance is continously recirculated, then it is called
as,
A) Open cycle gas turbine B) Closed cycle gas turbine
C) Mixed flow gas turbine D) None of these
Differentiate between open cycle and closed cycle gas turbine with neat sketches.
c. Sketch and explain the working of a Kaplan turbine.
3 a. Choose the correct answers for the following :
i) In a 4 stroke CI engine during suction stroke,
A) Only air is sucked B) Only diesel is sucked
C) Both air and diesel are sucked D) Either air or diesel is sucked
ii) The inner diameter of engine cylinder is called as,
A) Stroke B) Clearance C) Bore D) Pitch
i)
(08 Marks)
(08 Marks)
(04 Marks)
1 of 3
10EME14/24
4 a. Choose the correct answerS:for,the following
i) The boiling point of aMMOnia is,
A) 100?C B) L 33.3?C C) 33.3?C D) 0?C
?..
n
ii) Most commonly used refrigerant i vapour absorption refrigeration system is,
C) SO2 D) NH
3
b.
c.
D) All of the above
What are the desirable properties of refrigerant? (06 Marks)
vapour With a neat sketch, explain the construction and working of vapour absorption refrigeration
system. (10 Marks)
A) Freon B) CO2,-
iii) Throttle value is used in refrigerator to,
A) Compress refrigerant
;
.B) Expand the refrigerant
C) Absorb the heat frOinthe refrigerant
-
':;11:3) Condense the refrigerant
iv) An ideal refrigerant Stiuld have,
A) Low viscosity..'' B) Low freezing point
C) Low boiling point
(04 Marks)
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10EME14/24
b.
c.
Q. NO. 3 (a) contd...
iii) In a diesel engine the fuel is ignited by,
A) Spark
B) Ignitor
C) Heat resulting from compressing air that is supplied for combustion
D) Combustion
iv) Piston speed is equal to,
A) Stroke * rpm B) 2*stroke*rpm C) 48 stroke*rpm D)
(stroke*rpm)
With, the neat sketch, explain the working of 4 stroke diesel engine. (08 Marks)
The following observations were obtained during a trial on a four stroke diesel engine:
Cylinder diameter = 25 cm; Stroke of the piston = 40.44 `-
Crank shaft,Speed = 250 rpm; Brake load = 70 kg -:',,,]
,
Brake drum diameter = 2 m; Mean effective pressure'
4
6 bar
Diesel oil consul:Option = 0.1 m
3
/min; CV = 43900 kJ/kg"
- .
s
,
Specific gravity of diesel = 0.78
Find : (i) BP - ,- (ii) IP (iii) F (iv) wee (08 Marks)
PART ? B
5 a. Choose the correct answers for the following :
i) The process of enlarging an already drilled hole is
A) Spot facing B) Reaming C) Tapping D)
ii) is the process of generating internal threads
A) Tapping B) Turning C) Knurling D)
iii) The slowest speed in Lathe is adopted for the following operation :
A) Turning B) Thread cutting C) Tapper turning D)
iv) Twist drills are usually made of
A) HSS B) Diamond C) Carbides D)
b. List the four elements which specify the size of the Lathe.
c. Explain the difference between facing and turning operations.
d. Draw the neat sketch of radial drilling machine and label all its parts.
(04 Marks)
BOdng
None of these
Knurling
MS
(06 Marks)
(04 Marks)
(06 Marks)
2 of 3
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6 a. Choose the correct answers for the following :
i) The cutting tool in a milling machine is mounted on
A) Tool holder B) Arbor C) Column
b.
c.
d.
(04 Marks)
D) Table
ii) is the one of the abrasive material used in grinding machine.
A) Aluminum chloride B) Calcium chloride
C) Silcon carbide D) Tungsten carbide
iii) The thickness of chip is maximum at the beginning of the cut and minimum at the end
of the cut, cut in each case of
A) Up milling B) Down milling C) Straddle milling D) None of these
One of the milling operation used to produce dovetail groove is
Slot milling B) Straddle milling
End milling D) Angular milling
Differe#tiale between Up milling and Down milling. (04 Marks)
With a neat explain the working of a vertical milling machine. (06 Marks)
With suitabl etches, explain the operation of centreless gr*Iiiig machine. (06 Marks)
Spelter
7 a. Choose the correektpswers for the following :
i) The hard filler Material used in brazing
A) Solder )3) Flux
ii) Support provided foi.
,
t6tating shaft is
A) Bearing B) ;L
u
bricant t) Axle
(04 Marks)
D) Electrode
D) Hook
iii) Carburizing flame has
A) One Zone B) TWo,20ne C) Three Zone D) No Zone
iv) In arc welding the electrode w_I*11 melt along with the work pieces and fill the Joint is
called as
A) Consumable electrode '-. B) Non consumable electrode
C) Both (a) and (b) j:D) None of these
Sketch and explain electriCatc welding process. (06 Marks)
With a neat sketch, explain the different types of flames used in gas welding and specify
their application.
d. Explain with a neat sketch, the method of splash lubricatio.
??
8 a. Choose therpOrrect answers for the following :
i) For
.
cediverting rotary motion into rectilinear motion type of gear u
,A) Spur gear B) Rack and pinion C) Spiral gear
ii) The ratio of diameter of driver and driven pulley is called
A) module B) Pitch circle dia
C) Ratio of tension D) Velocity ratio.
iii) The gear used to connect perpendicular axle shaft is
A) Helical gear B) Spur gear C) Bevel gear
iv) The ratio of pitch circle diameter to number of teeth is
A) Pitch B) Circular pitch C) Module
List five advantages of gear drives over belt drives.
c. Define slip and creep with respect to belt drives.
d. Write the different types of gear trains with their applications.
b.
c.
(04 Marks)
(06 Marks)
(04 Marks)
sed is
D) Bevel gear
meter`.,
D) Worm gear
D) Addendum
(05 Marks)
(05 Marks)
(06 Marks)
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This post was last modified on 01 January 2020