Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 4th Sem New 2140403 Principles Of Process Engineering I Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? IV (New) EXAMINATION ? WINTER 2019
Subject Code: 2140403 Date: 14/12/2019
Subject Name: Principles of Process Engineering-I
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 Short Questions 14
1 What is Conduction? 01
2 What do you mean by heat transfer? 01
3 Write the units of thermal conductivity 01
4 Write value of Stefan-Boltzmann Constant with proper units. 01
5 What is monochromatic Emissivity? 01
6 Define: opaque body and white body 02
7 State Kirchhoff?s Law of Heat Radiation. 01
8 What is pump? 01
9 Value of coefficient of discharge for venturi meter is 01
10 Define: a) Ideal Fluid b) Real Fluid c) Bingham Plastic fluid d) inviscid
fluid
Irrotational Flow e) Reynolds Stress.
04
Q.2 (a) Differentiate between Natural Convection and Forced Convection with suitable
examples.
03
(b) Derive the expression for critical radius of insulation in case of cylinder. 04
(c) Calculate the critical radius of insulation for asbestos with k=0.17 W/m
2
K
surrounding a pipe and exposed to room air at 20
o
C with h=3 W/m
2
K. Calculate
the heat loss from a 200
o
C, 50 mm diameter pipe when covered with the critical
radius of insulation and without insulation. Would any fiber glass insulation having
a thermal conductivity of 0.04 W/m.K cause decrease in heat transfer?
07
OR
(c) Explain Fourier?s law for heat conduction in detail. Also apply it for the case of
plane wall and composite wall with neat sketches.
07
Q.3 (a) Write note on double pipe heat exchanger with neat diagram. 03
(b) Explain advantages and disadvantages of single pass and multi pass heat
exchangers.
04
(c) Derive equation for LMTD in case of heat exchanger. 07
OR
Q.3 (a) Give the detailed classification of fluids. 03
(b) Discuss in brief the three modes of Heat transfer. 04
(c) Explain principle of hydrostatic equilibrium and derive expression for it.
07
Q.4 (a) Explain concept of black body in brief. 03
(b) Explain different types of flow pattern in heat exchanger. 04
(c)
Derive Bernoulli?s equation with appropriate assumptions and write it for pump.
07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? IV (New) EXAMINATION ? WINTER 2019
Subject Code: 2140403 Date: 14/12/2019
Subject Name: Principles of Process Engineering-I
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 Short Questions 14
1 What is Conduction? 01
2 What do you mean by heat transfer? 01
3 Write the units of thermal conductivity 01
4 Write value of Stefan-Boltzmann Constant with proper units. 01
5 What is monochromatic Emissivity? 01
6 Define: opaque body and white body 02
7 State Kirchhoff?s Law of Heat Radiation. 01
8 What is pump? 01
9 Value of coefficient of discharge for venturi meter is 01
10 Define: a) Ideal Fluid b) Real Fluid c) Bingham Plastic fluid d) inviscid
fluid
Irrotational Flow e) Reynolds Stress.
04
Q.2 (a) Differentiate between Natural Convection and Forced Convection with suitable
examples.
03
(b) Derive the expression for critical radius of insulation in case of cylinder. 04
(c) Calculate the critical radius of insulation for asbestos with k=0.17 W/m
2
K
surrounding a pipe and exposed to room air at 20
o
C with h=3 W/m
2
K. Calculate
the heat loss from a 200
o
C, 50 mm diameter pipe when covered with the critical
radius of insulation and without insulation. Would any fiber glass insulation having
a thermal conductivity of 0.04 W/m.K cause decrease in heat transfer?
07
OR
(c) Explain Fourier?s law for heat conduction in detail. Also apply it for the case of
plane wall and composite wall with neat sketches.
07
Q.3 (a) Write note on double pipe heat exchanger with neat diagram. 03
(b) Explain advantages and disadvantages of single pass and multi pass heat
exchangers.
04
(c) Derive equation for LMTD in case of heat exchanger. 07
OR
Q.3 (a) Give the detailed classification of fluids. 03
(b) Discuss in brief the three modes of Heat transfer. 04
(c) Explain principle of hydrostatic equilibrium and derive expression for it.
07
Q.4 (a) Explain concept of black body in brief. 03
(b) Explain different types of flow pattern in heat exchanger. 04
(c)
Derive Bernoulli?s equation with appropriate assumptions and write it for pump.
07
2
OR
Q.4 (a) Explain wave theory of radiation. 03
(b) Explain friction factor and show that f = 16/NRe for laminar flow. 04
(c) Derive Hagen-Poiseuille equation for pressure drop and give its applications.
07
Q.5 (a) Give the detailed classification of pumps. 03
(b) Explain cavitations in pump. 04
(c) Calculate the power to pump a liquid at the rate of 1.5 kg/s from a ground level tank
at atmospheric pressure through a 50mm ID steel pipe to an overhead tank 3m
above at 2 kg/cm2 pressure. The distance between two tanks is 500m. Efficiency
of the pump is 70%. The density and viscosity of the liquid is 1500kg/m3 and 20 cp
respectively. Friction factor f =16/NRe
07
OR
Q.5 (a) Explain concept of drag force 03
(b) Explain concept of fluidization and give types of fluidization. 04
(c) Explain construction and working of venturi meter and also derive flow equation
for the same with neat sketch.
07
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This post was last modified on 20 February 2020