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DALHOUSIE UNIVERSITY
Faculty of Engineering
NAME:
GRADE
STUDENT ID
ENGI 2102
Thermo-fluid Engineering I
Instructors: Drs. Michael Pegg, P.Eng. and Jan Haelssig
Wednesday 16 November 2011
17:30-19:30
Sexton Memorial Gym
TEST No. 2: Version B
This i

ENGI 2102: Thermo-Fluid Engineering I
Fall 2015
Assignment 4
Due: Tuesday, October 13th, 2015 by 12 noon
Bring your assignment to the lecture or my office (D403) before 12 noon
Problem 1
[3 marks]
A linear spring will follow Hookes law (F = kx) where F is

ENGI 2102: Thermo-Fluid Engineering I
Fall 2014
Assignment 10 SOLUTIONS
Problem 1
[6 marks]
[Chapter 10, Problem 1]
Applying the Bernoulli equation between point 1 and the liquid surface of the reservoir (point 2),
P2 P
1
g z 2 z1
W p
1
2
2u2 1u12 F
0

ENGI 2102: Thermo-Fluid Engineering I
Fall 2014
Assignment 8 SOLUTIONS
Problem 1
[4 marks]
Liquid water
0.025 m3/min
10C
Hot Reservoir, Taverage = 30C
Liquid water
0.025 m3/min
50C
QH
Heat Pump
W
QL
Cold Reservoir, TL = 0C
a) At an average temperature of

ENGI 2102: Thermo-Fluid Engineering I
Fall 2014
Assignment 9 SOLUTIONS
Problem 1
[12 marks]
a) From the diagram,
h1 h2 440 kJ/kg
h3 1440 kJ/kg
h4s 1820 kJ/kg
b) The energy balance around the evaporator is,
mice cream h fusion mNH 3 h3 h2
mNH 3
mice crea

ENGI 2102: Thermo-Fluid Engineering I
Fall 2014
Assignment 6 SOLUTIONS
Problem 1
a)
Chapter 5, Problem 8
[9 marks]
We know that the system is heated until the
volume doubles. Therefore, the pressure must
reach the required 200 kPa to move the piston.
The

ENGI 2102: Thermo-Fluid Engineering I
Fall 2014
Assignment 7 SOLUTIONS
Problem 1
[3 marks]
Applying the Bernoulli equation between point 1 and the free surface in the reservoir (point 2),
P2 P1
g z 2 z1
1 2
u 2 u12 0
2
Simplifying,
P1
gh
1 2
u1 0
2

ENGI 2102: Thermo-Fluid Engineering I
Fall 2015
Assignment 5
Due: Thursday, October 22nd, 2015 by 2 pm
Bring your assignment to the lecture or lab F106 between 1 and 2 pm
Problem 1
[4 marks]
A piston-cylinder device contains a fixed amount of air initiall

ENGI 2102: Thermo-Fluid Engineering I
Fall 2015
Assignment 7
Due: Tuesday, November 3rd, 2015 by 12 noon
Bring your assignment to the lecture or office D403 before 12 noon
Problem 1
[4 marks]
[Chapter 5, Problem 5]
A rigid tank contains 1 kg of air at 300

ENGI 2102: Thermo-Fluid Engineering I
Fall 2015
Assignment 6
Due: Friday, October 30th, 2015 by 2 pm
Bring your assignment to Thursdays lecture, office D403,
or lab F106 on Friday between 1 and 2 pm
Problem 1
[10 marks]
Consider the following cyclic proce

ENGI 2102: Thermo-Fluid Engineering I
Fall 2015
Assignment 8
Due: Friday, November 20th, 2015 by 1:30 pm
Bring your assignment to Thursdays lecture or office F105B Friday before 1:30 pm
Problem 1
[6 marks]
In the system shown in the diagram, 10 kg/s of ai

ENGI 2102: Thermo-Fluid Engineering I
Fall 2015
Assignment 9
Due: Tuesday, December 1st, 2015 by 2:30 pm
Bring your assignment to Tuesdays lecture or office F105B before 2:30 pm
Problem 1
[7 marks]
A piston/cylinder device contains 3 kg of air initially a

The importance of interdisciplinary involvement by the health care team is central to effective patient
care which patient and family both.
Inadequate communication among the interdisciplinary team can lead to disagreements and an inability
to collaborate

Ten Steps to a Successful Summary
1. Begin by identifying the author and title of the reading.
2. In your first sentence or short paragraph, re-state the complete thesis (controlling idea and
supporting reasons).
3. Include all significant points (ideas)

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ENGI 2102: Thermo-Fluid Engineering I
Fall 2014
Assignment 5 SOLUTIONS
Problem 1
[5 marks]
R = 0.2968 kJ kg-1 K-1
Tcr = 126.200 K
Table B.1, for nitrogen:
a) v
Pcr = 3.400 MPa = 3400 kPa
1
0.0086957 m 3 /kg
3
115 kg/m
T
b) Pr
Pv
R
kJ
kg kPa m3
146.

ENGI 2102: Thermo-Fluid Engineering I
Fall 2014
Assignment 4 SOLUTIONS
Problem 1
[4 marks]
n1 = 1500 rpm
Ri = 21.1 mm
Ro = 21.8 mm
L = 10.0 cm
n2 = 400 rpm
a) The torque on the bob is caused by shear stress in the fluid. Assuming that the shear stress on

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PART I SHORT-ANSWER QUESTIONS
Answer the following questions in the space provided.
Problem 1 [6 marks total]
a) A lidless cup of hot water cools on the counter by transferring heat to the surroundings. [2 marks]
i) Is this a closed, open or isolated syst