ENME 232 / Quiz # 1
Name:_____________________
(Duration: 20 mins, Total Points: 12)
1.
What is an intensive property? Categorize the following into intensive and
extensive properties – mass, pressure, volume, specific volume, total energy,
density. (2 points)
Ans:
An intensive property is one the measure of which is independent of the size of a system.
Intensive Property – pressure, specific volume, density.
Extensive Property – mass, volume, total energy.
2.
The hydraulic lift in a car repair shop has an output diameter of 50 cm, and is to
lift cars upto 5000 kg. Determine the fluid gage pressure that must be maintained
in the reservoir. (2 pts)
Ans:
Pressure = Force/Area = 5000 x 9.81 / (
π
x 0.25
2
)+P
atm
= 2.499 MPa+P
atm
.
P
gage
= P
abs
– P
atm
=
0.2499 MPa.
3.
Determine the state of water for the following conditions. Also find value of
vapor quality if the state is a saturated mixture.
(a) 100 kPa, v = 1.3 m
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This homework help was uploaded on 04/17/2008 for the course ENME 000 taught by Professor Staff during the Spring '08 term at Maryland.
 Spring '08
 staff

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