Q.3: (50 marks)
a road prohle runs on three slopes, starts from station a to first part starts from
second part is honzontal starts from (d. g) and the last part starts from g w iode
(44%) as shown in table below,
11 design level at distances (10 m and 45 m) is 3525 and 360 5m respectively
depth of fill at distance 10m is 50 cm depth of cut at distance som om
calculate:
1. reduced level, design level, missed data of all stations
2. depth of cut and fill
3. slope of three parts in the form of (1v: ? h)
station
distance
i. s
fs
b. s
3.0
а
0
b
10
20
26
28
2.3
30
40
50
1.8
12.1
g
1.5
h
60
80
100
2.2
120

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite