Eman drowing for the seam weld show
from the weldment drawing and
lost all industrial drawings are made using a
process called
projection.
3. the aws welding symbol shows the type of joint
to be welded. the or false
4. list five things that the welding symbol will tell
the welder about the weld to be made.
s. could a weld all-around symbol be used in the
welding symbol for the box shown in exercise
31-1? yes or no? why?
6. what types of information may be shown in the
tail of the welding symbol? name two.
7. sketch the welding symbol for the completed weld
shown below:

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?