Heat and Mass Transfer: Fundamentals and Applications
5th Edition
ISBN: 9780073398181
Author: Yunus A. Cengel Dr., Afshin J. Ghajar
Publisher: McGraw-Hill Education
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Please identify the marked points of the stress-strain curve (Write on graph next to
corresponding letter)
Stress, σ
A
D (slope of line)
B.
C
Strain, &
r
Q2.
A bracket is attached to a vertical column by means of six identical bolts
as shown in Fig. 1. It is subjected to an eccentric force of P-80 kN at a distance of
200 mm from the center of column. What is the magnitude of maximum shear force
and which bolt carry it?
P= 80 kN
200
Fig. 1
1
2-
75
6
30
75
→ 5
.5
1- 50 10-50-1
3. The attachment shown in the Fig.2 is made of 1040 HR. The static force is 30 kN.
Specify the weldment (give the pattern, electrode number, type of weld, length of
weld, and leg size).
30 kN
Fig. 2
500
All dimension
in mm
100
(15 marks)
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- ฉันต้องการหา อุณหภูมิสุดท้ายของกระบวนการนี้และงานของกระบวนการนี้มีค่าเท่าใดarrow_forwardThe pressure and temperature at the beginning of compression of a cold air-standard Diesel cycle are 100 kPa and 300 K , respectively. At the end of the heat addition, the divssure is 7.2 MPa and the temperature is 2050 K . Assume constant specific heats evaluated at 300 K . Determine:(a) the compression ratio.(b) the cutoff ratio.(c) the percent thermal efficiency of the cycle.(d) the mean effective pressure, in kPa .arrow_forwardQ3. Determine the reaction force at A and force P applied at 45° to the horizontal just necessary to start a roller 100 cm diameter over an obstruction 25 cm high, if the roller weighs 1000 N, as shown in Fig. 3. Fig. (3)arrow_forward
- Correct Answer is written below(preferably handwritten solution) . Detailed and complete fbd only please. I will upvote, thank you.arrow_forwardThe pressure and temperature at the beginning of compression of a cold air-standard Diesel cycle are 100 kPa and 300 K , respectively. At the end of the heat addition, the pressure is 7.2 MPa and the temperature is 2050 K . Assume constant specific heats evaluated at 300 K . Determine:(a) the compression ratio.(b) the cutoff ratio.(c) the percent thermal efficiency of the cycle.(d) the mean effective pressure, in kPaarrow_forwardCorrect Answer is written below(preferably handwritten solution) . Detailed and complete fbd only please. I will upvote, thank you.arrow_forward
- Correct Answer is written below(preferably handwritten solution) . Detailed and complete fbd only please. I will upvote, thank you. 7: The round bar AB in the figure is formed into a quartercircular arc of radius R that lies in the horizontal plane. The bar is built in atB and carries the vertical force P at end A. Given: P = 3 kN, R = 900 mm andα = 25°.1. Calculate the bending moment (kN-m) acting at section C.2. Calculate the torsional moment (kN-m) acting at section C.3. If the allowable torsional stress is limited to 65 MPa, calculate therequired minimum diameter of the bar (mm).ANSWERS: 1.14 kN-m; 0.25 kN-m; 60 mmarrow_forwardCorrect Answer is written below(preferably handwritten solution) . Detailed and complete fbd only please. I will upvote, thank you.arrow_forwardCurrent Attempt in Progress A cold air-standard Otto cycle has a compression ratio of 9 and the temperature and pressure at the beginning of the compression process are 520°R and 14.2 lbf/in.², respectively. The heat addition per unit mass of air is 600 Btu/lb. Assume constant specific heats evaluted at 520°R. Determine: (a) the maximum temperature, in °R. (b) the maximum pressure, in lbf/in.² (c) the percent thermal efficiency. (d) the mean effective pressure, in lbf/in.²arrow_forward
- Correct Answer is written below(preferably handwritten solution) . Detailed and complete fbd only please. I will upvote, thank you.arrow_forwardCorrect answer and complete detailed fbd only. I will upvote. : The two steel shafts, each with one end builtinto a rigid support, have flanges attached to their freeends. The flanges are to be bolted together. However,initially there is a 6⁰ mismatch in the location of the boltholes as shown in the figure. Determine the maximumshear stress(ksi) in each shaft after the flanges have beenbolted together. The shear modulus of elasticity for steelis 12 x 106 psi. Neglect deformations of the bolts and theflanges.arrow_forwardCorrect detailed answer and complete fbd only. I will upvote. The compound shaft, composed of steel,aluminum, and bronze segments, carries the two torquesshown in the figure. If TC = 250 lb-ft, determine the maximumshear stress developed in each material (in ksi). The moduliof rigidity for steel, aluminum, and bronze are 12 x 106 psi, 4x 106 psi, and 6 x 106 psi, respectivelyarrow_forward
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