REFRIGERATION+AIR COND.TECH.-W/2 ACCESS
8th Edition
ISBN: 9781337370042
Author: TOMCZYK
Publisher: CENGAGE L
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Chapter 24, Problem 12RQ
Explain the following terms as they apply to electronic expansion valves:
step motor
offset
error
algorithm
microprocessor
feed back loop
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An element in plane stress is subjected to stresses ☐ x, y, and xx (see figure). Using Mohr's circle:
a) Determine the principal stresses and the maximum in-plane shear stress acting at the point.
b) Show these stresses in an appropriate sketch
12 MPa
27 MPa
T
60 MPa
5 kN-m
A beam with an inverted tee-shaped cross section is subjected to positive bending mo-
ments of M₂ = 5 kN-m. The cross-sectional dimensions of the beam are shown below.
10 mm
Determine:
(a) the centroid location, the
moment of inertia about the
z axis,
40 mm
5 kN-m
K
150 mm
H
15 mm
120 mm
(b) the bending stress at points
H and K.
ans: 17.83mPa
(c) the maximum bending stress
produced in the cross section.
EXAMPLE 6.4
Draw the shear and moment diagrams for the beam shown in Fig. 6-7a.
15 kN
80 kN·m
-5 m
B
-5 m
(a)
5 kN/m
D
Chapter 24 Solutions
REFRIGERATION+AIR COND.TECH.-W/2 ACCESS
Ch. 24 - Which is not a pressure or force acting on a TXV...Ch. 24 - The needle and seat of a TXV are normally made of...Ch. 24 - The TXV tries to maintain a constant _____in...Ch. 24 - The four types of charges that the TXV uses to...Ch. 24 - Prob. 5RQCh. 24 - When do some TXVs require an external an external...Ch. 24 - Draw a diagram showing how an external equalizer...Ch. 24 - The TXV responds to an increased heat load by A....Ch. 24 - The three factors that determine the capacity of a...Ch. 24 - Explain why the entering liquid pressure has no...
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- 2) A short rectangular post supports compressive loads of P- 175 kN and Q-90 kN, as shown in the figure below. A top view of the post showing the locations where loads P and Q are applied to the top of the post is also given. Determine the vertical normal stresses at corners a, b, c, and d of the post. P=175 kN Q=90 kN 160 mm 120 mm b 40 mm 160 mm a x d 60 mm 40 mmarrow_forwardFor the beam shown below: Find the equation for the shear force as function of x, V(x), along the x domains A-B (0 ≤ x ≤ 5 m) and B-C (5 m sxs 10 m), and draw the shear diagram for the beam. For each step, draw the associated free body diagram and indicate the equations of equilibrium used. Upload your answers in PDF. 2.5 m 15 kN 5 kN/m 80 kN·m Upload your D B 5m- ―5 marrow_forwardQ What is Theories of Brittle failure? Q, what do you mean for each of what's Coming? utں وہی رہیں > Tyiled , Puc > Sut, So, KP, Kt, q When to use this law. N= Out Ouc * Ouc 1 -Out (01+0₂) I'm a mechanical engineering student. I don't understand What is the difference ductile materials. between Brittle andarrow_forward
- Q2. (30 Marks) For the following figure: 1. Read the tolerances (GD&T) from the figure? 2. Write the Opitz code (5 digits only) for this product? 3. Write few points about point cloud? And how it can be used to inspect the geometry of products? 4. Draw sketch (free hand) to the top view of the figure below? (()) 5. For the symbol below the figure, what does it means? () will jo الهندسي 08±0.01 A 020±0.01 00.02MAM BM 010±0.01 00.02MAM ماذا يعني هذا Barrow_forwardQ: Find the steady-state response of the system shown in the figure below. Pulley, mass moment of inertia Jo 寻 k2 00000 For the following data: Fo sin of m 00000 uu x(t) w FO JO r m C k2 [Rad/s] [N] kg-m [cm] [Kg] [N.s/m] [N/m] kl [N/m] 28 58 1.8 13 18 540 540 1080arrow_forwardEx. Determine the safety factor for the bracket rod shown below for N = 6 x 107 Cycles. The notch radius at the wall is Y=0.25 cm.. the braket is made from Aluminum 2024, Cold-drawn with σy, 290 MP 441 MPa. L = 10 cm, a = 8 cm, d = 2cm. "Out = d Wall A rod arm a Farrow_forward
- dynamically Ex: A rectangular stepped bar is to be loaded in bending. · Determin the fatigue stress concentration factor for a given dimensions. Out = 324 MPa (steel) M d= 1.8 cm 2 D= 1 cm r= 0.25 cmarrow_forwardEx. Create an estimated S-N diagram for an aluminum bar and define its equation . what is the corrected fatigue strength at N = 2 #10 cycles ? Out = 310 MPa, the forged bar is 3.81 cm in N=2107 round. The load is fully reversed torsion.arrow_forwardand Ex. Create an estimation of S-N diagram for asteel, axially loaded bar and define its equation. How many cycles of life can be expected if the alternating stress is 100 MPa. The bar is 150 min has a hot-rolled finish. The operating temp. is 500 °C. out 600. MPa. The loading will be. pure axial, fully reversed. Square =arrow_forward
- Create an estimation of S-N diagram for asteet, axially loaded bar and define its equation. How many cycles of life can be expected if the alternating stress is 100 MPa. The bar is 150 mm has 9 The loading will be. pure axial, fully reversed. hot-rolled finish. The operating temp. is 500 °C. Out = 600 MPa. Square andarrow_forwardEx. Repeat Ex. in page (24), with fluctuating load as shown below. By = 462 M2, Out = 552 MPa. Find the safety factor (NF) using Modified - Goodman, Gerber, and soderberg criterias F(N) 400 100 timearrow_forwardut Ex. The cantilever beam shown is, made from steel with σ = 552 MPa is subjected to fully reversed load. Neglect shear stress q :10 cycles effect, estimate wheather the beam is safe or not safe at N= los The beam is machined surface and the operating temp. is 100c. D 764 L= 10cm L D= 1.3 Cm d = 1 cm b= 1 cm momend diagram -FLarrow_forward
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