Q3 a) How the hardness of a mild steel specimen is determined using a Brinell hardness testing machine?
Q: Q2. What is 'strength' mean for metal in material selection Strength-Density chart? C. Tear strength…
A: Strength density chart is the chart through which different materials are selected on the basis of…
Q: You find that the ultimate stress of an object is 15%. What does that mean qualitatively?
A: Given : Ultimate stress is 15% To find: What it means qualitatively
Q: Material science Q1. Differentiate between true stress and enginnering stress and show them on…
A: Need to Differentiate between true stress and enginnering stress and show them on curve.
Q: Complete the following comparative table between cold, warm and hot work
A: Forming is the metalworking process of shaping the metal parts and objects through mechanical…
Q: Cal. the permeability number of a sand specimen if it takes 75s to pass 2000 cm3 of air at a…
A: Given: The time taken by sand is T=75 s. The volume of the air is V=2000 cm3. The value of the air…
Q: Answer by true (T) or false (F) for the folling sentences 1... meane shat sha melina d. 3. pve n…
A: Hot working and work hardening features are to be recalled. The effect of hot working on metal…
Q: specimen Yield strength based on actual Yield strength based on 12mm based on actual diameter (MPa)…
A: Note: Dear Student! As per our guidelines, we are only allowed to answer a single question. Kindly…
Q: What does the region of strain hardening cause?
A: The working of the metals below their recrystallisation temperature is known as cold working…
Q: What type of indenter is used in a Rockwell 'C' hardness test? Select one: O a. rhombus shaped O b.…
A: Type of indenter used in a Rockwell 'C' hardness test,
Q: Why would engineers use Vickers Hardness testing (HV) over Brinell Testing for hardened tool steel…
A: Hardness is the property of the material that can be understand as the resistance to scratch and…
Q: Brinell Hardness Test is conducted in __________________________zone. Select one: Shear Tension…
A: In Brinell hardness test, hard, spherical steel ball called as indentor is forced into in to the…
Q: 12. True or false? In Brinell hardness test, the depth of indentation must not be too great relative…
A: Given that True or false? In Brinell hardness test, the depth of indentation must not be too great…
Q: three: Three commonly used tests to measure the hardness related properties of materials are:…
A: Hardness is basically resistance offer by material to plastic deformation.
Q: Q2. What is 'strength’ mean for metal in material selection Strength-Density chart? A. Yield…
A: It is required to choose correct option
Q: The Ultimate strength of the material * is
A: Basics of Stress-strain diagram.
Q: In tensile testing a tensile load is applied to the specimen until it a. bend O b. fractures O c.…
A:
Q: Q1/a Assume a Brinell test uses a 10 mm steel ball and 3000 kg load. If the value of Brinell…
A:
Q: 6.43. The simple expressions for Rockwell hardness num- bers in Table 6.9 involve indentation, 1,…
A: As per our comapany guidelines we are supposed to solve 1 question only., please post the rest as…
Q: The shear strength of a metal is commonly determined in which one of the following tests: Group of…
A: The below table describes the determination of corresponding stress for a corresponding test.…
Q: 1. Explain how Jominy test results can be used to validate a particular steel grade for a specific…
A: Jominy test is used to measure the hardenability of the steel.
Q: What does a tensile test show?
A: Tensile test is destructive test in which multiple mechanical properties are measured. It is called…
Q: Auto fretting method is used to increase strength of the material. Select one: O a. Compressive…
A: Answer is (a) Compressive strength
Q: Metal work: What are possible sources of error in trying to obtain a specific hardness or strength?
A:
Q: 2-1 Figure P2-1 shows stress-strain curves for three failed tensile-test specimens. All are plotted…
A: To study the curves and answer the following questions.
Q: A technician measured the hardness of the steel bar two times. For the first time, he measured the…
A: (a) No, hardness will be changed in both the cases.
Q: Q2. How can we get the toughness of a material from tensile test results?
A: As per the guidelines of Bartleby we are subjected to solve only one question at a time. please…
Q: A typical value for the yield stress of mild steel would be? Select one: O a. 200 GPa O b. 100 MPa O…
A: Option c is correct.
Q: the hardness of
A: Given; During heat treatment of steel, the hardness of various structures in increasing order is,…
Q: One of the inspectors in the quality control department has frequently used the Brinell and Rockwell…
A: If the tests are related to Rockwell and Brinell hardness tests only, then Inspector might be…
Q: In a tensile test, initial length of the experimental specimen is ____________ the final length of…
A: A tensile test applies tensile (pulling) force to a material and measures the specimen's response…
Q: Q4: Answer the following : 1- What are the classifications of engineering materials? 2- What are the…
A: Material science is a branch of engineering that represents the behavior of different materials…
Q: Typically, the shear yield stress is what fraction of the tensile yield stress?
A:
Q: If the Vicker’s hardness number (HVN) is 350 N/mm2, how much load was applied on the test specimen…
A:
Q: a) How is the hardness measured in the "Mohs Hardness Method"?
A: Mohs hardness rough can be measure of the resistance by a smooth surface to scratching expression…
Q: In a tensile test is the maximum stress that developed in a material. Select one:
A: In a tensile test ________ is the maximum stress that developed in a material. Answer: d) Ultimate…
Q: calculate hardness (Brilnell Hardness, HB): Ø Tested material – bronze Ø Force loading the…
A:
Q: How might the hardness value obtained in a Rockwell hardness test be specified? Select one: О а. НК…
A: Option b is correct.
Q: 2-1 Figure P2-1 shows stress-strain curves for three failed tensile-test specimens. All are plotted…
A: To study the graph and answer the following questions.
Q: 1- What is the shape of the effect produced in the Brinell scale hardness test? 2- Where can the…
A: Note: This is a multi-part question. According to Bartleyby's policy, we shall answer only three…
Q: 1. Define ultimate compressive strength. What are are the specific conditions of a compression test…
A: According to our guidelines we are supposed to answer first question only. 1. The compressive…
Q: Toughness is the property of a metal find by test. a. Tensile b. Creep O c. Impact С. d. Hardness
A: Charpy V notch impact test Izod test KIC test These tests measure the toughness of the metal.
Q: If you twist a body, what is produced. (axial or shear stress)
A: Let us assume a shaft of d diameter shaft. Twist is applied to the shaft.
Q: 2-1 Figure P2-1 shows stress-strain curves for three failed tensile-test specimens. All are plotted…
A:
Q: Brinell hardness tester 10 mm diameter steel ball ,3000 kg applied load indicated hardness value of…
A:
Q: What are three commonly used test to measure the hardness related properties of materials?
A: there are so many methods or test to measure hardness of material.
Q: Q_1)Relationship between hardness and yield stress
A: Hardness test :
Q: A tensile specimen had a tensile strength of 67,819 psi. The original gage length was 2 inches.…
A:
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- Q2/ semiconductor at T, has conductivity of 2.5 x 106 s/m. number of electrons of 3x 103 Numbers of holes 3x 103 ,charge of 1.602 x 10 -19 c, and at T2 has conductivity of 3.6 x 10 s/m , number of electrons of 4.5x 1014 , Numbers of holes 2x 102 ,charge of 1.602 x 10-19 c. Calculate the mobility of electrons and holesWhen stress is applied to a liquid over an application time tp the liquid needs a relaxation time tc to accordingly deform. Relaxation time tc is a physical property of liquids. The Deborah number is De= tdt, . The lower the Deborah number of a stress applied to a material the more.. : Select one: O The material behaves like a solid O The material behaves like visco-elastic O The material behaves like a liquidM4.25 (Sl units) What is the resistance R of a length of copper wire whose length 10 m and whose diameter 0.30 mm? Use Table 4.3 of the book for reference. Round to the nearest thousandth of an ohm ()
- Which of the following statements are true? Select one or more: a. Dislocations and defects make thermal transfer easy due to plastic deformation b. Starting at room temperature, the heat conductivity of ceramics goes generally up with increasing temperature c. Starting at room temperature, the heat conductivity of ceramics goes generally down with increasing temperature d. Dislocations and defects make thermal transfer difficult due to phonon scattering e. Heat transfer in solids occurs mainly by waves of atoms vibrating f. Heat transfer in solids occurs mainly by phononsAt room temperature (20°C) the electrical conductivity of Gallium phosphide (GaP) is 63 (2.m)–1, whereas the electron and hole mobility are 0.24 and 0.057 m²/V-s, respectively. a) Compute the intrinsic carrier concentration for GaP at room temperature, (q=1.6 x 10 -19 c). b) If the energy gap of GaP is 0.92 eV, calculate its conductivity at 70°C (k= 8.62 x 10 eV/K). -51. The resistivity of aluminum is 2.8 x 10-8 Nm. How long (in meters) a piece of aluminum wire 1.0 mm diameter is needed to give a resistance of 4.0 0?
- The accepted resistivity value at room temperature for copper wire is 1.7421 x 10-8 ohm meter. please explain why or why not the measurements recorded are within some percent error of thius value. calculate resistivity and show the percent error. Use R=p L/A Using the formula calculate pYou are given a number of 32 Q resistors, each capable of dissipating only 1.8 W without being destroyed. What is the minimum number of such resistors that you need to combine in series or in parallel to make a 32 Q resistance that is capable of dissipating at least 14.0 W? Number i Units(c) Sketch the hysteresis loop of the B-H curve for a ferromagnetic material with proper labels at room temperature. (d) Calculate the electrical conductivity of a 6.0 mm diameter cylindrical silicon specimen of 60 mm long in which a current of 0.5 A passes in an axial direction. A voltage of 12.5 V is measured across two probes that are separated by 40 mm. i. Compute the electrical conductivity of the specimen. ii. Compute the resistance over the entire 60 mm of the specimen using the data in (i).
- Question 5.1: A thermopile is constructed with chromel-alumel materials. Five junctions are maintained at 400-C and five junctions are maintained at 100°C. The output of the thermopile is connected to a potentiometer. Answer the following questions: a) Draw the equivalent circuit and indicate all the given information. b) What is the voltage induced by the potentiometer? Given: Table 8.30 Temperature. °C -150 -100 <-50 <<-25 0 25 50 75 100 150 200 300 400 500 600 800 1000 1200 1500 1750 Thermal emf in absolute millivolts for commonly used thermocouple combinations, according to ITS(90) (Reference junction of 0 C)¹ Copper vs. Constantan (7) -4.648 -3.379 -1.819 -0.940 0 0.992 2.036 3.132 4.279 6.704 9.288 14.862 20.872 Chromel vs. Constantan (E) -7.279 -5.237 -2,787 -1.432 0 1.495 3.048 4.657 6.319 9.789 13.421 21.036 28.946 37.005 45.093 61,017 76.373 Iron vs. Constantan ( -6.500 -4.633 -2.431 -1.239 ( 1.277 2.585 3.918 5.269 8.010 10.779 16.327 21.848 27.393 33.102 45.494 57.953…Can you please tell me which ones are true and which ones are false ? a- Amorphous and semi-crystalline polymers both become brittle at lower temperatures b- Localized heating at high frequencies results in polymer softening causing polymer fatigue c- The elastic modulus of semi-crystalline polymers rises as chain entanglement decreases d-Polymers are similar to metals in that they can also exhibit both ductile and brittle fracture e- Phonons scatter from dislocations in metals, reducing heat transfer efficiency f- The maximum phonon energy is limited by the interatomic lattice spacing g- Phonons arise from excitation of electrons to higher energy levels in an atom h- Increased temperature in many ceramics up to around 1000 °C leads to a decrease in thermal conductivityI need a clear and fast answer within 20 minutes | dybala A radioactive material of 20gm has 12.5 years. Who much gm of the sample will remain after 50years? (1.25 g)