Answer: Starting of with Chemical Engineering something that they may encounter is a lack of adeptness man puissance. People that are working there are not much adept or having cognizance regarding to chemical industry. Something someone with a Civil engineering might encounter is the quandary of sustainable construction, and amendment construction site safety. To go on , something that Electrical engineering might encounter is a Non technical , Virtually an electrical engineer has to deal with an astronomical range of machines , control panels,instruments. For example you are working with circuit breakers,as anon as you’ll have expertise on any particular type of circuit breaker, there's a transmutation in trend and the CB you are working with is already obsolete. And last but no least , Something someone might encounter while doing Mechanical engineering is there toxic substances because their work environment is susceptible to fires, explosions, structural failures and equipment malfunctions.
Answer:
(a)
( ∃x ∈ Q) ( x > √2)
There exists a rational number x such that x > √2.
( ∀x ∈ Q) ( ( x ≤ √2)
For each rational number x, x ≤ √2.
(b)
(∀x ∈ Q)(x² - 2 ≠ 0).
For all rational numbers x, x² - 2 ≠ 0
( ∃x ∈ Q ) ( x² - 2 = 0 )
There exists a rational number x such that x² - 2 = 0
(c)
(∀x ∈ Z)(x is even or x is odd).
For each integer x, x is even or x is odd.
( ∃x ∈ Z ) (x is odd and x is even)
There exists an integer x such that x is odd and x is even.
(d)
( ∃x ∈ Q) ( √2 < x < √3 )
There exists a rational number x such that √2 < x < √3
(∀x ∈ Q) ( x ≤ √2 or x ≥ √3 )
For all rational numbers x, x ≤ √2 or x ≥ √3.
Answer:
a. Rockwell 3. hardness
b. Instron 2. stress vs strain
c. Charpy 1. impact strength
d. Fatigue 4. Endurance Limit
e. Brinell 3. hardness
f. Izod 1. impact strength
Explanation:
Izod and Charpy are the impact strength testing procedure of a material in which a heavy hammer is attached to an arm is released to impact on the test specimen. In Izod test the specimen with v-notch is held vertical with the notch facing outward while in Charpy test the specimen is supported horizontally with notch facing inward to the impacting hammer.
Instron testing system does universal testing of the material which gradually applies the load recording all the stresses and the corresponding strains until the material fails.
Fatigue is the property of a material due to which it fails under the repeated cyclic loading by the initiation and propagation of cracks. The property of a material resist failure subjected to infinite number of repeated cyclic loads below a certain stress limit.
Rockwell and Brinell are the hardness testing methods. In Rockwell test an intender ball is firstly pressed against the specimen using minor load for a certain time and then a major load is pressed against it for a certain time. After the intender is removed the depth of impression on the surface is measured while in case of Brinell hardness we apply only one load against the intender ball for a certain time and after its removal the radius of impression is measured.
What element is the primary constituent of ferrous alloys?
Answer: Ferrous alloys or metals are metals that consist mostly of iron (Fe). Steel is an iron-based alloy containing typically less than 1% carbon, where iron frequently contains 2% or more carbon.