Markersmarkers1

Define the term 'empirical formula' - ANSWERS A formula that gives the simplist whole number ration of atoms of each element in a compound Define the term 'molecular formula' - ANSWERS A way of representing molecules that shows the actual number of atoms of each element in a molecule Define the term 'General formula' - ANSWERS An algebraic formula that can describe any member of a family of compounds Define the term 'Structural formula' - ANSWERS A way of representing molecules ...

Nucleons - ANSWERS Protons and neutrons Electrons (location) - ANSWERS Surrounding the nucleus Relative mass of an electron - ANSWERS 1/1840 Strong nuclear force - ANSWERS The way protons and neutrons are held together in the nucleus Electrostatic forces - ANSWERS The attraction between protons and electrons that hold them together in the atom Atomic Number (Z) - ANSWERS The number of protons in the nucleus Mass number (A) - ANSWERS The total number of protons and neutrons in the nuc...

Absolute temperature - ANSWERS Temperature measured in Kelvin Absolute zero - ANSWERS The lowest possible temperature theoretically achieveable - 273.15 degrees celius or zero Kelvin Acceleration - ANSWERS The stage in mass spectrometry where positive ions are speeded up by an electric field Acid rain - ANSWERS Rain that has been acidified by pollutants such as sulfur dioxide Actual yield - ANSWERS Mass of product obtained in a reaction Addition polymer - ANSWERS Polymer formed when many...

What is the equation linking mass moles and MR? Mass=moles * MR What is the definition of Ar (relative atomic mass)? The average mass of an atom of an element compared to the mass of one twelfth of carbon 12. What does Mr stand for? Relative molecular mass Define relative isotopic mass. The mass of an isotope of an element compared to the mass of one twelfth of the mass of carbon 12 What is the relative mass of an electron? 1/1840 What is an isotope? Isotopes of an element are ato...

API 650 covers material, design, fabrication, erection and testing requirements for aboveground welded steel storage tanks. Internal pressure allowed for these tanks approximates atmospheric pressure. However, the internal pressures mus not exceed what criteria? - ANSWERS The weight f the roof plates (1.1.1) What is the maximum temperature permissible for a 'standard tank' covered by API 650, unless additional requirements of appendix M of API 650 are followed? - ANSWERS 200F (1.1.1)...

The purpose of in-service inspections of AST's is to assure : - ANSWERS continued tank integrity. What type of inspection may be done by owner/ operator personnel and/or authorized inspectors? - ANSWERS Routine in-service inspection The external condition of storage tanks shall be monitored by close visual inspection from the ground on a routine basis.This inspection can be done by owner/operator personnel,and can be done by the other than Authorized Inspector. The interval of such ...

SECTION 1,,2,3 API-653 covers which of the following types of tanks? a) Carbon and low alloy steel tanks built to ASME Section VIII, Div.1 b) Carbon and low alloy steel tanks built to ASME Section X c) Carbon and low alloy steel tanks built to API - 650 and 12C d) Carbon and low alloy steel tanks built to API - 510 - ANSWERS C API-653 provides the requirements for construction of which of the following? a) Process pressure vessels b) Aboveground petroleum storage tanks c) LNG Storage sp...

ALL THE BEST

what is the minimum thickness for a tank floor plate with no means for leak detection or secondary containment if an RBI program is not in place - ANSWERS 0.1 inch reference table 4.4 API 653 when a full hydrostatic test is required, it shall be held for - ANSWERS 24-hours reference 12.3.1 API 653 how many radiographs shall be taken in a square 2 in x 24 in but welded insert play in a 1-inch thick shell - ANSWERS 6 total one horizontal one vertical one in each corner : reference 12.2...

API publications necessarily address problems of what type? - ANSWERS Problems of a general nature. (Special notes section) API Standard 653 covers in service steel tanks built to what standards? - ANSWERS This standard covers steel storage tanks built to API 650 and its predecessor API 12C. (1.1.1) What API Standard always governs for tanks that have been placed in service? - ANSWERS In the case of apparent conflicts between the requirements of this standard and API 650 or its pred...