Answer / dharmendra maurya

in confined space entry minimum o2 19.5% and maximum o2 22%

Answer / diksha singh

this answer is right

Answer / sbaskar

A minimum of 19% is required.Maximum oxygen present in air is 21% only by volume.

Answer / sundar

oxygen need limit between 19.5-23.5%

Answer / badhehm

above 20

Answer / bhanu

limit the person can carry his work in confined space entry 19 to 21%

could anyone send me model question papers or outline of graduate trainee(chemical engg) post?

0 Answers   NPCIL,

PETROLEUM ENGINEERING - QUESTION 25.1 : Fact 1 : Dry air contains 20.95 % oxygen, 78.09 % nitrogen, 0.93 % argon, 0.039 % carbon dioxide, and small amounts of other gases by volume. Fact 2 : Volume occupied is directly proportional to the number of moles for ideal gases at constant temperature and pressure. Fact 3 : 12.5 moles of pure oxygen is required to completely burn 1 mole of pure octane. Fact 4 : Air-fuel ratio (AFR) is the mass ratio of dry air to fuel present in a combustion process such as in an internal combustion engine or industrial furnace. Fact 5 : Molecular weight of oxygen gas is 31.998 g / mole and molecular weight of nitrogen gas is 28.014 g / mole. (a) Find the molar ratio of nitrogen and oxygen, or (moles of nitrogen) / (moles of oxygen) in dry air, by assuming ideal features of nitrogen and oxygen gases. (b) How many moles of nitrogen are available if dry air is used to completely burn the 1 mole pure octane? (c) Find the mass of fuel of 1 mole of octane with molecular weight of 114.232 g / mole. (d) Find the mass of dry air with 12.5 moles of pure oxygen by assuming only oxygen and nitrogen gases exist in the air. (e) Find the air-fuel ratio (AFR) when octane is used as fuel. (f) Find the fuel-air ratio (FAR) when octane is used as fuel.

1 Answers  

What is the Import Procurement Cycle ? and what are the customization steps in SAP ?

0 Answers   Siemens,

Hi, few days back i attended an interview. Currently my employment status is contract basis and interviewer didn't ask me abt mode of employment and he is thinking that am permanent employee in this organization and during the time of joining how I would avoid this problem.

1 Answers  

any meter avilable for measureing the Transformer Losses. ( like Voltmeter for voltage & ammiter for currenr )if yes plz give the make & supplier address, Email, Phone number.

0 Answers   Piramal Healthcare,

After conducting an internet search for ways to reduce energy costs, I found a recipe for whitewashing that is said to reflect sunlight. The recipe calls for 20 pounds hydrated lime to 5 gallons water to 1-quart polyvinyl acetate. What is a good source of polyvinyl acetate that I can buy at a local store?

0 Answers  

What would happen if the suction pressure is low in a boiler feed water pump?

7 Answers   CPCL, Kelvin Power Station,

what is defferance between tubular & automotive plate battery

0 Answers  

ELECTRICAL TECHNOLOGY - EXAMPLE 16.1 : According to Shockley equation, the I - V characteristic of a diode is approximated by I = IS [ exp (nVD / VT) - 1 ]. For silicon, let the reverse bias saturation current IS as 0.000000000001. If n is ideality factor with value of 1.5, VT as thermal voltage drop of 0.026 V at room temperature, what is the value of current I that passes through the silicon diode in the heater of evaporator when the forward voltage drop VD = 0.026 V? Please take note that exp is the exponential function with e(1) = 2.718, e(2) = 7.389.

1 Answers  

What are the some common causes of control valve noise?

0 Answers  

Question 54 - There are 2 alternatives of investment. Choice 1 : A trader offers you an investment opportunity where your investment of A$15000 presently will be A$18000 after 4 years. Choice 2 : A bank offers you 5 % annual return for your initial investment of A$15000. Question a : What is the equivalent bank payment after 4 years? Question b : By using the concept of equivalence in engineering economy, which is the better choice, betwen 1 and 2, that will be more profitable after 4 years?

1 Answers  

What are the specialized crushing methods?

0 Answers