0
because our teacher(Dr. tauseef Ahmad Qureshi (YaKa) told us he is a great personality he cant be wrong
YaKa = young and knowledge Authority
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
Why 28 days test required for mcb testing why not 30 days?
The standard for testing of Miniature Circuit Breakers - IEC 60898 has arbitrarily decided on 28 days during which the temperature rise is to be measured. The standard states: "The circuit-breaker is in the closed position, the current being established and interrupted by an auxiliary switch. During this test the circuit-breaker shall not trip. During the last period of current flow the temperature-rise of the terminals shall be measured." If the characteristic can be verified for 28 days, the MCB passes the test. Hence 28 days, and not 30 days.
What is the international unit of resister?
Resistance is measured in Ohms.Resistance is measured in Ohms.Resistance is measured in Ohms.Resistance is measured in Ohms.
Voltage is measured with?
Voltage is measured with a voltmeter.
What is a fixed resistor measured in?
Resistance is measured in ohms.
What is measured in amperes a current voltage or an Resistance?
Electrical current is measured in amperes.
Why does chlorine increased the numbers of COD and BOD in the wastewater?
No, not increasing because it is not reducing oxygen.But it can alter the measured BOD and COD rather unpredictable possibly by decreasing BOD and in- or de-creasing COD
What are the differences between seeded and unseeded BOD?
When diluted water is added in surface wastewater to take immediate BOD is called unseeded and after 5 days of period wastewater received saturated oxygen from diluted water is called now seeded BOD.
What is the difference between BOD and COD?
1. COD or Chemical Oxygen Demand is the total measurement of all chemicals in the water that can be oxidized BOD- Biochemical Oxygen Demand is supposed to measure the amount of food (or organic carbons) that bacteria can oxidize. 2. COD is usually measured and the test is simple and easy to perform with the right equipment and can be done in 2 hours. BOD usually takes 5 days 3. Permissible limit of COD =250 to 500 ppm Permissible limit for BOD = 30 mg/L
What is the duration in days for BOD test for water analysis at 20 degree c?
It is usually of five days but it may either be 3 days depending upon the the BOD test.
Why cod is greater than bod?
Type your answer here... It's not. Typically, COD is greater than BOD. The COD test is used primarily as an operational control because it takes only a matter of hours, compared to 5 days for the BOD test.
How are DO and BOD content measured?
Dissolved oxygen is measured by the Winkler titration method.BOD5 is measured by putting a known volume of bacteria in a sample of the fluid to be insppected at the saturation point of oxygen, keeping it at a specified temperature for 5 fays then measuring the oxygen content.Both procedures are found in the "Standard Methods for the Examination of Water and Wastewater"
How many days does it take to gain 5 pounds?
weight is measured by calories, not time.
What are the release dates for 5 Minute Work Out Anywhere - 2013 Brew Up a Hot Bod - 1.10?
5 Minute Work Out Anywhere - 2013 Brew Up a Hot Bod - 1.10 was released on: USA:8 July 2013
When was Bod - series - created?
Bod - series - was created in 1975.
When did Bod - series - end?
Bod - series - ended in 1984.
What is BOD and COD of spent wash?
COD=100 What is Bod
What are the release dates for 5 Minute Work Out Anywhere - 2013 Brew Up a Hot Bod 1-10?
5 Minute Work Out Anywhere - 2013 Brew Up a Hot Bod 1-10 was released on: USA: 8 July 2013
