3584Chemical EngineeringMedium
Tolerable concentration of toxic carbon monoxide in atmospheric air is about ________ ppm?
A50
B5000
C10000
D1000
Correct answer
A. 50
Explanation
The correct answer is 50.
Correct answer
A. 50
Explanation
The correct answer is 50.
________ glass is used for the manufacture of optical glass?
The temperature at which the second Virial co-efficient of a real gas is zero is called the________?
1 BTU/lb.←°F is equivalent to ________ kcal/kg.°C?
Kopp’s rule is useful for the determination of________?
A head comprises of straight flange section, corner torus, section and central dished section. Crown radius and knuckle radius in a head is related respectively to the________?
Which of the following petrographic constituents of coal is non-coking?