Related Questions

Which among the following is used to dilute oxygen in the gas cylinders used by divers ?
A Krypton
B Argon
C Helium
D Neon
The correct relation between theoretical oxygen demand (TOD), Biochemical oxygen demand (BOD) and Chemical oxygen demand (COD) is given by
A TOD > BOD > COD
B TOD > COD > BOD
C BOD > COD > TOD
D COD > BOD > TOD
একটি অক্সিজেন সিলিন্ডারের আয়তন 10 x 105 cm3 এবং এতে 300 বায়ুমন্ডলীয় চাপে অক্সিজেন ভর্তি আছে। কিছুটা ব্যবহারের পর দেখা গেল যে, চাপ 200 বায়ুমন্ডলীয় চাপে নেমে গেছে। ব্যবহারকৃত অক্সিজেনের আয়তন কত?(The volume of an oxygen cylinder is 10 x 105 cm3 and pressure is 300 atm. After some use, the pressure drops to 200 atm. What is the volume of the used oxygen?)
A 1000 L
B 500 L
C 2000 L
D 1200 L
E 1500 L
In designing thick cylinders, the equation used is
A Lame's equation
B Birnie's equation
C Clavarinos' equation
D All of these
This is an angled surface used on cylinders to make them easier to handle:
A Fillet
B Taper
C Chamfer
D Lug
One molecule of oxygen consists of __________ atoms of oxygen.
A 2
B 4
C 8
D 16
The relative stability of a sewage sample, whose dissolved oxygen is same as the total oxygen required to satisfy BOD, is
A 1
B 100
C Infinite
D Zero
Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.
A -83
B -183
C -196
D -218
The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the
A Bacterial stability factor
B Relative stability
C Biological oxygen demand (BOD)
D Oxygen ion concentration
As the number of cylinders on multi cylinder engines increases the power to weight ratio
A Decreases
B Remains the same
C Increases
D Becomes zero

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