Related Questions

The most efficient method of compressing air is to compress it
A Isothermally
B Adiabatically
C Isentropically
D Isochronically
The work done in isothermal compression compared to that in adiabatic compression will be
A Less
B More
C Same
D More or less depending upon the extent of work done
একটি স্প্রিংকে (স্প্রিং ধ্রুবক- 980 Nm-1) 10 cm সঙ্কুচিত করে এর সাহায্যে 200 g ভরের একটি বলকে লম্বভাবে উপরে ছোড়া হলো। বলটি উপরের দিকে কত উচ্চতায় উঠবে? (A 200 g ball is thrown vertically upward by compressing a spring (spring constant: 980 Nm-¹) by 10 cm. What will be the height reached by the ball?)
A 0.25 m
B 2.5 m
C 25.5 m
D 51 m
Multistage compression of air as compared to single stage compression offers the advantage of
A Power saving per unit weight of air delivered
B Moisture elimination in the inter-stage cooler
C Increased volumetric efficiency
D All of the above
In case of compression of one kg of air, the work done will be the least, when the value of polytropic index 'n' is
A 1
B 1.4
C 1.5
D $$\gamma = \frac{{{{\text{C}}_{\text{p}}}}}{{{{\text{C}}_{\text{v}}}}}$$
The work done per unit mass of air in compression will be least when 'n' is equal to
A 1
B 1.2
C 1.3
D 1.4
In a reciprocating air compressor, the compression work per kg of air
A Increases as clearance volume increases
B Decreases as clearance volume increases
C Is independent of clearance volume
D Increases as clearance volume decreases
For minimum work in multistage compression, assuming same index of compression in all stages
A Work done in first stage should be more
B Work done in subsequent stages should increase
C Work done in subsequent stages should decrease
D Work done in all stages should be equal
A can do a piece of work in 10 days. While B alone can do it in 15 days. They work together for 5 days and the rest of the work is done by C in 2 days. If they get Tk 450 for the whole work, how much money C should get from the whole?
A Tk 150
B Tk. 75
C Tk. 225
D Tk. 200
When the temperature of air leaving the inter-cooler, in a two stage compression with inter-cooler, is ________ the original atmospheric air temperature, then the intercooling is known as perfect or complete intercooling.
A Equal to
B Less than
C More than
D None of these

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