Related Questions

In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where M = molecular weight of the gas)
A $$\frac{1}{{\sqrt {\text{M}} }}$$
B $$\sqrt {\text{M}} $$
C $$\frac{1}{{\text{M}}}$$
D M
The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be
A 0.4
B 0.56
C 0.67
D 1.67
The molecular velocity of a real gas is proportional to (where, T = absolute temperature of the gas).
A $$\sqrt {\text{T}} $$
B T
C T2
D $$\frac{1}{{\sqrt {\text{T}} }}$$
If the absolute temperature of an ideal gas is tripled and simultaneously the pressure is reduced to one third; then the volume of gas will
A Remain unaltered
B Increase nine fold
C Increase three fold
D Decrease three fold
Isentropic nozzle flow states about the movement of a gas or fluid through a narrow surface without an increase or decrease in-
A Pressure
B Energy
C Displacement
D Entropy
For a perfect gas, according to Boyle’s law (where p = Absolute pressure, v = Volume and T = Absolute temperature)
A $$\frac{{\text{v}}}{{\text{T}}}$$ = constant, if p is kept constant
B pv = constant, if T is kept constant
C $$\frac{{\text{T}}}{{\text{p}}}$$ = constant, if v is kept constant
D $$\frac{{\text{p}}}{{\text{T}}}$$ = constant, if v is kept constant
The degree of reaction of an axial flow turbine is the ratio of isentropic temperature drop in a blade row to the
A Adiabatic temperature drop in the stage
B Total temperature drop
C Total temperature drop in the stage
D Total adiabatic temperature drop
The temperature in isentropic flow
A Does not depend on Mach number
B Depends on Mach number only
C Cannot drop and then increase again downstream
D None of these
দুটি এক-পরমাণুক আদর্শ গ্যাস পরস্পরের সাথে তাপীয় সাম্যাবস্থায় আছে। A গ্যাস m ভরের অণু দ্বারা গঠিত, এবং B গ্যাস 4m ভরের অণু দ্বারা গঠিত। A গ্যাসের আয়তন ৪ গ্যাসের আয়তনের দ্বিগুণ। এদের চাপের অনুপাত PA / PB কত? (Two monoatomic ideal gases are in thermal equilibrium with each other. Gas A is composed of molecules with mass m while gas B is composed of molecules with mass 4m. The volume of gas A is twice that of gas B. What it the ratio of their pressures PA / PB ?)
A 1/4
B 1/2
C 1
D 2
STP-তে একটি আদর্শ গ্যাসকে প্রথমে তার প্রাথমিক আয়তনের এক-তৃতীয়াংশে সংকুচিত করা হয়, এবং তারপর প্রসারিত হতে দেওয়া হয় যতক্ষণ না তার চাপ প্রাথমিক চাপের অর্ধেক হয়। উভয় প্রক্রিয়ায় গ্যাসের তাপমাত্রা স্থির থাকে। যদি গ্যাসের প্রাথমিক অভ্যন্তরীণ শক্তি । হয়ে থাকে তাহলে এর চূড়ান্ত অভ্যন্তরীণ শক্তি কত? (An ideal gas at STP is first compressed to one-third of its initial volume and then allowed to expand until its pressure is half the initial pressure. The temperature of the gas remains constant during both the processes. If the initial internal energy of the gas is U, what is its final internal energy?)
A U/3
B U/2
C U
D 2U/3

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