Question is ⇒ Euler's equation is applicable for, Options are ⇒ (A) centrifugal compressor, (B) axial compressor, (C) pumps, (D) all of the above, (E) none of the above., Leave your comments or Download question paper.

Question is ⇒ Euler's equation is applicable for, Options are ⇒ (A) centrifugal compressor, (B) axial compressor, (C) pumps, (D) all of the above, (E) none of the above., Leave your comments or Download question paper. Previous question Next question


Q1.	Euler's equation is applicable for
A.	centrifugal compressor [Wrong Answer]
B.	axial compressor [Wrong Answer]
C.	pumps [Wrong Answer]
D.	all of the above [Correct Answer]
E.	none of the above. [Wrong Answer]
View Answer 2 -2 Explanation:- Answer : D Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

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⇒ Inter cooling in compressors
cools the delivered air
results in saving of power in compressing a given volume to given pressure
is the standard practice for big compressors
enables compression in two stages

⇒ The advantage of multistage compression over single stage compression is
lower power consumption per unit of air delivered
higher volumetric efficiency
decreased discharge temperature
moisture free air

⇒ Volumetric efficiency of air compressors is of the order of
20-30%
40-50%
60-70%
70-90%

⇒ An ideal air compressor cycle without clearance on p-v diagram can be represented by following processes
one adiabatic, two isobaric, and one constant volume
two adiabatic and two isobaric
two adiabatic, one isobaric and one constant volume
one adiabatic, one isobaric and two constant volume

⇒ The work done per unit mass of air in compression will'be least when n is equal to
1
1.2 ,
1.3
1.4

⇒ Surging is the phenomenon of
air stream blocking the passage
motion of air at sonic velocity
unsteady, periodic and reversed flow
air stream not able to follow the blade contour

⇒ The volumetric efficiency of compressor with increase in compression ratio will
increase
decrease
remain same
may increase/decrease depending on clearance volume

⇒ Maximum delivery pressure is a rotary air compressor is of the order of
6 kg/cm2
10 kg/cm2
16 kg/cm2
25 kg/cm2

⇒ The thermal efficiency of a simple gas turbine for a given turbine inlet temperature with increase in pressure ratio
increases
decreases
first increases and then decreases
first decreases and then increases

⇒ The ratio of the increase in pressure in rotor blades to total increase in pressure in the stage is called
pressure ratio
pressure coefficient
degree of reaction
slip factor

⇒ As the value of index '«' is decreased, the volumetric efficiency will
increase
decrease
remain unaffected
may increase/decrease depending on compressor clearance

⇒ The ratio of specific weigh/h.p. of gas turbine and I.C engines may be typically of the order of
1 : 1
2 : 1
4 : 1
1:2

⇒ In a compressor, free air delivered is the actual volume delivered at the stated pressure reduced to

intake temperature and pressure conditions
0°C and 1 kg/cm2
20°C and 1 kg/cm2

⇒ Mechanical efficiency of gas turbines as compared to I.C engines is
higher
lower
same
depends on osier considerations

⇒ Standard air is the air at
atmospheric conditions at any specific location
20°C and 1 kg/cm2 and relative humidity 36%
0°C and standard atmospheric conditions
15°C and 1 kg/cm2

⇒ Clearance volume in actual reciprocating compressors is essential
to accommodate Valves in the cylinder head
to provide cushioning effect
to attain high volumetric efficiency
to avoid mechanical bang of piston with cylinder head

⇒ An ideal air compressor cycle with clearance on p-v diagram can be represented by following processes
one adiabatic, two isobaric, and one constant volume
two adiabatic and two isobaric
two adiabatic, one isobaric and one constant volume,
one adiabatic, one isobaric and two constant volume

⇒ The degree of reaction of an axial flow turbine is the ratio of is entropic temperature drop in a blade row to the
adiabatic temperature drop in the stage
total temperature drop
total temperature drop in the stage
total adiabatic temperature drop

⇒ Which is false statement about air receivers
These are used to dampen pulsations ,
These act as reservoir to- take care of sudden demands
These increase compressor efficiency
These knock out some oil and moisture

⇒ The hottest point in a gas turbine is
at the base
at the tip
in the center
between ~ to i of the blade height

⇒ The thermal efficiency of a gas turbine as compared to a diesel plant is
same
more
less
depends on other factors

⇒ The volumetric efficiency of a compressor is calculated on the basis of
volume of air inhaled at working conditions
volume of air inhaled at N.T.P. conditions
volume at 0°C and 1 kg/cm2
volume at 20°C and 1 kg/cm2

⇒ Which is false statement about advantages of multistage compressor in comparison to single stage compressor
less power requirement
better mechanical balance
less loss of air due to leakage past the cylinder
more effective lubrication

⇒ Rotary compressors are suitable for
large discharge at high pressure
low discharge at high pressure
large discharge at low pressure
low discharge at low pressure

⇒ Pick up the correct statement
gas turbine uses low air-fuel ratio to economies on fuel
gas turbine uses high air-fuel ratio to reduce outgoing temperature
gas turbine uses low air-fuel ratio to develop the high thrust required
all of the above

⇒ As the turbine inlet temperature increases, the thermal efficiency of gas turbine for the optimum pressure ratio
increases
decreases
remains same
first increases and then decreases

⇒ Volumetric efficiency is
the ratio of stroke volume to clearance volume
the ratio of the air actually delivered to the amount of piston displacement
reciprocal of compression ratio
index of compressor performance

⇒ Producer gas is produced by
carbonation of coal
passing steam over incandescent coke
passing air and a large amount of steam over waste coal at about 65°C
partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast

⇒ The compressor performance at higher altitude compared to sea level will be
same
higher
lower
dependent on other factors

⇒ The compressor efficiency is the
isothermal H.P/indicated H.R
isothermal H.P./shaft H.R
total output/air input
compression work/motor input