Question is ⇒ Axial flow compressor resembles, Options are ⇒ (A) centrifugal pump, (B) reciprocating pump, (C) turbine, (D) sliding vane compressor, (E) none of the above., Leave your comments or Download question paper.

Question is ⇒ Axial flow compressor resembles, Options are ⇒ (A) centrifugal pump, (B) reciprocating pump, (C) turbine, (D) sliding vane compressor, (E) none of the above., Leave your comments or Download question paper. Previous question Next question


Q1.	Axial flow compressor resembles
A.	centrifugal pump [Wrong Answer]
B.	reciprocating pump [Wrong Answer]
C.	turbine [Correct Answer]
D.	sliding vane compressor [Wrong Answer]
E.	none of the above. [Wrong Answer]
View Answer 9 -3 Explanation:- Answer : C 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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⇒ 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

⇒ Mining industry usually employs following motive power
A.C. electric motor
compressed air
petrol engine
diesel engine

⇒ Reciprocating air compressor is best suited for
large quantity of air at high pressure
small quantity of air at high pressure
small quantity of air at low pressure
large quantity of air at low pressure

⇒ The volumetric efficiency of a compressor falls roughly as follows for every 5°C increase in atmospheric temperature
0.1%
0.5%
1%
5%

⇒ 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

⇒ 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

⇒ Ratio of indicated h.p. to shaft h.p. in known as
compressor efficiency
isothermal efficiency
volumetric efficiency
mechanical efficiency

⇒ The maximum combustion pressure in gas turbine as compared to I.C. engine is
more
less
same
depends on other factors

⇒ Gas turbine works on
Brayton or Atkinson cycle
Carnot cycle
Rankine cycle
Erricsson cycle

⇒ The ratio of isentropic work to Euler work is known as
pressure coefficient
work coefficient
polytropic reaction
slip factor

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

⇒ To avoid moisture troubles, the branch connections from compressed air lines should be taken from
top side of main
bottom side of main
left side of main
right side of main

⇒ 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

⇒ 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

⇒ To aviod moisture troubles, the compressed air main line should
rise gradually towards the point of use
drop gradually towards the point of use
be laid vertically
be laid exactly horizontally

⇒ More than one stage will be preferred for reciprocating compressor if the delivery pressure is more than
2 kg/cm2
6 kg/cm2
10 kg/cm2
14.7 kg/cm2

⇒ A centrifugal compressor works on the principle of
conversion of pressure energy into kinetic energy
conversion of kinetic energy into pres¬sure energy
centripetal action
generating pressure directly

⇒ Rotary compressor is best suited for
large quantity of air at high pressure
small quantity of air at high pressure
small quantity of air at low pressure
large quantity of air at low pressure

⇒ The ideal efficiency of simple gas turbine cycle depends on
pressure ratio
maximum cycle temperature
minimum cycle temperature
all of the above

⇒ Losses in a centrifugal compressor are due to
inlet losses
impeller channel losses
diffuser losses
all of the above

⇒ 1 m of air at atmospheric condition weighs approximately
0.5 kg
1.0 kg
1.3 kg
2.2 kg

⇒ The material commonly used for air craft gas turbine is
stainless steel
high alloy' steel
duralumin
Timken, Haste and Colonel alloys

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

⇒ The overall isothermal eiffciency of compressor is defined as the ratio of
isothermal h.p. to the BHP of motor
isothermal h.p. to adiabatic h.p.
power to drive compressor to isothermal h.p.
work to compress air isothermally to work for actual compression

⇒ Water is injected in gas turbine cycle to
control temperature
control output of turbine
control fire hazards
increase efficiency

⇒ Volumetric efficiency of a compressor without clearance volume
increases with increase in compression ratio
decreases with increase in compression ratio
is not dependent upon compressin ratio
may increase/decrease depending on compressor capacity

⇒ Isothermal compression efficiency can be attained by running the compressor
at very high speed
at very slow speed
at average speed
at zero speed

⇒ Volumetric efficiency of a compressor with clearance volume
increases with increase in compression ratio
decreases with increase in compression ratio
in not dependent upon compression ratio
may increase/decrease depending on compressor capacity

⇒ Axial flow compressor resembles
centrifugal pump
reciprocating pump
turbine
sliding vane compressor