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Centrifugal compressors compared to reciprocating compressors
A Require less space
B Have quieter operation
C Have lower operating costs
D All of the above
Inter-cooling in multistage compressors is done
A To cool the air during compression
B To cool the air at delivery
C To enable compression in two stages
D To minimize the work of compression
The gypsys are a tribe of strange people. They do not have any fixed home but wander about from place to place and live in tents. they were originally natives of India. But as they reached England from Egypt ,the English took them from Egyptians. this is why they came to be called gypsys. they were beloved to possess strange powers. they could tell your fortune by reading the palm of your hand. it was thought they stole little children to train them in their way of life. whenever a child got lost it was thought that it has been carried away by gypsys so they were arrested and sent for trial. but this attitude towards the Gypsy has gradually changed.The gypsies are people who ---
A have a settled way of life
B came originally from Egypt to England
C are always on the move
D steal children to train them in the way of life
The motor used for the compressors is
A d.c. series motor
B shaded pole motor
C capacitor-start capacitor-run motor
D reluctance motor
Rotary compressors are used for delivering
A Small quantities of air at high pressures
B Large quantities of air at high pressures
C Small quantities of air at low pressures
D Large quantities of air at low pressures
Multistage centrifugal pumps are used to
A Give high discharge
B Produce high heads
C Pump viscous fluids
D All of these
Multistage centrifugal pumps are used to obtain
A High discharge
B High head
C Pumping of viscous fluids
D High head and high discharge
Multistage catalytic converter is not used in the
A Conversion of SO2 to SO3
B NH3 synthesis reaction
C Both A & B
D Neither A nor B
Multistage centrifugal pumps are generally used for
A High head
B Low head but high discharge
C Highly viscous liquid
D Slurries of high solid concentration
Rotary compressors are suitable for
A Large discharge at high pressure
B Low discharge at high pressure
C Large discharge at low pressure
D Low discharge at low pressure

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