Related Questions

In case of non-condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is _________ the condenser pressure.
A Equal to
B Lower than
C Higher than
D None of these
The pressure inside the cylinder is _________ the atmospheric pressure during the exhaust stroke.
A Equal to
B Below
C Above
D None of these
In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.
A Equal to
B Less than
C More than
D None of these
In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is __________ the atmospheric pressure.
A equal to
B below
C above
D middle
The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases,
A Will be higher
B Will be lower
C Will remain unaffected
D May be higher or lower depending upon the nature of non-condensable gases
If air (a non-condensing gas) is present in a condensing vapor stream, it will __________ the condensation rate of vapor.
A Increase
B Decrease
C Not affect
D Increase the condensing film co-efficient as well as
Presence of a non-condensing gas in a condensing vapour
A Increases the rate of condensation
B Decreases thermal resistance
C Is desirable to increase the film co-efficient
D None of these
In Diesel engines, during suction stroke, _________ is drawn in the cylinder.
A Air and fuel
B Only fuel
C Only air
D None of these
In petrol engines, during suction stroke, _________ is drawn in the cylinder
A Air and fuel
B Only fuel
C Only air
D None of these
Atmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called
A Thermosphere
B Stratosphere
C Troposphere
D Mesosphere

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