Related Questions

The diameters of fire tubes and superheater tubes in locomotive boiler are
A 47.5 mm, 130 mm
B 32.5 mm, 180 mm
C 65.5 mm, 210 mm
D 24.5 mm, 65 mm
A _________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit.
A Blow off cock
B Fusible plug
C Stop valve
D Safety valve
The size of a boiler drum in pulverized fuel fired boiler, as its size and capacity, (steam pressure and flow ratings) increase
A Increases
B Decreases
C Remains unchanged
D Increases/decreases depending on steam temperature requirements
Boiler tube size is specified by its thickness and __________ diameter.
A Outside
B Inside
C Mean
D None of these
The bank of tubes located at the back of the domestic refrigerators are the __________ tubes.
A Refrigerant cooling
B Evaporator
C Condenser
D Throttling
Brass tubes are used in the manufacture of tubes of evaporators used in sugar and salt industries, mainly because of its
A High co-efficient of thermal expansion
B Low thermal conductivity
C High corrosion resistance
D All of the above
In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones ; because the smaller diameter tubes
A Are easier to clean
B Are less prone to fouling
C Can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less
D None of these
The diameter of fire tubes in Cochran boiler is of the order of
A 2 cm
B 6 cm
C 8 cm
D 12 cm
The fire tubes in a Cochran boiler usually have _________ diameter.
A 6.25 mm
B 62.5 mm
C 72.5 mm
D 92.5 mm
The fire tubes in a Locomotive boiler has __________ diameter.
A 4.75 mm
B 5.47 mm
C 7.45 mm
D 47.5 mm

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