Related Questions

By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. The saving in case of a double acting reciprocating pump is
A 39.2%
B 48.8%
C 84.8%
D 88.4%
By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. This saving in case of a single acting reciprocating pump is
A 39.2%
B 48.8%
C 84.8%
D 88.4%
For hardening alloy steels and high speed steels, they are heated to
A 1100 to 1300°C
B 1300 to 1500°C
C 500 to 600°C
D 700 to 900°C
Which of the following alloy steels is the most suitable for making gun barrels and projectiles?
A Tungsten steel
B Molybdenum steel
C Nickel-chrome steel
D Cobalt steel
Zinat's father contributes to his daughter's saving by giving he 10% of her total saving. If zinat saves Tk. 100 in june , Tk. 250 in july and TK. 130 in August , how much will she have in savings in tk. at the end of that time. ?
A 528
B 524
C 539
D 480
A saving account earns 4%. If the saver is in a 28% tax bracker. The after tax rate of return on saving would be___percent.
A 28.0
B 16.72
C 2.88
'Killed steels' are those steels
A Which are destroyed by burning
B Which after their destruction are recycled to produce fresh steel
C Which are deoxidized in the ladle with silicon and aluminium
D In which carbon is completely burnt
Steels with high carbon equivalent have poor weldability, because in these steels during welding
A Carbon and other alloying elements get oxidised from the weld pool
B Excessive ferrite forms in the heat affected zone leading to poor toughness of the weld
C Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld
D Segregation of carbon and other element occurs in the weld pool leading to poor properties of the weld
Ferric stainless steels compared to austenitic stainless steels
A Have lower corrosion resistance
B Are harder to fabricate
C Are less ductile and hence less suitable for cold pressing
D All of the above
The alloy used for making electrical resistances and heating elements is
A Nichrome
B Invar
C Magnin
D Elinvar

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