⚙️Mechanical Engineering MCQs
Mechanical Engineering MCQs
488 MCQs71
The alloy used for making electrical resistances and heating elements is____________________?
Anichrome
Binvar
Cmagnin
Delinvar E. peiminvar
72
Gun metal contains__________________?
A70% copper and 30% zinc
B90% copper and 10% tin
C85-92% copper and rest tin with little lead and nickel
D70-78% copper and rest tin E. 85-92% copper and rest zinc
73
Bronze contains_____________________?
A70% copper and 30% zinc
B90% copper and 10% tin
C85-92% copper and rest tin with little lead and nickel
D70-75% copper and rest tin E. 90% copper and 10% zinc
74
Structural steel contains following principal alloying elements__________________?
Anickel, chromium and manganese
Btungsten, molybdenum and phosphorous
Clead, tin, aluminium
Dzinc, sulphur, and chromium E. none of the above
75
Which of the following is used for bearing liner_______________?
Agun metal
Bbronze
Cbell metal
Dbabbit metal E. brass
76
If a refractory contains high content of silicon, it means refractory is__________________?
Aacidic
Bbasic
Cneutral
Dbrittle E. none of the above
77
Corrundum contains more than 95% _____________________?
Asteel
BA1203
CSi02
DMgO E. german silver
78
Ductile cast iron___________________?
Acontains 1.7 to 3.5% carbon in free state and is obtained by the slow cooling of molten cast iron
Bis also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable
Cis produced by annealing process. It is soft, tough and easily machined metal
Dis produced by small additions of magnesium (or creium) in the ladle. Graphite is in nodular or spheroidal form and is well dispersed throughout the material E. none of the above
79
Neutral solution is one which has pH value__________________?
Agreater than 7
Bless than 7
Cequal to 7
DpH value has nothing to do with neutral solution E. none of the above
80
The correct composition of Babbit metal is__________________?
A87.75% Sn, 4% Cu, 8% Sb, 0.25% Bi
B90% Sn, 2% Cu, 4% Sb, 2% Bi, 2% Mg
C87% Sn, 4% Cu, 8% Sb, 1% Al
D82% Sn, 4% Cu, 8% Sb, 3% Al, 3% Mg E. none of the above