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For the following questions answer them individually
In Kaplan turbine runner, the number of blades is generally of the order _____.
2 - 4
4 - 8
8 - 16
16 - 24
Air vessels in reciprocating pump are used to _____.
smoothen flow
reduce acceleration to minimum
increase pump efficiency
save pump from cavitation
A hydraulic intensifier normally consists of _____.
two cylinders, two rams and a storage device
a cylinder and a ram
two co-axial rams and two cylinders
a cylinder, a piston, storage tank and control valve
Cavitation is caused by _____.
high velocity
high pressure
weak material
low pressure
Which of the following pumps is used for pumping viscous fluids?
centrifugal pump
screw pump
reciprocating pump
jet pump
Steel whose elements are used for the purpose of modifying the mechanical properties of plain carbon steel is called _____.
Alloy steel
Invar
Stainless steel
High speed steel
Alloy steel containing 36% nickel is called _____.
None of these
Carbon steel is _____.
produced by adding carbon in steel
an alloy of iron and carbon with varying quantities of phosphorus and sulphur
purer than the cast iron
Percentage of carbon in steel is _____.
0.1% to 0.8%
0.35% to 0.45%
1.8% to 4.2%
0.1% to 1.5%
Hardness of steel depends on _____.
amount of cementite it contains
amount of carbon it contains
contents of alloying elements
method of manufacture of steel
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