Engineering :: Machine Design

@ : Home > Mechanical Engineering > Machine Design

291.

Which steel will have maximum percentage of carbon?

A.	C 14	B.	15 Cr 65
C.	20 Cr 18 Ni 2	D.	40 Cr 40
E.	C 15

292.

A steel that has been deoxidized with a strong de-oxidizing agent, such as Silicon or Aluminium in order to eliminate a reaction between C and O2 during solidification, is known as

A.	Oxidised steel	B.	De-oxidised steel
C.	Kolled steel	D.	Soft steel
E.	Anodised steel

293.

A steel specified as St 50 will have a tensile strength of approximately

A.	50 tonnes/m2	B.	50 kg/mm2
C.	50 kg/cm2	D.	50 tonnes/mm2
E.	None of the above

294.

Which oil has highest specific gravity?

A.	Petroleum	B.	Turpentine
C.	Sperm	D.	Castor
E.	Cotton Seed

295.

Stone erusher rolls are generally made

A.	Mild steel	B.	High carbon steel
C.	Cast iron	D.	Grey iron
E.	Cast steel

296.

Which of the following has highest strength to weight ratio?

A.	Steel piano wire	B.	Alloy steel, heat treated
C.	Brass	D.	Aluminium, hard rolled
E.	Stainless steel

297.

Which of the following is not a standard ball diameter for Brinell hardness testing?

A.	1 mm	B.	2 mm
C.	5 mm	D.	10 mm
E.	25 mm

298.

Which of the following material is not suitable for impact loads?

A.	High carbon steel	B.	Manganese steel
C.	Cast iron	D.	Mild steel
E.	Chrome steel

299.

In case of steels, as the percentage of carbon content increases

A.	Tensile strength increases	B.	Elongation increases
C.	Hardness decreases	D.	Weldability increases

300.

The property which refers to the relative ease with which a material can be cut is known as

A.	Machinability	B.	Malleability
C.	Stiffness	D.	Softness