Shaft/rotor speed is most accurately measured by a_________________?
(A) Frequency counter
(B) Tachometer
(C) Strobometer
(D) Speedometer
Factor of safety is the ratio of the ___________________ stress to the working stress?
(A) Tensile
(B) Compressive
(C) Yield
(D) Bearing
The escape velocity of a body on earth which is independent of its mass is about ______________________ km/second?
(A) 3
(B) 7
(C) 11
(D) 15
Magnetic permeability of iron is increased by its_____________________?
(A) Decarburising
(B) Alloying with cobalt
(C) Purification
(D) Alternate heating & cooling
The main reducing agent in iron blast furnace is____________________?
(A) Carbon dioxide
(B) Carbon monoxide
(C) Oxygen
(D) Air
Broaching tools are usually made of____________________?
(A) Cermets
(B) High speed steel
(C) Tungsten carbide
(D) Stellite
Temper brittleness of a material can be fairly detected by the ________________ test ?
(A) Fatigue
(B) Notched bar impact
(C) Tensile
(D) Hardness
There are one octahedral void and ______________ tetrahedral void in the closest packing of atoms ?
(A) One
(B) Two
(C) Three
(D) None of these
Which of the following is the most suitable material of construction for the condenser tubes, where the cooling medium is brine (salty water) ?
(A) Aluminium
(B) Copper
(C) Titanium
(D) Stainless steel
Addition of small amount of ________________ to grey cast iron is done to produce nodular grey cast iron ?
(A) Manganese
(B) Phosphorous
(C) Magnesium
(D) Chromium