A. carbon
B. sulphur
C. silicon
D. manganese
E. phosphorous
Related Mcqs:
- In nodular iron, graphite is in the form of_____________________?
A. cementite
B. free carbon
C. flakes
D. spheroids
E. nodular aggregates of graphite - The following element can’t impart high strength at elevated temperature__________________?
A. manganese
B. magnesium
C. nickel
D. silicon
E. none of the above - Elinvar, an alloy used in precision instruments, hair springs for watches, etc. contains the following element as principal alloying element__________________?
A. iron
B. copper
C. aluminium
D. zinc
E. nickel - The presence of sulphur in pig iron makes__________________?
A. it easily machinable
B. it brittle
C. it hard
D. the casting unsound
E. increases the fluidity - Presence of moisture in fuel oil would____________________?
A. keep the burner tips cool
B. aid in proper combustion
C. cause sputtering, possibly extinguish¬ing flame
D. clean the nozzles
E. reduce flame length - Heating value of fuel used is as on fired basis. If it is reported for dry or moisture free fuel, then latter should be multiplied by the following factor to correct for as fired value ___________________?
A. (1- moisture content)
B. (1 + moisture content)
C. 1 + moisture content
D. 1 – moisture content - Free cutting steels_____________________?
A. are used where ease in machining is the criterion
B. contain carbon in free form
C. require least cutting force
D. do not exist
E. can be cut freely even under adverse conditions - Free air is the air at________________?
A. atmospheric conditions at any specific location
B. 20°C and 1 kg/cm2 and relative humidity of 36%
C. 0°C and standard atmospheric conditions
D. 15°C and 1 kg/cm2
E. 25°C, 1 kg/cm2 and relative humidity of 50%. - In a free vortex motion, the radial component of velocity everywhere is________________?
A. maximum
B. minimum
C. zero
D. non-zero and finite
E. unpredictable - Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the_________________?
A. force of adhesion
B. force of cohesion
C. force of friction
D. force of diffusion
E. none of die above
