A. Sulphur
B. Silicon
C. Lead
D. Phosphorous
✅ The correct answer is option B.
Engineering MCQs
The most prominent single cause of corrosion in boilertubes, drums, economisers and steam superheaters in a thermal power plant boiler is the
A. Water alkalinity & leakage
B. Hydrazine addition during feed water treatment
C. Release of non-condensable gas from water in the boiler
D. Scale formation
✅ The correct answer is option C.
Tesla metre per ampere (T. m/A) is the unit for the measurement of
A. Magnetic succeptibility
B. Magnetic moment
C. Permeability of free space
D. Flux density
✅ The correct answer is option C.
Maximum hardenability of steel depends upon its
A. Chemical composition
B. Carbon content
C. Grain size
D. Alloying elements content
✅ The correct answer is option D.
The single most imortant requirement for a turbine blade material is
A. Damping
B. Resilience
C. Creep resistaned
D. DBTT
✅ The correct answer is option C.
Gross national product (GNP) means the total value of __________ in a country.
A. Goods produced
B. Gold reserve
C. Earning of the citizens
D. Taxes paid
✅ The correct answer is option A.
Dephosphorisation of molten pig iron is favoured by
A. Oxidising and basic slag
B. Reducing and basic slag
C. High activity co-efficient of phosphorous in metal
D. Oxidising and neutral slag
✅ The correct answer is option B.
Starting friction is low in case of the __________ lubrication.
A. Boundary
B. Hydrodynamic
C. Hydrostatic
D. Mixed/semi-fluid
✅ The correct answer is option C.
In 18-4-1 high speed steel, 18, 4 & 1 respectively denote the percentage of
A. Chromium, tungsten & vanadium
B. Tungsten, chromium & vanadium
C. Tungsten, vanadium & chromium
D. Tungsten, chromium & molybdenum
✅ The correct answer is option B.
Grinding wheel made of silicon carbide is most suitable for grinding materials of low tensile strength (e.g; tough bronze). Grinding is a __________ operation.
A. Turning
B. Dressing
C. Forming
D. Surface finishing
✅ The correct answer is option D.