A. 2
B. 5
C. 10
D. 20
✅ The correct answer is option A.
Engineering MCQs
__________ is the trade name assigned to a non-ferrous cast alloy composed of cobalt, chromium & tungsten.
A. Stellite
B. High speed steel
C. Cermet
D. Alnico
✅ The correct answer is option A.
Thermal conductivity of a material does not depend upon its
A. Mass
B. Volume
C. Surface area
D. All of the above
✅ The correct answer is option D.
Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is
A. 5CaO . 3 Al2O₃
B. 3CaO . Al2O₃
C. 3CaO . SiO₂
D. 2CaO . SiO₂
✅ The correct answer is option A.
__________ cycle is the most efficient thermodynamic cycle.
A. Diesel
B. Otto
C. Rankine
D. Carnot
✅ The correct answer is option D.
If a heat transfer surface is pock-marked with a number of cavities, then as compared to a smooth surface the heat transfer by __________ will not increase.
A. Convection
B. Nucleate boiling
C. Radiation
D. Conduction
✅ The correct answer is option A.
Which of the following absorbs maximum heat in a high pressure boiler ?
A. Economiser
B. Steam superheater
C. Air preheater
D. Furnace water wall
✅ The correct answer is option D.
__________ remains constant during the adiabatic cooling of moist air.
A. Wet bulb temperature
B. Dry bulb temperature
C. Relative humidity
D. Specific humidity
✅ The correct answer is option A.
Multistage compression of air as compared to single stage compression offers the advantage of
A. Power saving per unit weight of air delivered
B. Moisture elimination in the inter-stage cooler
C. Increased volumetric efficiency
D. All of the above
✅ The correct answer is option D.
__________ welding will be the most suitable for butt welding two 20 cms thick boiler drum mild steel plates.
A. Electrical resistance
B. Electroslag
C. Plasma torch
D. Submerged arc
✅ The correct answer is option B.