A. Ultraviolet radiation
B. High atmospheric temperature
C. High ambient temperature
D. Damp atmosphere
✅ The correct answer is option A.
Engineering MCQs
L.D. converters are generally lined with
A. Magnesite
B. Fireclay
C. Chrome magnesite
D. Silica
✅ The correct answer is option C.
Sudden immersion/dipping of red hot steel bar in water makes it
A. Malleable & tough
B. Ductile & soft
C. Brittle & hard
D. None of these
✅ The correct answer is option C.
All modes of heat transfer i.e., conduction, convection & radiation occur in case of the
A. Condensation of steam in a partial condenser
B. Boiler furnace
C. Insulated pipe car raying high pressure steam
D. None of these
✅ The correct answer is option B.
The type of water filter normally employed/ preferred for treating small quantities of water in railway stations and individual industries is the __________ filter.
A. Rapid sand
B. Pressure
C. Gravity
D. Slow sand
✅ The correct answer is option B.
Pressure gauges are never connected directly to the live steam line; rather a loop or syphon is interposed as close as possible to the pressure gauge. This is done to
A. Avoid the overheating of the tubes & bellows which operate them to minimise error and damage
B. Form a seal of water by steam condensate to fill the tube or bellows at the pressure being measured
C. Both ‘a’ & ‘b’
D. Avoid the static head error introduced by steam entry
✅ The correct answer is option C.
Phosphorous is added to copper melt to
A. Remove hydrogen
B. Deoxidise the metal
C. Improve fluidity
D. Reduce shrinkage
✅ The correct answer is option A.
Fatigue life is expected to increase by
A. Increasing the size of the sample
B. Smooth polishing of the surface of the sample
C. Having compressive residual stresses at the surface
D. Having tensile residual stresses at the surface
✅ The correct answer is option C.
All radiations falling on a black body are
A. Refracted
B. Reflected
C. Transmitted
D. Absorbed
✅ The correct answer is option D.
Which of the following performance characteristics of a S.I engine is not affected by the front end volatility of the petrol used?
A. Vapour locking
B. Hot starting
C. Spark plug fouling
D. All of the above
✅ The correct answer is option C.