soft materials
tough materials
ductile materials
all of these
✅ The correct answer is option D.
Engineering MCQs
The efficiency of an impulse turbine is maximum when (where Vb = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle)
Vb = 0.5 V cos α
Vb = V cos α
Vb = 0.5 V2 cos α
Vb = V2 cosα
✅ The correct answer is option A.
For hardening alloy steels and high speed steels, they are heated to
500 to 600°C
700 to 900°C
1100 to 1300°C
1300 to 1500°C
✅ The correct answer is option C.
Diesel cycle consists of __________ processes.
two constant volume and two isentropic
two constant pressure and two isentropic
two constant volume and two isothermal
one constant pressure,
✅ The correct answer is option D.
The high steam and low water safety valve is not used in
Cochran boiler
Cornish boiler
Lancashire boiler
Locomotive boiler
✅ The correct answer is option D.
If the section modulus of a beam is increased, the bending stress in the beam will
not change
increase
decrease
✅ The correct answer is option C.
If the temperature of intake air in internal combustion engine increases, then its efficiency will
remain same
decrease
increase
✅ The correct answer is option B.
Lancashire boiler has __________ internal flue tubes.
one
two
three
four
✅ The correct answer is option B.
The ductility of a material __________ with the increase in percentage reduction in area of a specimen under tensile test.
increases
decreases
remains same
✅ The correct answer is option A.
The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by
✅ The correct answer is option C.