Agree
Disagree
✅ The correct answer is option A.
Mechanical Engineering MCQs
The metacentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is
4.1 s
5.2 s
10.4 s
14.1 s
✅ The correct answer is option C.
The power transmitted by means of a belt depends upon
velocity of the belt
tension under which the belt is placed on the pulleys
arc of contact between the belt and the smaller pulley
all of the above
✅ The correct answer is option D.
The shock resistance of steel is increased by adding
nickel
chromium
nickel and chromium
cobalt and molybedenum
✅ The correct answer is option C.
An open structure of a grinding wheel is used for
soft materials
tough materials
ductile materials
all of these
✅ The correct answer is option D.
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.