H/3
H/2
2H/3
3H/4
✅ The correct answer is option C.
Mechanical Engineering MCQs
A hacksaw blade is specified by its
length
material
width
number of teeth
✅ The correct answer is option A.
Reynolds number is the ratio of
energy transferred by convection to that by conduction
kinematic viscosity to thermal diffusivity
inertia force to viscous force
none of the above
✅ The correct answer is option C.
A turbine is required to develop 1500 kW at 300 r.p.m. under a head of 150 m. Which of the following turbine should be used ?
Pelton wheel with one nozzle
Pelton wheel with two or more nozzles
Kaplan turbine
Francis turbine
✅ The correct answer is option A.
In continuous chip cutting, the maximum heat is taken by the cutting tool.
Yes
No
✅ The correct answer is option B.
The process extensively used for making bolts and nuts is
hot piercing
extrusion
cold peening
cold heading
✅ The correct answer is option D.
When a rectangular beam is loaded longitudinally, the shear force develops on the top layer.
Agree
Disagree
✅ The correct answer is option B.
In a petrol engine, the mixture has the lowest pressure at the
beginning of suction stroke
end of suction stroke
end of compression stroke
none of these
✅ The correct answer is option B.
The blade of a power saw is made of
boron steel
high speed steel
stainless steel
malleable cast iron
✅ The correct answer is option B.
The relative efficiency is defined as the
ratio of thermal efficiency to Rankine efficiency
ratio of brake power to the indicated power
ratio of heat equivalent to indicated power to the energy supplied in steam
product of thermal eff
✅ The correct answer is option A.