Correct
Incorrect
✅ The correct answer is option A.
Mechanical Engineering MCQs
When a body is subjected to a direct tensile stress (σ) in one plane, then normal stress on an oblique section of the body inclined at an angle θ to the normal of the section is
σ cos θ
σ cos2 θ
σ sin θ
σ sin2 θ
✅ The correct answer is option B.
Lancashire boiler is a stationary fire tube boiler.
Agree
Disagree
✅ The correct answer is option A.
The mechanism in which two are turning pairs and two are sliding pairs, is called a
double slider crank chain
elliptical trammel
Scotch yoke mechanism
all of these
✅ The correct answer is option D.
The maximum heat loss is a boiler occurs due to
moisture in fuel
dry flue gases
steam formation
unburnt carbon
✅ The correct answer is option B.
In order to grind soft material
coarse grained grinding wheel is used
fine grained grinding wheel is used
medium grained grinding wheel is used
any one of these
✅ The correct answer is option A.
The gradient resistance to a vehicle having a mass of 980 kg moving on an incline of 10° is
1.6694 N
16.694 N
166.94 N
1669.4 N
✅ The correct answer is option D.
A block of mass m1, placed on an inclined smooth plane is connected by a light string passing over a smooth pulley to mass m2, which moves vertically downwards as shown in the below figure. The tension in the string is
m1/m2
m1.g sin α
m1.m2/m1+m2
✅ The correct answer is option D.
In metal machining, the zone where the heat is generated due to friction between the moving chip and the tool face, is called
friction zone
work-tool contact zone
shear zone
none of these
✅ The correct answer is option A.
The diameter of superheated tubes in a locomotive boiler is
13 mm
31 mm
130 mm
230 mm
✅ The correct answer is option C.