two times
same
half
✅ The correct answer is option A.
Mechanical Engineering MCQs
For a perfect incompressible liquid, flowing in a continuous stream, the total energy of a particle remains the same, while the particle moves from one point to another. This statement is called
continuity equation
Bernoulli’s equation
Pascal’s law
Archimede’s principle
✅ The correct answer is option B.
The polygon law of forces states that if a number of forces, acting simultaneously on a particle, be represented in magnitude and direction by the sides a polygon taken in order, then their resultant is represented in magnitude and direction by the closing side of the polygon, taken in opposite direction.
Correct
Incorrect
✅ The correct answer is option A.
Relation between cp and cv is given by (where cp = Specific heat at constant pressure, cv = Specific heat at constant volume, γ = cp/cv, known as adiabatic index, and R = Gas constant)
cp – cv = R
Both (B) and (C)
✅ The correct answer is option D.
An elastic bar is fixed at the upper end and loaded at the lower end by a falling weight. The shock load produced can be reduced by
increasing the length of bar
decreasing the cross-sectional area of the bar
decreasing the modulus of elasticity of the bar
all of the above
✅ The correct answer is option D.
Most thermostatic expansion valves are set for a superheat of
5°C
10°C
15°C
20°C
✅ The correct answer is option A.
According to Indian standards, a bolt thread of 6 mm size of coarse pitch and with allowance on the threads and normal tolerance grade is designated as
M6
M8
M6 – 8d
M8 – 6d
✅ The correct answer is option C.
Locomotive boiler is a
single tube, horizontal, internally fired and stationary boiler
single tube, vertical, externally fired and stationary boiler
multitubular, horizontal, internally fired and mobile boiler
multitubular, horizont
✅ The correct answer is option C.
If an incompressible liquid is continuously flowing through a pipe, the quantity of liquid passing per second is different at different sections.
TRUE
FALSE
✅ The correct answer is option B.
The human body feels comfortable when the heat stored in the body is
positive
negative
zero
none of these
✅ The correct answer is option C.