4421. The heat and work are mutually convertible. This statement is called __________ law of thermodynamics.
Zeroth
First
Second
✅ The correct answer is option B.
Mechanical Engineering
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4422. The bending moment at the ends of a simply supported beam will be zero.
Yes
No
✅ The correct answer is option A.
4423. Two shafts A and B are made of the same material. The diameter of shaft A is twice as that of shaft B. The power transmitted by the shaft A will be __________ of shaft B.
twice
four times
eight times
sixteen times
✅ The correct answer is option C.
4424. A Porter governor is a
pendulum type governor
dead weight governor
spring loaded governor
inertia governor
✅ The correct answer is option B.
4425. The thermostatic expansion valve operates on the changes in the
degree of superheat at exit from the evaporator
temperature of the evaporator
pressure in the evaporator
none of the above
✅ The correct answer is option A.
4426. The assumption, generally, made in the theory of simple bending is that
the beam material is perfectly homogenous and isotropic
the beam material is stressed within its elastic limit
the plane sections before bending remain plane after bending
all of the above
✅ The correct answer is option D.
4427. A hydraulic ram is a device used to
store the energy of water
increase the pressure of water
to lift water from deep wells
to lift small quantity
✅ The correct answer is option D.
4428. Varingon’s theorem of moments states that if a number of coplaner forces acting on a particle are in equilibrium, then
their algebraic sum is zero
their lines of action are at equal distances
the algebraic sum of their moments about any point in their plane is zero
the algebraic sum of t
✅ The correct answer is option D.
4429. The dry bulb temperature during sensible heating of air
remains constant
increases
decreases
✅ The correct answer is option B.
4430. A grey body is one whose absorptivity does not vary with temperature and wave length of the incident ray.
TRUE
FALSE
✅ The correct answer is option A.