5021. The rate of discharge through the nozzle __________ when the exit pressure is gradually reduced.
remains same
decreases
increases
✅ The correct answer is option C.
Mechanical Engineering
Prepare with the best Mechanical Engineering MCQs with answers and explanations for exams, interviews, and job tests. Our collection covers core topics such as engineering mechanics, thermodynamics, strength of materials, theory of machines, fluid mechanics, heat transfer, manufacturing processes, machine design, and power plant engineering. These Mechanical Engineering multiple-choice questions are designed for students, fresh graduates, and professionals preparing for NTS, PPSC, FPSC, PEC exams, GATE, university entry tests, and recruitment assessments. Strengthen your technical knowledge and problem-solving ability with our updated and comprehensive Mechanical Engineering MCQs.
5022. If the value of n = 0 in the equation pvn = C, then the process is called
constant volume process
adiabatic process
constant pressure process
isothermal process
✅ The correct answer is option C.
5023. The temperature of oxy-hydrogen flame is __________ oxy-acetylene flame.
same as
less than
more than
✅ The correct answer is option B.
5024. Which of the following statement is correct ?
A fire tube boiler occupies less space than a water tube boiler, for a given power.
Steam at a high pressure and in large quantities can be produced with a simple vertical boiler.
A simple vertical boiler has one fire tube.
all of the above
✅ The correct answer is option C.
5025. In order to balance the reciprocating masses,
primary forces and couples must be balanced
secondary forces and couples must be balanced
both (a) and (b)
none of these
✅ The correct answer is option C.
5026. The static friction
[A]. bears a constant ratio to the normal reaction between the two surfaces
[B]. is independent of the area of contact, between the two surfaces
[C]. always acts in a direction, opposite to that in which the body tends to move
[D]. all of the above
✅ The correct answer is option D.
5027. The coefficient of viscosity may be determined by
[A]. capillary tube method
[B]. orifice type viscometer
[C]. rotating cylinder method
[D]. all of these
✅ The correct answer is option D.
5028. A draught produced by a chimney due to the difference of densities between the hot gases inside the chimney and cold atmospheric air outside it, is called natural draught.
[A]. Yes
[B]. No
null
null
✅ The correct answer is option A.
5029. The effect of having excess camber is
[A]. excessive steering alignment torque
[B]. hard steering
[C]. too much traction
[D]. uneven tyre wear
✅ The correct answer is option D.
5030. In order to prevent crushing of masonry at the base of the dam, the maximum stress should be __________ the permissible stress of the soil.
[A]. equal to
[B]. less than
[C]. more than
null
✅ The correct answer is option B.