3091. A device used to empty the boiler whenever required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler, is called blow off cock.
Yes
No
✅ The correct answer is option A.
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.
3092. The sense of coriolis component 2 ωv is same as that of the relative velocity vector v rotated at
45° in the direction of rotation of the link containing the path
45° in the direction opposite to the rotation of the link containing the path
90° in the direction of rotation of the link containing the path
180° in the direction
✅ The correct answer is option C.
3093. A fast and loose pulley drive is used when
shafts are arranged parallel and rotate in the opposite directions
shafts are arranged parallel and rotate in the same directions
shafts are arranged at right angles and rotate in one definite direction
driven shaft is to be
✅ The correct answer is option D.
3094. According to Clavarino’s equation, the thickness of a cylinder is equal to (where d = Inner diameter of cylinder, p = Internal pressure, and μ = Poisson’s ratio. )
none of these
✅ The correct answer is option A.
3095. Which of the following is the correct statement of the second law of thermodynamics?
It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work.
It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source.
There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy.
all of the above
✅ The correct answer is option D.
3096. The equivalent evaporation is defined as
the ratio of heat actually used in producing the steam to the heat liberated in the furnace
the amount of water evaporated or steam produced in kg per kg of fuel burnt
the amount of water evaporated from and at 100° C into dry and saturated steam
the evaporation of 15.
✅ The correct answer is option C.
3097. In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve is by increasing the angle of advance of the eccentric while the throw of the eccentric, steam lap and exhaust lap are kept constant. This method will
cause withdrawing or throttling of steam
reduce length of effective stroke of piston
reduce maximum opening of port to steam
all of these
✅ The correct answer is option B.
3098. The function of antilock brake system (ABS) is that is
reduces the stopping distance
minimises the brake fade
maintains directional control during braking by preventing the wheels from locking
prevents nose dives du
✅ The correct answer is option C.
3099. According to Indian standard specifications, a grey cast iron designated by ‘FG 200’ means that the
carbon content is 2%
maximum compressive strength is 200 N/mm2
minimum tensile strength is 200 N/mm2
maximum shear strength
✅ The correct answer is option C.
3100. Which of the following statement is correct regarding petrol engines?
A fine fuel spray mixed with air is ignited by the heat of compression which is at a high pressure.
The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug.
The fuel is first evaporated after passing through a carburettor and is mixed with air before ignition.
all of the above
✅ The correct answer is option B.