4471. If the grain size is __________ the tool life is better.
smaller
larger
✅ The correct answer is option B.
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.
4473. In a thick cylindrical shell subjected to an internal pressure (p), the maximum radial stress at the inner surface of the shell is
zero
p (tensile)
#NAME?
2p (tensile)
✅ The correct answer is option C.
4474. A pressure vessel is said to be a thick shell, if the ratio of wall thickness to its diameter is
equal to 1/10
less than 1/10
greater than 1/10
none of these
✅ The correct answer is option C.
4475. In a convergent mouthpiece, the absolute pressure head at vena contracta is the same as that of the atmosphere.
TRUE
FALSE
✅ The correct answer is option A.
4476. Flank wear depends upon the
hardness of the work and tool material at the operating temperature
amount and distribution of hard constituents in the work material
degree of strain hardening in the chip
all of these
✅ The correct answer is option B.
4477. Which of the following statement is correct for orthogonal cutting system?
The cutting edge of the tool is perpendicular to the direction of tool travel.
The cutting edge clears the width of the workpiece on either ends.
The chip flows over the tool face and the direction of the chip flow velocity is normal to the cutting edge.
all of the above
✅ The correct answer is option D.
4478. A bolt of M 24 x 2 means that
the pitch of the thread is 24 mm and depth is 2 mm
cross-sectional area of the threads is 24 mm2
the nominal diameter of bolt is 24 mm and pitch is 2 mm
the effective diameter
✅ The correct answer is option C.
4479. A reciprocating pump is also called a __________ displacement pump.
positive
negative
✅ The correct answer is option A.
4480. When wood is heated with a limited supply of air to a temperature not less than 280°C, the resulting fuel is
coke
wood charcoal
bituminous coal
briquetted coal
✅ The correct answer is option B.