3471. Internal or external threads of different pitches can be produced by
pantograph milling machine
profiling machine
planetary milling machine
piano-miller
✅ 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.
3472. The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and ρ = Density of the fluid)
K.ρ
K/ρ
ρ/K
K.ρ
✅ The correct answer is option B.
3474. The equation of free vibrations of a system is , Its natural frequency is
3 Hz
3π Hz
6 Hz
6π Hz
✅ The correct answer is option A.
3475. Volumetric efficiency of a compressor decreases with __________ in compression ratio.
decrease
increase
✅ The correct answer is option B.
3476. Modular ratio of the two materials is the ratio of
linear stress to linear strain
shear stress to shear strain
their modulus of elasticities
their modulus of rigid
✅ The correct answer is option C.
3477. A better machinable metal is one which gives
lower chip-tool contact area and larger shear angle
higher chip-tool contact area and smaller shear angle
lower chip-tool contact area and smaller shear angle
higher chip-tool conta
✅ The correct answer is option A.
3478. The loss of kinetic energy due to direct impact of two bodies __________ upon the value of coefficient of restitution.
depends
does not depend
✅ The correct answer is option A.
3479. The flank of the tooth is the surface of the tooth __________ the pitch surface.
above
below
✅ The correct answer is option B.
3480. Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal?
Silicon
Sulphur
Manganese
Phosphorus
✅ The correct answer is option A.