1681. If the modulus of elasticity for a given material is twice its modulus of rigidity, then bulk modulus is equal to
2C
3C
✅ 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.
1682. Tachometer in a vehicle measures
speed
distance
engine r.p.m.
fuel consumption
✅ The correct answer is option C.
1683. A wood-ruff key is
a tapered key with head at one end
fitted in pairs at right angles
capable of tilting in a recess milled out in the shaft
all of the above
✅ The correct answer is option C.
1684. For minimum work required to compress and deliver a quantity of air by multi-stage compression,
the compression ratio in each stage should be same
the intercooling should be perfect
the workdone in each stage should be same
all of the above
✅ The correct answer is option D.
1685. A rectangular beam subjected to a bending moment is shown in the below figure. The upper layer of the beam will be in tension.
TRUE
FALSE
✅ The correct answer is option B.
1686. The mode of deformation of the metal during spinning is
bending
stretching
rolling and stretching
bending and stretching
✅ The correct answer is option D.
1687. The theoretical indicator diagram of a simple steam engine is based upon the assumption that
there is no pressure drop due to condensation
steam is admitted at boiler pressure and exhausted at condenser pressure
the expansion (or compression) of the steam is hyperbolic
all of the above
✅ The correct answer is option D.
1688. The critical pressure of a liquid is the pressure
above which a liquid will remain a liquid
above which a liquid will explode
above which a liquid will always convert into a vapour
below which a liquid w
✅ The correct answer is option A.
1689. The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is
ρ ω2 r2
2ρ ω2 r2
✅ The correct answer is option C.
1690. The heat supplied to the gaS at constant volume is (where m = Mass of gas, cv = Specific heat at constant volume, cp = Specific heat at constant pressure, T2 – T1 = Rise in temperature, and R = Gas constant)
mR(T2 – T1)
mcv(T2 – T1)
mcp(T2 – T1)
mcp(T2 + T1)
✅ The correct answer is option B.