4691. The blade velocity coefficient is ratio of relative velocity of steam at outlet tip of the blade to the relative velocity of steam at inlet tip of the blade.
TRUE
FALSE
✅ 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.
4692. A series of operations, which takes place in a certain order and restore the initial conditions at the end, is known as
reversible cycle
irreversible cycle
thermodynamic cycle
none of these
✅ The correct answer is option C.
4693. Cast iron during machining produces
continuous chips
discontinuous chips
continuous chips with built-up-edge
none of these
✅ The correct answer is option B.
4694. The optimum effective temperature for human comfort is
higher in winter than in summer
lower in winter than in summer
same in winter and summer
not dependent on season
✅ The correct answer is option B.
4695. If a number of forces are acting at a point, theirresultant will be inclined at an angle θ with the horizontal, such that
tan θ = ∑H/∑V
tan θ = ∑V/∑H
tan θ = ∑Vx∑H
✅ The correct answer is option B.
4696. In a four stroke cycle petrol engine, the inlet valve
opens at top dead centre and closes at bottom dead centre
opens at 20° before top dead centre and closes at 40° after bottom dead centre
opens at 20° after top dead centre and closes at 20° before bottom dead centre id) may open or close anywhere
✅ The correct answer is option B.
4697. The maximum number of jets, generally, employed in an impulse turbine without jet interference are
two
four
six
eight
✅ The correct answer is option C.
4698. A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall per unit length is (where w = Specific weight of liquid, and H = Height of liquid)
wH
wH/2
wH2/2
wH2/3
✅ The correct answer is option C.
4699. According to Dalton’s law of partial pressures, (where pb = Barometric pressure, pa = Partial pressure of dry air, and pv = Partial pressure of water vapour)
Pb = pa – pv
Pb = pa + pv
Pb = pa x pv
Pb = pa/pv
✅ The correct answer is option B.
4700. The pressure measured with the help of a piezometer tube is in
N/mm2
N/m2
head of liquid
all of these
✅ The correct answer is option C.