1451. Which of the following iron exist between 910° C and 1403° C?
α-iron
β-iron
γ-iron
δ-iron
✅ 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.
1452. Green sand is a mixture of
30% sand and 70% clay
50% sand and 50% clay
70% sand and 30% clay
90% sand and 10% clay
✅ The correct answer is option C.
1453. A single stage turbine is not used because it requires large reduction gearing due to very high rotational speed.
Agree
Disagree
✅ The correct answer is option A.
1454. Lap joints are employed on plates having thickness
less than 3 mm
5 to 10 mm
12.5 mm
above 25 mm
✅ The correct answer is option A.
1455. A thin circular disc is rolling with a uniform linear speed, along a straight path on a plane surface. Which of the following statement is correct in this regard ?
All points of the disc have the same velocity
The centre of the disc has zero acceleration
The centre of the disc has centrifugal acceleration
The point on the disc
✅ The correct answer is option B.
1456. The value of coefficient of velocity for a sharp edged orifice __________ with the head of water.
decreases
increases
✅ The correct answer is option B.
1457. The centre of gravity a T-section 100 mm x 150 mm x 50 mm from its bottom is
50mm
75mm
87.5mm
125mm
✅ The correct answer is option C.
1459. Conduction is a process of heat transfer
from one particle of the body to another without the actual motion of the particles
from one particle of the body to another by the actual motion of the heated particles.
from a hot body to a cold body, in a straight line, without affecting the intervening medium
none of the above
✅ The correct answer is option A.
1460. The secondary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is
0° and 90°
180° and 360°
both (a) and (b)
none of these
✅ The correct answer is option C.