A. Low temperature encountered at high altitude
B. Its high heat transfer rate
C. Its low unit weight per ton of refrigeration
D. Its higher co-efficient of performance (COP)
✅ The correct answer is option C.
Engineering MCQs
Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an __________ body.
A. Grey
B. Black
C. Opaque
D. White
✅ The correct answer is option A.
According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to __________ times the yield stress.
A. 0.5
B. 2
C. √2
D. √3/2
✅ The correct answer is option A.
Iron content in Indian iron ore is about __________ percent.
A. 80-85
B. 60-65
C. 40-45
D. 20-25
✅ The correct answer is option B.
The machanism involved in the removal of metal in drilling operation is by
A. Compression
B. Extrusion
C. Shearing
D. Both A & C
✅ The correct answer is option D.
Hydrogen in liquid steels is dissolved
A. As tiny gas bubbles
B. In the atomic form
C. In the ionic form
D. In the molecular form
✅ The correct answer is option A.
Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of
A. 1:1
B. 1:2
C. 2:1
D. 1:4
✅ The correct answer is option A.
A jet engine turbine blade is normally manufactured by
A. Forging
B. Shell moulding
C. Investment casting
D. Pressure die casting
✅ The correct answer is option C.
With increase in pressure, the saturation temperature of steam
A. Increases rapidly first and then slowly
B. Increases slowly first and then rapidly
C. First increases and then decreases
D. None of these
✅ The correct answer is option A.
Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about
A. 9:1
B. 17 : 1
C. 23 : 1
D. 29 : 1
✅ The correct answer is option B.