441. Super conduction in metals is observed at a temperature of ________________ °K?
A. About 273
B. >100
C. <100
D. About 373

442. Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an ______________ body?
A. Grey
B. Opaque
C. Black
D. White

443. Which of the following is the largest quantum of pressure ?
A. 1 bar
B. 1 kg/cm2
C. 1 atmosphere
D. 1 kilo Pascal

444. Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at________________?
A. 0°K
B. Zero pressure
C. High vacuum
D. Earth’s centre

445. In case of water (Prandtl number ≈ 6) flowing over a flat plate heated over the entire length, the thermal boundary layer thickness as compared to hydrodynamic boundary layer thickness is ?
A. Less
B. Equal
C. More
D. Unpredictable

446. The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the________________?
A. Creep strength
B. Fatigue strength
C. Resilience
D. Endurance limit

447. Hot working of lead is carried out at ___________________?
A. 150°C
B. 373°K
C. 75°C
D. Room temperature

448. The Al2O3 content of cryolite in Hall-Heroult cell is maintained between _______________ percent ?
A. 2-5
B. 12-15
C. 18-20
D. 6-12

449. Fatigue resistance of a material is measured by the _____________________?
A. Ultimate tensile strength
B. Elastic limit
C. Young’s modulus
D. Endurance limit

450. Ultimate strength in tension as compared to that in shear for steel is____________________?
A. One third
B. Half
C. One and half times
D. One fourth

NOTE
IF YOU THINK ANY OF THE MCQ ABOVE IS WRONG.
PLEASE COMMENT WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION IN COMMENT BOX.
THANK YOU