981. Gratings is associated with the measurement of
A. Linear displacement
B. Concavity/convexity
C. Surface texture
D. Flatness
✅ The correct answer is option A.
983. The atmospheric temperature during melting of ice/snow (in the atmosphere)
A. Decreases
B. Increases
C. Remains same
D. May increase or decrease ; depends on the altitude where snow melts
✅ The correct answer is option A.
987. __________ is the most important element, which controls the physical properties of steel.
A. Manganese
B. Silicon
C. Carbon
D. Vanadium
✅ The correct answer is option C.
989. The size of the tetrahedral void in the closest packing of atoms is __________ that of the octahedral void.
A. Equal to
B. Greater than
C. Less than
D. Either A, B or C; depends on the size of atom
✅ The correct answer is option C.
991. Age hardening is connected with
A. Babbit metal
B. Gun metal
C. Stainless steel
D. Duralumin
✅ The correct answer is option D.
993. A hot short metal is
A. Hard when hot
B. Brittle when cold
C. Brittle when hot
D. Brittle under all conditions
✅ The correct answer is option C.
995. Which of the following metals is the most prone to work hardening?
A. Brass
B. Aluminium
C. Copper
D. Lead
✅ The correct answer is option A.
998. Safety matches is produced using
A. Red phosphorus
B. Yellow phosphorus
C. Black phosphorus
D. Elemental sulphur
✅ The correct answer is option A.
1001. The preferred alloying element for low temperature applications of steel is
A. Cr
B. N
C. Mo
D. Ni
✅ The correct answer is option D.