441. Venturimeter is used to measure the flow rate of fluids in pipes, when the pipe is in __________ position.
A. Horizontal
B. Vertical
C. Inclined
D. Any
✅ The correct answer is option D.
Engineering
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442. The most commonly used moderator in nuclear power plants is
A. Graphite
B. Light water
C. Heavy water
D. Berellium
✅ The correct answer is option A.
443. The material used for coating the welding electrode is termed as the
A. Flux
B. Slag
C. Protective layer
D. Binder
✅ The correct answer is option B.
444. A floating body oscillates about its __________ when it is displaced slightly.
A. Centre of gravity
B. Metacentre
C. Centre of buoyancy
D. Centre of pressure
✅ The correct answer is option B.
445. Methyl orange indicator turns
A. Orange yellow in alkaline medium
B. Orange yellow in acidic medium
C. Colourless in acidic medium
D. Colourless in basic medium
✅ The correct answer is option A.
446. Young’s modulus of a material is the measure of its
A. Stiffness
B. Malleability
C. Creep resistance
D. Tensile strength
✅ The correct answer is option A.
447. Cobalt – 60 is used as a source of __________ in medical therapy & industrial radiography.
A. X-rays
B. Γ-rays
C. Α-rays
D. Β-rays
✅ The correct answer is option B.
448. Consider an ideal solution of components A and B. The entropy of mixing per mole of an alloy containing 50 wt% B is
A. R ln 2
B. -R ln 2
C. 3 R ln 2
D. -3R ln 2
✅ The correct answer is option A.
449. Holes for rivetting purposes should be preferably made by
A. Cutting torch
B. Drilling
C. Punching
D. None of these
✅ The correct answer is option B.
450. Which of the following heat treatment processes is used for softening the hardened material?
A. Normalising
B. Tempering
C. Annealing
D. None of these
✅ The correct answer is option B.