The type of pump used for lifting large quantity of sewage is a _________________ pump ?
(A) Gear
(B) Centrifugal
(C) Reciprocating
(D) Plunger
Coating provided on the electrodes used in the arc welding is not expected to_________________?
(A) Add alloying elements
(B) Prevent electrode from contamination
(C) Stabilise the arc
(D) Provide protective atmosphere to weld
Non-ferrous alloys used for making cutting tools need not have high__________________?
(A) Abrasion resistance
(B) Toughness
(C) Red hardness
(D) Cutting speed
Transformer cores are normally made from ______________________?
(A) Soft ferrites
(B) High purity iron
(C) Grain oriented Fe-Si alloy
(D) Al-Ni-Co alloy
Pearlite comprises of__________________?
(A) 87% cementite & 13% Fe
(B) 87% ferrite & 13% cementite
(C) 93.33% ferrite & 6.67% C
(D) 87% ferrite & 13% C
Spheroidising of a material is a/an ________________ process?
(A) Normalising
(B) Annealing
(C) Tempering
(D) Hardening
_______________ number determines whether the fluid flow in an open channel is super-critical, critical or sub-critical ?
(A) Mach
(B) Reynolds
(C) Froude
(D) Weber
Satellite is a _________________ material?
(A) Ferrous
(B) Ceramic
(C) Cemented carbide
(D) Non-ferrous cast alloy cutting tool
_____________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C ?
(A) Borosilicate
(B) High silica
(C) Supermax
(D) Lead
Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity) ____________________?
(A) 1/k
(B) k
(C) k2
(D) 1/k2