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You Are On Multi Choice Question Bank SET 720
36001. Chromel (Nichrome) is an alloy of
(A): chromium and molybdenum. (B): nickel and chromium. (C): molybdenum and nickel. (D): chromium and aluminium.
36002. Which of the following is not an alloy of nickel and chromium ?
(A): Inconel (B): Hastealloy (C): Nimonic alloys (D): Duralumin
36003. Thermoplastic resins are those polymers, which
(A): has decreased plasticity at increasing temperature. (B): can not be moulded. (C): easily deform under pressure at high temperature. (D): none of these.
36004. The temperature at which new grains are formed in the metal is called the __________ temperature.
(A): eutectic (B): recrystallisation (C): upper critical (D): lower critical
36005. Molten phthalic anhydride is stored in a/an __________ vessel.
(A): aluminium (B): nickel clad steel (C): lead lined steel (D): glass lined steel.
36006. Fatigue failure of a material results from __________ stress.
(A): tensile (B): compressive (C): fluctuating (D): none of these.
36007. Fermenter used in the production of pen-cillin by deep fermentation proces is a __________ lined steel vessel
(A): rubber (B): monel (C): glass (D): nickel
36008. Which type of the pistons used in two stroke engines?
(A): Flat ahed (B): Concave head (C): Domet head (D): Irregular head
36009. Ability of a material to absorb energy in deformation in the plastic range is characterised as its
(A): ductility (B): toughness (C): creep (D): resilience
36010. Monel alloy is
(A): the costliest of all the alloys of nickel. (B): not suitable for making kitchen utensils. (C): used for making steam valves and turbine blades as it resists steam attack at high temperature. (D): not used in cast and wrought forms.
36011. Molybdenum steels containing 0.15 to 0.40% molybdenum
(A): are prone to temper brittleness. (B): are used for automobile parts like gears, axle, shaft, bearings etc. (C): have very poor fatigue resistance. (D): do not contain nickel or chromium or both.
36012. Kel-F is a material, which is
(A): chemically known as polychlorotrifluor-oethylene (PTFE). (B): having excellent chemical & high temperature resistance (upto 200°C). (C): having elastomeric properties. (D): all , and .
36013. Presence of high amount of silicon in cast iron
(A): suppresses the decomposition of Fe3 C. (B): increases the formation of graphite. (C): increases the contraction of the metal. (D): reduces its fluidity.
36014. Rubber lined pumps can be used to pump
(A): caustic soda (B): chlorinated brine (C): hypochlorous acid (D): all , and
36015. Titanium metal
(A): exists in three allotropic forms. (B): can not be welded. (C): is used in oceanographic and space exploration applications. (D): none of these.
36016. Purity of electrical grade aluminium should be ≥ __________ percent.
(A): 95 (B): 99.5 (C): 85 (D): 90
36017. Maximum consumption of zinc is in
(A): alloying (B): galvanising (C): utensil manufacture (D): electrical industry
36018. Hardest materials so far found is
(A): diamond (B): graphite (C): carborundum (D): pumice stone
36019. Galvanising is not a zinc diffusion process. A zinc diffusion process is termed as
(A): sheradising (B): parkerising (C): anodising (D): none of these
36020. Which of the following commercial metals is most abundantly found in India ?
(A): Copper (B): Aluminium (C): Nickel (D): Zinc
36021. Tin vessels are corroded by
(A): anhydrous ammonia (B): aromatic solvents (C): synthetic detergent solution (D): none of these
36022. Out of the following, copper vessels are the most suitable for the storage of
(A): bromine. (B): dry chlorine & dry fluorine. (C): nitric acid (95% and fuming). (D): phosphoric acid (95%) & sulphuric acid (95% and fuming).
36023. Tempering of steel is done to make it
(A): brittle (B): hard (C): rollable (D): soft
36024. Concrete tank can be used to store
(A): alum (B): ferrous sulphate (C): sulphuric acid (D): saturated brine
36025. Zinc is highly __________ at room temperature.
(A): ductile (B): resistant to atmospheric corrosion (C): malleable (D): brittle
36026. Which of the following constituents of cast iron is mainly responsible for imparting it an anti-corrosive property ?
(A): Silicon (B): Phosphorus (C): Sulphur (D): None of these
36027. Most common stainless steel type 316, which is highly resistant to corrosion contains
(A): 16-13% Cr 10-14% Ni and 2-3% Mo. (B): 20-22% Cr, and 8-10% Ni. (C): 2-4% Cr, 22% NI and 2-4% Mo. (D): none of these.
36028. Which are constant clearance pistons?
(A): Steel-belted piston (B): Slipper piston (C): Cam ground piston (D): Slot skirt piston
36029. Which type of bearings used in wheel hub?
(A): Taper roller bearing (B): Roller bearing (C): Ball bearing (D): Bush bearing
36030. Which of the following is a non-magnetic material ?
(A): Cobalt (B): Zinc (C): Nickel (D): None of these
36031. An alloy used as thermocouple material comprises of 40% nickel and 60% copper. It is called
(A): constantan (B): kanthal (C): chromel (D): German silver
36032. The material of construction of pressure mills used for squeezing out the juice from sugar cane is
(A): stainless steel (B): cast iron (C): mild steel (D): monel
36033. Rotary driers are generally made of
(A): cast iron (B): mild steel (C): high silicon iron (14% Si) (D): tin lined with refractory bricks
36034. Presence of high phosphorous in cast iron increases its
(A): fluidity (B): melting point (C): shrinkage (D): tensile strength
36035. The phenomenon in which slow extension of material takes place with the time at constant load is called
(A): plasticity (B): creep (C): elasticity (D): ductility
36036. A material capable of undergoing large permanent deformation, when subjected to compression is termed as
(A): malleable (B): ductile (C): brittle (D): none of these
36037. __________ is used for examining the macro-structure of a material.
(A): Metallurgical microscope (B): Optical microscope (C): X-rays (D): Visual inspection by naked eye
36038. Which type of camshaft drive mechanism is used in over head camshaft engine?
(A): All of the above (B): Gear drive (C): None of the above (D): Chain drive
36039. Dry chlorine can be handled in a vessel made of
(A): iron or steel (B): PVC nickel (C): brass
36040. Brine solution is stored/treated in __________ lined vessels/pipes.
(A): rubber (B): lead (C): glass (D): nickel
36041. Steel balls for ball bearings are generally made of __________ steel.
(A): cast (B): stainless (C): free carbon (D): carbon chrome
36042. Beehive coke ovens are made of __________ bricks.
(A): silica (B): fireclay (C): silicon carbide (D): corundum
36043. Muntz metal is a/an alloys of
(A): magnesium & tin (B): ferrous material (C): lead & tin (D): copper & zinc
36044. Rotary kilns in cement industry are lined with____bricks.
(A): fireclay (B): silica (C): lead (D): high alumina & high magnesia
36045. Steel will respond to hardening by heat treatment processes, only when the minimum carbon content in it is __________ percent.
(A): 0.02 (B): 0.2 (C): 0.35 (D): 0.5
36046. Which of the following will have the highest melting point ?
(A): Pig iron (B): Mild steel (C): Wrought iron (D): High carbon steel
36047. Galvanising is generally done on
(A): non-ferrous metals (B): low carbon steel (C): stainless steel (D): cast iron
36048. Carbon is present in the combined form (carbide) in case of
(A): pig iron (B): steel (C): ferroalloys (D): all , &
36049. Chilled iron castings are
(A): easily machinable (B): soft on surface (C): highly wear resistant (D): none of these
36050. A hardness depth of about 3 mm can be achieved by induction hardness in __________ seconds.
(A): 5 (B): 100 (C): 250 (D): 500
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