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You Are On Multi Choice Question Bank SET 718
35901. The least count of a steel rule is
(A): 1.0 mm (B): 0.5 mm (C): 0.5 cm (D): 1.0 cm
35902. The mechanical speedometer,drive gear mounted on the
(A): Input shaft (B): Clutch shaft (C): Counter gear shaft (D): Output shaft
35903. Ceramic materials fabrication can not be done by
(A): welding (B): slip casting (C): extrusion (D): plastic pressing
35904. Which has the maximum melting point out of the following ?
(A): Steel (B): Cast iron (C): Stainless steel (D): Wrought iron
35905. Cast iron is
(A): used for making shock resisting parts. (B): manufactured in cupola and is brittle. (C): having compressive strength more than its tensile strength. (D): all , &
35906. Which of the following has no effect on the carbide forming tendency in steels ?
(A): Molybdenum (B): Phosphorus (C): Chromium (D): Vanadium
35907. Approximate value of the modulus of elasticity for steel is about __________ x l06kg/cm2.
(A): 0.5 (B): 2 (C): 40 (D): 75
35908. Carbon is present in steel wholly in the
(A): combined form. (B): free state as graphite. (C): both and . (D): neither nor .
35909. Which test is conducted to know the chemical condition of the plate of a lead acid battery?
(A): High discharge test (B): Open volt test (C): Cadmium test (D): Specific gravity test
35910. In SO3 absorber (Contact Process), packing material used is of
(A): cast iron (B): chemical stoneware (C): karbate (D): mild steel
35911. Presence of manganese in alloy steel improves its
(A): corrosion resistance. (B): cutting ability. (C): abrasion resistance & toughness. (D): elasticity & creep resistance.
35912. Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with
(A): acidic refractory (B): rubber (C): karbate (D): lead or acid-proof bricks
35913. A material is called 'ductile', if it can be
(A): drawn into wires. (B): hammered to a thin sheet. (C): fractured without deformation. (D): made lustrous by heating it.
35914. A chemical change takes place when iron
(A): rusts (B): melts (C): is heated (D): none of these
35915. Evaporator used for concentrating tomato juice is made of
(A): nickel (B): brass (C): stainless steel-glass lined (D): cast iron-rubber lined
35916. High carbon steel contains more than __________ percent carbon.
(A): 0.5 (B): 2.2 (C): 2.5 (D): 2.8
35917. The main constituent of carborundum is __________ carbide.
(A): calcium (B): silicon (C): boron (D): aluminium
35918. For storing water and acid free benzol, use a __________ vessel.
(A): steel (B): karbate (C): stainless steel (D): none of these
35919. The chlorinator used in the manufacture of DDT is made of
(A): glass (B): glass lined steel (C): teflon (D): bakelite
35920. Another name of formula wheel is known as
(A): Pressed steel disc wheel (B): Light alloy wheel (C): Disc wheel (D): Wire Wheel
35921. Age hardening is concerned with
(A): copper (B): brass (C): duralumin (D): silver
35922. Which of the following undergoes granular fracture ?
(A): Wrought iron (B): Steel (C): Cast iron (D): None of these
35923. Ball bearings are normally made of __________ steel.
(A): high speed (B): high carbon (C): chrome (D): silicon
35924. The electrical conductivity of a __________ decreases with rise in temperature.
(A): metal/alloy (B): semi-conductor (C): dielectric (D): none of these
35925. Which one occupies the lowermost position in the electromotive series of metals ?
(A): Aluminium (B): Noble metals (Ag, Pt, Au) (C): Zinc (D): Alkali metals (K, Na, Li)
35926. Addition of nickel to copper improves its
(A): machinability (B): ductility (C): strength (D): hardness
35927. Presence of even 0.005% of __________ in copper makes it highly brittle, rendering it useless for wire-drawing.
(A): oxygen (B): arsenic (C): antimony (D): bismuth
35928. High speed cutting tool steels contain about __________ percent of tungsten.
(A): 6-8 (B): 18-20 (C): 30-35 (D): 50-55
35929. The 'bomb' in the bomb calorimeter is made of
(A): molybdenum stainless steel (B): mild steel (C): high silicon iron (14% Si) (D): copper
35930. Which of the following is produced by condensation polymerisation ?
(A): Bakelite (B): Polythene (C): Poly vinyl chloride (D): Polystyrene
35931. The crystal structure of most of the common metals is
(A): orthorhombic (B): cubic (C): hexagonal (D): none of these
35932. Telfon (PTFE) is corroded by
(A): hydrochloric acid (10%) (B): hydrochloric acid (95%) (C): sulphuric acid (D): none of these
35933. Hastelloy C is a good material of construction in chemical process industry, since it is
(A): highly corrosion resistant and is readily fabricated. (B): relatively inexpensive although it can be fabricated with some difficulty. (C): corrosion resistant to most alkalis, particularly because of its copper content. (D): light and resists attack by acids.
35934. Mixing vessel used for the chlorination of methane to produce methyl chloride is made of
(A): copper (B): cast iron (C): aluminium (D): high carbon steel
35935. The loss of strength in compression which occurs, when there is a gain of strength in tension due to over loading is called
(A): Bauschinger effect. (B): hysterisis. (C): relaxation.
35936. The engine valves are closed by
(A): Camshaft (B): Rocker shaft (C): Valve springs (D): Tappet
35937. The carburetor, the fuel in the float bowl is kept at a constant level by the action of
(A): Opening of the throttle valve (B): Fuel pump (C): Float and needle valve (D): Pressure regulator
35938. Carbon percentage is the same in cast iron and
(A): wrought iron (B): pig iron (C): mild steel (D): high silicon (14%) iron
35939. Which components help to control body roll when cornering or driving rough roa
(A): Sway bar (B): Lower control arm (C): Upper control arm (D): King pin
35940. Any short circuit in the armature winding tested with
(A): Multimeter (B): Ammeter (C): Voltmeter (D): Growler
35941. In order to be called steel, an alloy should have iron percentage greater than
(A): 80 (B): 70 (C): 90 (D): 50
35942. Nickel is a constituent of
(A): bronze (B): solder (C): duralumin (D): monel metal
35943. Soap kettle used in the production of laundry soap is made of
(A): steel with top section nickel clad or stainless steel (B): cast iron (C): nickel (D): concrete
35944. Nickel made/clad equipments are suitable for handling
(A): ammonia (both aqueous & anhydrous). (B): fruit juices, milk & its products and caustic soda solution. (C): nitric acid & hydrochloric acid (conc). (D): sulphuric acid (conc).
35945. Tubes of multiple effect evaporator used for concentration of sugar cane juice are made of
(A): nickel (B): copper (C): stainless steel (D): brass
35946. In hot wire aneomometer used for gas flow measurement, the wire is normally made of
(A): copper (B): platinum (C): constantan (D): chromium
35947. The heat treatment process to which castings and the steel balls produced by cold heading are subjected is
(A): tempering (B): normalising (C): annealing (D): none of these
35948. Mild steel is used for making
(A): fish plates (B): die block (C): channels (D): drop forging
35949. Presence of 0.3 to 0.5% arsenic in copper increases its
(A): ductility (B): malleability (C): tenacity & hardness (D): electrical conductivity
35950. The heat treatment process applied to cold formed steel parts is
(A): normalising (B): tempering (C): artificial ageing (D): solution annealing
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