Section 1

Question 1

Which one of the following is incombustible ?

A. H2
B. CCl4
C. C2H2
D. S

Answer 1

B. CCl4

Question 2

The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding __________ grinding wheel is normally used.

A. hard
B. soft
C. silicon carbide
D. aluminium oxide

Answer 2

D. aluminium oxide

Question 3

Tin based white metals are used, where bearings are subjected to

A. high pressure & load.
B. low pressure & load.
C. high temperature.
D. large surface wear.

Answer 3

A. high pressure & load.

Question 4

Friction factor for fluid flow in pipe does not depend upon the

A. pipe length.
B. pipe roughness.
C. fluid density & viscosity.
D. mass flow rate of fluid.

Answer 4

A. pipe length.

Question 5

All of the following alloying elements of steel increases hardness but sacrifice ductility, except

A. nickel
B. vanadium
C. molybdenum
D. chromium

Answer 5

A. nickel

Question 6

The following type of bonding is strongly directional in solids.

A. Vander Waal’s
B. Ionic
C. Metallic
D. Covalant

Answer 6

D. Covalant

Question 7

Fog is an example of colloidal system of

A. solid dispersed in gas.
B. solid dispersed in liquid.
C. liquid dispersed in gas.
D. gas dispersed in liquid.

Answer 7

C. liquid dispersed in gas.

Question 8

Chromium molybdenum steel can not be welded using __________ welding.

thermit
electrical resistance
oxy-acetylene
any of these

Answer 8

electrical resistance

Question 9

Speisses is a mixture of the following:

Arsenides of heavy metals.
Antimonides of heavy metals.
Arsenides & antimonides of heavy metals.
Iron, cobalt and nickel.

Answer 9

Arsenides of heavy metals.

Question 10

Auto collimator is used to check

flatness
angle
rotor balancing
roughness

Answer 10

angle

Question 11

In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)

t = 15 - 0.0065 h
t = 15 + 0.0065 h
t = 0.0035 h - 15
t = 15 - 0.0035 h

Answer 11

t = 15 - 0.0065 h

Question 12

A high pressure boiler generates steam at a pressure greater than __________ kg/cm2 .

10
30
50
80

Answer 12

80

Question 13

Evaporative cooling process employs a combination of cooling and humidification in which the

sensible heat is added.
sensible heat is removed and the latent heat is added.
latent heat is removed.
sensible heat is added and latent heat is removed.

Answer 13

sensible heat is removed and the latent heat is added.

Question 14

Which of the following is not an explosive ?

TNT
CMC
RDX
Lead azide

Answer 14

CMC

Question 15

Maxwell’s thermodynamic relations applies to the

chemical systems in equilibrium.
mechanical systems in equilibrium.
irreversible thermodynamic processes.
reversible thermodynamic processes.

Answer 15

chemical systems in equilibrium.

Question 16

Annealing ofwhite cast iron produces __________ iron.

grey
nodular
malleable
spheroidal

Answer 16

malleble

Question 17

Resistance of an electrical conductor is proportional to its (where, l = length and A = cross-sectional area of the conductor)

A
l
A2
both ‘a’ & ‘b’

Answer 17

both ‘a’ & ‘b’

Question 18

A solar cell converts the sunlight directly into __________ energy.

thermal
electrical
mechanical
chemical

Answer 18

electrical

Question 19

If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.

critical
breeder
fertile
heterogenous

Answer 19

breeder

Question 20

Wrought iron is never shaped by

casting
cold working
forging
welding

Answer 20

casting

Question 21

Powder metallurgy process does not make metal powder by

atomisation
grinding/milling
hammering
electrolytic deposition

Answer 21

hammering

Question 22

In the blast furnace, incorporation of water vapour in the blast gives the following effect.

Increases the reducing potential of the gas.
Increases the flame temperature.
No significant change occurs.
Increases the hydrogen content in the metal.

Answer 22

Increases the reducing potential of the gas.

Question 23

Pick out the wrong statement.

A ferromagnetic material becomes paramagnetic above the ‘Curie temperature’.
Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials.
Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces.
Tungsten steel and alnico are not hard magnetic materials.

Answer 23

Tungsten steel and alnico are not hard magnetic materials.

Question 24

The usual energy consumption in electric arc furnace steel making is __________ KWh/ton of steel.

60 - 100
400 - 700
1200 -1500
2000 - 2300

Answer 24

400 - 700

Question 25

Maximum permissible air velocity in pipelines is about __________ metre/second. 5 10 20 40

Answer 25

10

Question 26

Area under the stress-strain curve upto the __________ is referred to as the modulus of resilience. yield strength elastic limit proportional limit maximum point

Answer 26

proportional limit

Question 27

__________ is the hardest oxide and is hence used where high wear resistance at high temperature is required. Beryllia Zirconia Alumina Magnesia

Answer 27

Alumina

Question 28

Titanium alloys are welded using the Following process: TIG welding. Submerged arc welding. Butt welding. Electron beam welding.

Answer 28

TIG welding.

Question 29

An alloy of Fe - 0.4 % C is cast iron. hypo-eutectoid steel. hyper-eutectoid steel. eutectoid steel

Answer 29

hypo-eutectoid steel.

Question 30

A material in which the atoms are arranged regularly in some directions but not in others, is termed as 'mesomorphous material'; an example of which is lead glass mica silver

Answer 30

lead

Question 31

In extrusion of metals, which of the following statement is true ? speed of the extruded material is same as that of ram speed. Redundant work is a function of the die angle. Relative motion between the billet surface and the container wall is always present. Hollow ram is used for indirect extrusion.

Answer 31

Hollow ram is used for indirect extrusion.

Question 32

Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV. 20 200 500 1000

Answer 32

200

Question 33

Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans ? Emissivity of pipe surface. Diameter & length of the pipe. Temperature of hot pipe surface & that of air in the room. none of these.

Answer 33

none of these.

Question 34

Machinability of hard alloys and tool steels is improved by spherodising annealing tempering normalising

Answer 34

annealing

Question 35

Transformation range for ferrous material is the temperature interval during which __________ is formed during its heating. cementite austenite martensite pearlite

Answer 35

austenite

Question 36

Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an __________ body. grey black opaque white

Answer 36

grey

Question 37

In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that A. compared to the mass flow rate of cooling water, the rate of condensation of steam is invariably smaller. B. maintaining vacuum on tube side is more difficult than that on the shell side. C. water velocity can be increased conveniently to increase the overall heat transfer co-efficient because of its lower specific volume compared to steam. D. condenser can act as a storage unit for condensed steam.

Answer 37

C. water velocity can be increased conveniently to increase the overall heat transfer co-efficient because of its lower specific volume compared to steam.

Question 38

Cobalt - 60 is used as a source of __________ in medical therapy & industrial radiography. X-rays γ-rays α-rays β-rays

Answer 38

γ-rays

Question 39

Absolute zero pressure can be attained at a temperature of 0°C 50°K 0°R none of these

Answer 39

0°R

Question 40

The product out from a cupola is called wrought iron pig iron cast iron none of these

Answer 40

cast iron

Question 41

Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as Gr0.25, Gr Gr0.25, Gr0.33 Gr, Gr0.25 Gr0.33, Gr0.25

Answer 41

Gr0.25, Gr

Question 42

If the demand for an item is trebled and the order cost is reduced to one third, then the economic order quantity is trebled. remains unchanged. decreases by a factor of 3. decreases by a factor of 1/3.

Answer 42

remains unchanged.

Question 43

Copper deposits are found in India at the following location: Kudremukh Kolar Khetri Ramagundam

Answer 43

Khetri

Question 44

Electrical conductivities of semi-conductors are of the order of __________ ohm/cm. 10^-3 10^3 10^-15 l0^15

Answer 44

10-3

Question 45

Corrosion of metals can not be prevented by its tempering chromising aluminising alloying

Answer 45

tempering

Question 46

Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of Grashoff number. Grashoff number & Reynolds number. Reynolds number. Grashoff number & Prandtl number.

Answer 46

Grashoff number & Prandtl number.

Question 47

The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be parabolic hyperbolic straight line none of these

Answer 47

parabolic

Question 48

Energy of the sun arises mainly from __________ reactions. fusion fission combustion none of these

Answer 48

fusion

Question 49

Which of the following fastening devices has a head at one end and a nut fitted to the other ? Bolt Stud Top bolt None of these

Answer 49

Stud

Question 50

Sudden fall of atmospheric pressure by a large amount is an indication of the rain cold wave storm fair weather

Answer 50

storm