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Q. The unit of power is called -
1 Watt
2 Dyne
3 Erg
4 Ohm
Ans: 1
Q. The sound produced by a bat is -
1 Ultrasonic
2 Infrasonic
3 Audible
4 Subsonic
Ans: 1
Q. When a bar magnet is cut into two equal halves, the pole strength of each piece -
1 Becomes zero
2 Remains the same
3 Becomes Half
4 Becomes Double
Ans: 2
Q. In a refrigerator, cooling is produced by
1 the evaporation of a volatile liquid
2 the sudden expansion of a compressed gas
3 the ice which deposits on the freezer
4 None of the above
Ans: 1
Q. Which principle states that when a body is partially or totally immersed in a fluid, it experiences an upward thrust equal to the weight of fluid displaced by it:
1 Archimedes'
2 Hooke's
3 Pascal's
4 Newton's
Ans: 1
Q. Cream gets separated from milk when it is churned because of:
1 Gravitational force
2 Centrifugal force
3 Frictional force
4 Cohesive force
Ans: 2
Q. Speed of sound is maximum in:
1 Gas
2 Same in all cases
3 Liquid
4 Solid
Ans: 4
Q. Newton is a unit of:
1 Force
2 Acceleration
3 Work
4 Energy
Ans: 1
Q. The mass of a body at the centre of earth is:
1 Zero
2 Remains constant
3 More than at the surface
4 Less than at the surface
Ans: 2
Q. 1 Joule is equivalent to
1 103ergs
2 105 ergs
3 107ergs
4 1011
[DOUBLEPOST=1357439824][/DOUBLEPOST]Q. The coating of a thin layer of zinc on steel or iron objects is known as
Ans: 3
1 Galvanising
2 Hot dipping
3 Tinning
4 Electroplating
Ans: 1
Q. Electric current in a metal wire is due to the flow of
1 Protons
2 Electrons
3 Ions
4 None of these
Ans: 2
Q. Optic fibres are mainly used for
1 Weaving
2 Communication
3 Musical instruments
4 Food industry
Ans: 2
Q. Which among the following is a chemical change?
1 A wet towel dries in the sun
2 Lemon juice added to tea causing its colour to change
3 Coffee is brewed by passing steam through ground coffee
4 Hot air rises over a radiator
Ans: 2
Q. Which of the following is a vector quantity?
1 Force
2 Temperature
3 Energy
4 Momentum
Ans: 1
Q. At what point the Centigrade and the Fahrenheit temperatures are the same?
1 10 degree
2 0 degree
3 -10 degree
4 -40 degree
Ans: 4
Q. Which among the following is an element?
1 Alumina
2 Brass
3 Graphite
4 Silica
Ans: 3
Q. In lathe machine, taper turning can be done by
1 Set over arrangement
2 Taper turning attachment
3 Swiveling compound rest
4 All of the above
Ans: 4
Q. In electro discharge machining, cutting tools are usually made of
1 High speed steel
2 Tool steel
3 Carbide-tipped tool
4 Graphite
Ans: 4
Q. Glass is made of
1 Sand & Silicate
2 Quartz & Mica
3 Sand & Silt
4 None of these
[DOUBLEPOST=1357439844][/DOUBLEPOST]Q. Which of the following is called strategic metal?
Ans: 2
1 Silicon
2 Titanium
3 Uranium
4 Germanium
Ans: 3
Q. Heavy water is
1 Sea water(H2O + salt)
2 D2O2
3 H2O2
4 None of the above
Ans: 2
Q. The operation of threading a drilled hole is called
1 Tapping
2 Broaching
3 Lapping
4 Reaming
Ans: 1
Q. The first symbol in a grinding wheel code is the
1 Bond Type
2 Grain size
3 Structure
4 Abrasive Type
Ans: 4
Q. Thermit welding is a form of
1 Gas welding
2 Fusion welding
3 Resistance welding
4 Arc welding
Ans: 2
Q. Electrode gets consumed in which type of welding process?
1 Arc
2 Thermit
3 T.I.G.
4 Gas
Ans: 1
Q. Which of the following metals can be easily drawn into the wire?
1 Lead
2 Copper
3 Tin
4 Zinc
Ans: 2
Q. Base of a transistor is
1 Heavily doped
2 Moderately doped
3 Lightly doped
4 None of the above
Ans: 4
Q. Lube oil is used in diesel engines
1 To ignite
2 To cool the engine
3 To reduce friction
4 2 and 3 both
Ans: 4
Q. Air is charged in the cylinder of diesel engine by
1 Exhaust valve
2 Inlet valve
3 Injector
4 Air Box
[DOUBLEPOST=1357439863][/DOUBLEPOST]Q. Type of filter fitted in a tractor is
Ans: 2
1 Paper Type
2 Cotton Type
3 Oil-bath Type
4 Wire Mesh Type
Ans: 1
Q. Nichrome is commonly used for
1 Transformer windings
2 Battery connetions
3 Lamp filament
4 Heater coils
Ans: 4
Q. For a flexible cable, most suitable insulation is
1 Glass fibre
2 Magnesium oxide
3 Polyvenyl chloride
4 Insulating tape
Ans: 3
Q. Function of a carburator is
1 To mix petrol with air
2 To supply petrol to the engine
3 To purify the air
4 To purify the petrol
Ans: 1
Q. The supply which cannot pass through condensor
1 Is DC supply
2 Is 12 volt AC
3 Is AC supply
4 Depends on the type of circuit
Ans: 3
Q. The terminal impedance of folded dipole television antenna is kept
1 300 ohms
2 75 ohms
3 0 ohm
4 100 ohms
Ans: 2
Q. The efficiency of an air-conditioning plant is expressed by
1 Percentage
2 Temperature
3 C.P.O.
4 Tonnes
Ans: 4
Q. A plug guage is used to measure the
1 Pitch of thread
2 Bores of cyclinders
3 Angles
4 Flatness
Ans: 2
Q. An optical gauge works on the principle of
1 Interference of light
2 Reflection
3 Dispersion
4 Polarisation
Ans: 1
Q. A fluorescent tube contains
1 Argon
2 Nitrogen
3 Neon
4 Oxygen
[DOUBLEPOST=1357439882][/DOUBLEPOST]Q. The feeding of a job in planner is done by
Ans: 3
1 Table movement
2 Tool movement
3 Ram movement
4 Movement of a clapper box
Ans: 4
Q. Which of the following machines utilises fly cutters?
1 Planner
2 Milling machine
3 Lathe machine
4 Shaper
Ans: 2
Q. Crater wear takes place in single point cutting tool at
1 Flank
2 Rake
3 Side
4 Both Flank & Rake
Ans: 4
Q. It is difficult to magnetise steel because of its
1 Low permeability
2 High retentivity
3 High permeability
4 High density
Ans: 1
Q. In electric machines, laminated cores are used with a view to reduce the
1 Friction loss
2 Copper loss
3 Eddy current loss
4 Hysteresis loss
Ans: 3
Q. In DC generators, the brushes are always placed
1 Along the Geometric Neutral Axis (GNA)
2 Along the Magnetic Neutral Axis (MNA)
3 Perpendicular to MNA
4 Perpendicular to GNA
Ans: 2
Q. Critical resistance of a DC generator RC is
1 Inversely proportional to speed
2 Proportional to speed
3 Inversely proportional to the square of speed
4 Proportional to the square of speed
Ans: 1
Q. If the current and the voltage are out of phase by 90 degree, then the power is
1 Minimum
2 Maximum
3 1.1 VI
4 Zero
Ans: 4
Q. Megger is an instrument to measure
1 Very low resistance
2 Insulation resistance
3 Q of a coil
4 Inductance of a coil
Ans: 2
Q. The forward resistance of a diode is
1 Zero
2 Infinity
3 Very small
4 Very large
[DOUBLEPOST=1357439902][/DOUBLEPOST]Q. For lubricating roller bearing, lubricant generally required is
Ans: 1
1 Semi-solid
2 Solid
3 Liquid
4 None of the above
Ans: 1
Q. Which type of reaction produces the most harmful radiation?
1 Fusion reaction
2 Chemical reaction
3 Fission reaction
4 Photo-Chemical reaction
Ans: 3
Q. The velocity of sound is maximum in -
1 Vacuum
2 Metal
3 Liquid
4 Air
Ans: 2
Q. When you pull out the plug connected to an electrical appliance, you often observe a spark. To which property of the appliance, is this related?
1 Capacitance
2 Resistance
3 Inductance
4 Wattage
Ans: 1
Q. The focal length of a convex lens is
1 shorter for blue light than for red
2 the same for all colours
3 shorter for red light than for blue
4 maximum for yellow light
Ans: 1
Q. When a ball drops on to the floor it bounces. Why does it bounce?
1 The floor heats up on impact
2 Newton's third law implies that for every action there is a reaction
3 File floor exerts a force on the ball during the impact
4 The floor is perfectly rigid
Ans: 2
Q. A body has a mass of 6 kg on the Earth; when measured on the Moon, its mass would be
1 nearly 1 kg
2 6 kg
3 less than 1 kg
4 less than 6 kg
Ans: 2
Q. Transformer is a kind of appliance that can 1. increase power 2. increase voltage 3. decrease voltage 4. measure current and voltage Select the correct answer using the code given below:
1 2 and 3 only
2 1 and 4
3 4 only
4 2, 3 and 4
Ans: 1
Q. Which of the following is used for correcting myopic eyes?
1 Convex Lens
2 Concave Lens
3 Cylindrical Lens
4 None of the above
Ans: 2
Q. The sky appears blue due to-
1 Scattering of light
2 Reflection of light
3 Refraction of light
4 Diffraction of light
Ans:1
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