A jig is used while __________ a hole.
Boring
Counter boring
Drilling
Enlarging
Correct Answer :
C. Drilling
Related Questions
Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by
Conduction
Convection
Radiation
Both 'a' & 'b'
Air intake for an air compressor should be preferably taken from
A site, where cooling towers are located nearby
A site, where open coal yard in located nearby
An air conditioned room maintained at a temperature of 18°C
An outside atmosphere at 10°C
Shampoos are commercially not available in the form of
Powder
Gaseous mixture
Solution
Emulsion
Strain hardening effect in metals subjected to cold working is due to the __________ mechanism.
Slip
Fracture
Winning
Dislocation
Temperature attained in soldering of metals is about __________ °C.
150-300
400-500
650-800
1000-1100
Which of the following does not discharge the dust collected as a dry solid?
Electrostatic precipitator
Wet scrubber
Bag filter
Gravity settling chamber
Function of gear box is to
Reduce the speed
Obtain variable speed
Increase the speed
Produce high torque
Blasting of tri-nitro-toluene (TNT) is done by mixing it with ammonium
Nitrate
Sulphate
Carbonate
Chloride
Titanium is added to molten aluminium alloys before casting for the purpose of
Grain refinement
Increasing corrosion resistance
Reducing porosity
Improving fluidity
Which of the following rays has the least wavelength?
Ultraviolet rays
Infrared rays
Cosmic rays
X-rays
With increase in temperature, the surface tension of water
Increases
Decreases
Remain constant
Increases linearly
Wrought iron is not
Ductile & resistant to corrosion/rusting
Weldable easily
Having uniform strength in all directions
Having maximum tensile strength along the lines of slag distribution
The same volume of all gases is representative of their
Specific gravities
Densities
Gas characteristic constants
Molecular weights
Out of the following, the __________ pipe has the least corrosion resistance.
Mild steel
Copper
Cast iron
Wrought iron
Which of the following is prone to cup and cone fracture?
Cast iron
Soft brass
Round specimen of ductile metal
Flat tensile specimen of ductile metal
The joint for soldering is supported by binding wire made of
Mild steel
Copper
Soft iron
Stainless steel
Water hammer is caused in steam carrying pipelines, because of
Partial condensation of steam
Vibration of the pipeline
High degree of superheat of steam
Its exposure to torrential rain
Dryness fraction of dry steam is
0
∞
1
0.5
The size of the tetrahedral void in the closest packing of atoms is __________ that of the octahedral void.
Equal to
Greater than
Less than
Either (A), (B) or (C); depends on the size of atom
__________ is used as a material of construction for the blade of power saw.
Wrought iron
Stainless steel
Mild steel
High speed steel
Potable water means the water used for
Fire-fighting
Cooling
Drinking
Evaporation to produce steam
Out of the following, the most malleable material is
Copper
Aluminium
Wrought iron
Lead
Function of fusible plug in a boiler is to
Drain out water and sludge from the boiler during repair
Put off fire in the furnace when water level in the boiler falls to unsafe limit
Guard the boiler in case of abnormal rise in steam pressure
All (A), (B) & (C)
A dummy activity is used in PERT network to describe the
Precedence relationship
Resource idleness
Resource restriction
Necessary time delay
Factor of safety is the ratio of the __________ stress to the working stress.
Tensile
Compressive
Yield
Bearing
The most suitable material of construction for a sewer to carry sewage under high pressure is
Asbestos cement
Steel
Cement concrete
Stoneware
Calorific value of __________ are almost same.
Lignite & anthracite coal
Lignite & coal gas
Petrol & diesel
Coal gas & natural gas
Pick out the wrong statement.
Weldability of high carbon steel is poorer compared to low carbon steel
Invar is a magnetic alloy
Magnetic permeability of the diamagnetic material is less than one
Martenistic transformation never goes to completion (i.e., 100%) at room temperature
Lead is added to 60:40 brass primarily to improve
Machinability
Corrosion resistance
Fluidity
Strength
Boiler tube size is specified by its thickness and __________ diameter.
Outside
Inside
Mean
None of these