Related Questions
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4
Starting friction is low in case of the __________ lubrication.
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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
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4
When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the
A. Partial pressure of water vapour is less than the total pressure
B. Humidity is < 100% & dew point temperature of air has not reached
C. Dew point temperature of air has not reached & air is not saturated fully
D. Air is fully saturated
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4
Ganister contains maximum percentage of
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Oxygen cylinders used for autogenous (cutting/welding) purposes are
A. Seamless & made of steel
B. Heat treated before use
D. Welded steel cylinders
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4
Which of the following is not the function of a volute casing provided in a centrifugal pump?
A. To reduce the head loss in discharge
B. To increase the pump efficiency
C. To collect liquid from the periphery of the impeller and to transmit it to the delivery pipe at constant velocity
D. To increase the pump discharge rate
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4
The best lubricants for a machine working at high temperature & load is
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Addition of silicon to cast iron
A. Promotes graphite module formation
B. Improves its ductility
C. Does not promote graphite flakes formation
D. Increases the fluidity of molten metal
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4
Electrolytic reduction cell used for conversion of calcined Al2O3 to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to
A. Achieve very high purity of aluminium (99.9%)
B. Keep the electrolyte in liquid condition by the generation of heat
C. Electrolytically dissociate alumina
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The value of for air & most common gases can be safely assumed to be
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Joining of thin foils is preferred to be done by
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Stellite is a __________ material.
D. Non-ferrous cast alloy cutting tool
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Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as
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Which of the following is not a ferromagnetic material?
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Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by __________ have residual stresses.
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A thin, flat & square plate measuring 2 m × 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m2. The plate temperature will remain constant at 30°C, if the convective heat transfer co-efficient is __________ W/m2 °C.
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Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying oils?
B. Reichert-Meissl value test
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Pick out the wrong conversion of absolute & kinematic viscosities.
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Material of construction of the electrode used in the electric resistance welding is
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'Amortization' in respect of financial obligation of a company means the
A. Liquidation of financial obligations on instalment basis
B. Commitment of financial obligation on priority
C. Liquidation of all the obsolete equipments of the company
D. Modernisation of the plant equipments
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4
Cassiterite is an ore of
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The co-ordination number in simple cubic structure is
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4
Pick out the wrong statement.
A. The equivalent stiffness of two springs (of equal stiffness 'S') in series is S/2 while in parallel is 2S
B. For a helical spring, deflection is proportional to D3 (D = mean coil diameter) or d4 (d = wire diameter)
C. Crushing load or columns is less than the buckling load
D. Modulus of resilience is proportional to (stress at elastic limit)2
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The temperature at which ferromagnetic material can no longer be magnetised by the outside forces, is termed as the
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Titanium is produced by __________ of Ti Cl4.
A. Electrolytic reduction
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For a small scale toy factory, the fixed cost per month is Rs. 5000/-. The variable cost per toy is Rs. 20 and sales price is Rs. 30 per toy. The break even production per month will be __________ toys.
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Iron content in Indian iron ore is about __________ percent.
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4
Air standard Otto cycle is more efficient than the diesel cycle for the same
A. Heat addition & compression ratio
B. Heat addition & pressure
C. Compression ratio & pressure
D. Cylinder dimension & rpm
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The swift cup test evaluates the following property of a sheet metal.
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A material being tested for endurance strength is subjected to the __________ load.