Related Questions
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4
Which of the, following is not associated with the functioning of a petrol engine?
A. Compression ignition system
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4
Tin based white metals are used, where bearings are subjected to
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4
In the acid Bessemer process, the hot metal should have the following composition.
A. S < 0.05% and P < 0.05%
B. S < 0.05% and P < 1.5%
C. S < 0.05% and P > 1.5%
D. S > 1.5% and P < 0.05%
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4
Coarse grained steels have
B. No tendency to distort
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4
Air-petrol ratio in an automotive petrol engine is around
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According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to __________ times the yield stress.
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4
The units of the rate constant for a second order reaction are
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4
An atom bomb works on the principle of
C. Both the nuclear fission & fusion
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Superheating of steam is done at constant
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Melting point & boiling points of liquid oxygen are respectively - 218.8°C & - 183°C, while the same for liquid nitrogen is - 210°C & - 195.8°C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8
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4
Which of the following is not a characteristic observed in material failure by fatigue fracture?
A. Plastic deformation of material does not occur
B. Initiation of crack from below the surface does not occur
C. Initiation of crack occurs on the surface of the machine part
D. Presence of both rough & smooth zone with conchoidal markings in smooth zone of the surface
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There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.
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4
The surface tension of a liquid, at critical temperature is
D. Same as that at any other temperature
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__________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical.
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Which of the following is a commonly used manometric liquid for low pressure range?
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In a furnace with heating element temperature at 1700°C, the dominant mechanism of heat transfer will be
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The dimensional formula of bulk modulus of elasticity is same as that of the
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4
Multistage compression of air as compared to single stage compression offers the advantage of
A. Power saving per unit weight of air delivered
B. Moisture elimination in the inter-stage cooler
C. Increased volumetric efficiency
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4
Steel produced from phosphatic iron is __________ in nature.
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Temper brittleness of a material can be fairly detected by the __________ test.
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More than 95% of __________ is present in corundum.
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The swift cup test evaluates the following property of a sheet metal.
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Alloys having more than 80% copper are generally more
C. Prone to season cracking
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Which of the following approaches the ideal gas behaviour most closely?
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The condition of diffraction from a crystal is given by
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Angular displacement can be measured suitably by a
B. Linear variable differential transducer (LVDT)
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Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel.
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Lead is added to 60:40 brass primarily to improve
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Lead pencil contains
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The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 - T2)/T1. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T1 and T2 is given by