Related Questions
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4
For same compression ratio and for same heat added
A. Otto cycle is more efficient than Diesel cycle
B. Diesel cycle is more efficient than Otto cycle
C. Efficiency depends on other factors
D. Both Otto and Diesel cycles are equally efficient
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4
The gas in cooling chamber of a closed cycle gas turbine is cooled at
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4
Second law of thermodynamics defines
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4
The weakest section of a diamond riveting is the section which passes through
D. One rivet hole of the end row
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4
The value of one bar (in S. I. units) is equal to
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4
A path 1-2-3 is given. A system absorbs 100 kJ as heat and does 60 kJ of work while along the path 1-4-3, it does 20 kJ of work. The heat absorbed during the cycle 1-4-3 is
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4
The bending moment of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length is __________ at the fixed end.
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The standard value of atmospheric pressure taken at sea level is
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In case of an under-reinforced beam, the depth of actual neutral axis is __________ that of the critical neutral axis.
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4
Steam coal is a
C. Coking bituminous coal
D. Non-coking bituminous coal
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The extension of a circular bar tapering uniformly from diameter d₁ at one end to diameter d₂ at the other end and subjected to an axial pull of P is given by
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The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and γ = Ratio of specific heats)
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4
The general law of expansion or compression is pvn = C, The process is said to be hyperbolic, if n is equal to
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The value of cp/cv for air is
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4
Kerosene is distilled at
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One kilowatt is equal to
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4
A steel bar of 5 mm is heated from 25°C to 45°C and it is free to expand. The bar will induce
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4
Producer gas is obtained by
A. Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
B. Carbonisation of bituminous coal
C. Passing steam over incandescent coke
D. Passing air and a large amount of steam over waste coal at about 650°C
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4
A vertical column has two moments of inertia (i.e. Ixx and Iyy ). The column will tend to buckle in the direction of the
B. Perpendicular to the axis of load
C. Maximum moment of inertia
D. Minimum moment of inertia
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4
A bar of copper and steel form a composite system, which is heated to a temperature of 40°C. The stress induced in the copper bar will be
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When a closely-coiled helical spring of mean diameter (D) is subjected to an axial load (W), the stiffness of the spring is given by
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The __________ states that change of internal energy of a perfect gas is directly proportional to the change of temperature.
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A column that fails due to direct stress, is called
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The ratio of lateral strain to the linear strain within elastic limit is known as
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4
Which of the following has the minimum atomic mass?
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The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume, is called
A. Specific heat at constant volume
B. Specific heat at constant pressure
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4
The atomic mass of nitrogen is __________ oxygen.
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In order to prevent crushing of masonry at the base of the dam, the maximum stress should be __________ the permissible stress of the soil.
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4
The safe twisting moment for a compound shaft is equal to the
A. Maximum calculated value
B. Minimum calculated value
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The shear force diagram for a simply supported beam carrying a uniformly distributed load of w per unit length, consists of
A. One right angled triangle
B. Two right angled triangles
C. One equilateral triangle
D. Two equilateral triangles