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For the following questions answer them individually
In regenerator type heat exchanger, heat transfer takes place by
direct mixing of hot and cold fluids
a complete separation between hot and cold fluids
flow of hot and cold fluids alternately over a surface
generation of heat again and again
Film coefficient is the ratio of _____.
Thickness of film of fluid to thermal conductivity
Thickness of film of fluid to temperature drop through film of fluid
Thermal conductivity to temperature drop through film of fluid
Thermal conductivity to equivalent thickness of film of fluid
Highest thermal diffusivity is of _____.
Iron
Lead
Concrete
Wood
Highest thermal conductivity is of _____.
Solid ice
Melting ice
Water
Steam
The ratio of work done per cycle to the swept volume in case of compressor is called
compression index
compression ratio
compressor efficiency
mean effective pressure
The indicator diagram shown in the figure below obtained on a compressor shows that _______.
suction valve or piston rings, or both are leaking
discharge valve is leaking into cylinder during compression stroke
slow opening suction valve
suction valve sticking open at beginning of compression stroke
Metals are good heat conductors because _____.
of free electrons present
their atoms are relatively far apart
their atoms collide frequently
All options are correct
Heat is transferred from an insulated pipe to the surrounding still air by _____.
Conduction
Convection
Radiation
Heat is transferred by conduction, convection and radiation in _____.
Boiler furnaces
Melting of ice
Condensation of steam in condenser
None of these
In optical pyrometers absorption filter is used _____.
To get monochromatic light
To eliminate stray rays of light
To minimise reflection of rays from the lens surface
To enable filament operation at reduced intensity for longer life
CAT Linear Equations
CAT Inequalities
CAT Quadratic Equations
CAT Averages, Ratios & Proportions
CAT Profit & Loss
CAT Number Systems
CAT Time, Distance & Work
CAT Geometry
CAT Progressions & Series
CAT Probability Combinatorics
CAT Venn Diagrams
CAT Data Sufficiency
CAT Logarithms, Surds & Indices
CAT Functions, Graphs & Statistics
CAT Miscellaneous
CAT DI Basics
CAT DI Charts
CAT Data Interpretation
CAT DI Data Change Over Period
CAT Tables With Missing Values
CAT DI Venn Diagrams
CAT DI Special Charts
CAT DI Maxima & Minima
CAT Quant-Based DI
CAT DI Connected Sets
CAT DI Miscellaneous
CAT LR Arrangement
CAT LR Selections With Conditions
CAT LR Coins & Weights
CAT LR Truth & Lie
CAT LR Puzzles
CAT LR Scheduling
CAT LR Games & Tournaments
CAT 2D & 3-D LR
CAT Quant-Based LR
CAT LR Miscellaneous
CAT Vocabulary
CAT Reading Comprehension (RC)
CAT Para Jumbles
CAT Para Completion and Summary Questions
CAT Grammar & Sentence Correction
CAT Critical Reasoning
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