Related Questions

The ratio of the indicated thermal efficiency to the air standard efficiency is known as
A Mechanical efficiency
B Overall efficiency
C Volumetric efficiency
D Relative efficiency
A,B,C,D,E,G and I are seven friends who study in three different standards namely 5th, 6th and 7th such that not less than two friends study in the same standard. Each friend also has a different favorite subject namely History, Civics, English, Bangla, Science , Maths , and Economics but not necessarily in the same order. A likes Maths and studies in the 5th standard with only one other friend who likes Bangla. I studies with tow other friends . Both the friends who study with I like languages (Here languages include only Science , English and Bangla ) . D studies in the 6th standard with only one person and does not like Civics . E studies with only one friend . The one who likes history does not study in 5th or 6th standard . E does not like languages. C does not like English , Science or Civics. Which combination represents E's favorite subject and the standard in which he studies?
A Civics and 7th
B Economics and 5th
C Civics and 6th
D History and 7th
The air standard efficiency of an Otto cycle compared to diesel cycle for the given compression ratio is
A Same
B Less
C More
D More or less depending on power rating
Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle
A Heat rejection is lower
B Expansion and compression are isentropic
C Combustion is at constant volume
D Maximum temperature is higher
When cut-off ratio is __________ the efficiency of Diesel cycle approaches to Otto cycle efficiency.
A Zero
B $$\frac{1}{5}$$
C $$\frac{4}{5}$$
D 1
When cut-off ratio is ________; the efficiency of Diesel cycle approaches to Otto cycle efficiency
A $$\frac{1}{4}$$
B Zero
C $$\frac{1}{5}$$
D 2
Thermal efficiency of a two stroke cycle engine is _________ a four stroke cycle engine.
A Equal to
B Less than
C Greater than
D None of these
The indicated thermal efficiency is defined as the
A Ratio of thermal efficiency to the Rankine efficiency
B Ratio of brake power to the indicated power
C Ratio of heat equivalent to indicated power to the energy supplied in steam
D Product of thermal efficiency and Rankine efficiency
The thermal efficiency of a diesel cycle having fixed compression ratio, with increase in cut-off ratio will
A Increase
B Decrease
C Be independent
D May increase or decrease depending on other factors
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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