Air in 1 bar and 40°C flows into an evacuated tank until the pressure in the tank is 1 bar . Assume that the process is adiabatic and the temperature of the surroundings is 40°C. What is the final temperature of air (in °C)
Which equation correctly
represents the steady flow process where enthalpy, work and heat are in kJ/kg,
velocity is in m/s and gravitational acceleration is in
कौन सा समीकरण स्थिर प्रवाह प्रक्रिया को सही ढंग से दर्शाता है जहां एन्थैल्पी, कार्य और ऊष्मा kJ/kg में है, वेग m/s में है और गुरुत्वाकर्षण त्वरण है?
General
energy equation for a steady flow system is
एक स्थिर प्रवाह प्रणाली के लिए सामान्य ऊर्जा समीकरण है
Which statement represents the steady flow energy equation for a boiler?
कौन सा कथन बॉयलर के लिए स्थिर प्रवाह ऊर्जा समीकरण का प्रतिनिधित्व करता है?
What is the drop in enthalpy (in kJ/kg) for a steam whistle which is perfectly insulated and does not work has an exit velocity of steam at 40 m/sec?
The first Carnot engine work under
temperature between T1 and
T2 and the second Carnot
engine work under T2 and T3 which of the following is
TRUE for the above mentioned Carnot engines for same work output?
पहला कार्नोट इंजन T1 और T2 के बीच तापमान के तहत काम करता है और दूसरा कार्नोट इंजन T2 और T3 के तहत काम करता है, समान कार्य आउटपुट के लिए उपर्युक्त कार्नोट इंजन के लिए निम्नलिखित में से कौन सा सत्य है?
Which of the following is TRUE for real thermodynamic cycle?
वास्तविक थर्मोडायनामिक चक्र के लिए निम्नलिखित में से कौन सा सत्य है?
An inventor states that the new engine
invented rejects 30% of the heat it absorbs from the reservoir, while the
temperature of the source and the sink are maintained at 500 K and 200 K
respectively. His engine is equivalent to ________.
एक आविष्कारक का कहना है कि आविष्कार किया गया नया इंजन जलाशय से अवशोषित गर्मी का 30% अस्वीकार कर देता है, जबकि स्रोत और सिंक का तापमान क्रमशः 500 K और 200 K पर बनाए रखा जाता है। उसका इंजन ________ के बराबर है।
Which equation represents the Claudius theorem?
कौन सा समीकरण क्लॉडियस प्रमेय का प्रतिनिधित्व करता है?
Which law governs the
process of heat transfer?
ऊष्मा स्थानांतरण की प्रक्रिया को कौन सा नियम नियंत्रित करता है?
2500 kJ/min heat is supplied to a heat
engine at 1200 K. It rejects heat at 1500 kJ/min at 600 K. This type of engine
is ________ .
1200 K पर एक ऊष्मा इंजन को 2500 kJ/मिनट ऊष्मा की आपूर्ति की जाती है। यह 600 K पर 1500 kJ/मिनट की ऊष्मा को अस्वीकार कर देता है। इस प्रकार का इंजन ________ है।
If two engines E1 and E2
are working in the same temperature ranges. The E1 is a reversible engine, whereas E2 is an irreversible engine. Which of the following is
CORRECT for the efficiency of the engines?
यदि दो इंजन E1 और E2 समान तापमान रेंज में काम कर रहे हैं। E1 एक प्रतिवर्ती इंजन है, जबकि E2 एक अपरिवर्तनीय इंजन है। इंजन की दक्षता के लिए निम्नलिखित में से कौन सा सही है?
Which is the Correct
mathematical representation of the Kelvin-Plank statement?
केल्विन-प्लैंक कथन का सही गणितीय निरूपण कौन सा है?
A Carnot heat pump is used to maintain a
room at a temperature of 27o C, the initial temperature of the room
was -4o C the heat loss from the room is 20 kW. What is the power
requirement of the pump?
If a heat engine produces
work only by interacting with one source. What kind of machine is this?
यदि कोई ऊष्मा इंजन केवल एक स्रोत के साथ क्रिया करके कार्य उत्पन्न करता है, तो यह किस प्रकार की मशीन है?
Which of the following is
NOT a feature of Carnot engine?
If a Carnot engine rejects 
of the heat from the
reservoir, what is the efficiency of Carnot engine?
A Carnot engine operates between
temperature 1000 K and 400 K. The heat rejected by the first Carnot engine is
used by the second Carnot engine, whose sink temperature is 200 K. If the net
heat absorbed by the first Carnot engine is 200 MJ. What is the heat rejected
(in MJ) by the second Carnot engine?
Which of the following is incorrect for
reversible adiabatic process?
Which one of the following is the steady flow energy equation for a boiler?
A reversible engine, which
operates between temperature range of 1200 K and 600 K, rejects 30 % of heat to
the sink comes under the classification of?
एक प्रतिवर्ती इंजन, जो 1200 K और 600 K के तापमान रेंज के बीच संचालित होता है, सिंक में 30% ऊष्मा को अस्वीकार करता है, किस वर्गीकरण के अंतर्गत आता है?
Two Carnot engines are
connected in a series with working extreme temperatures as 2000 K and 200 K
respectively. What is the efficiency of the first Carnot engine (in %)?
दो कार्नोट इंजन क्रमशः 2000 K और 200 K के चरम तापमान पर एक श्रृंखला में जुड़े हुए हैं। पहले कार्नोट इंजन की दक्षता (% में) क्या है?
The first and second laws
of thermodynamics help to derive the following properties, respectively.
A Carnot engine operates between T1 and T2. If there is an increase in source temperature by t and decrease in sink temperature by t.
How the efficiency in both cases is related?
Which
equation represents the steady flow system?
Which of the below stated are properties of a PMM-2?
नीचे बताए गए में से कौन से PMM-2 के गुण हैं?
If two Carnot engine CE1 and CE2 are
connected in a series such that the heat rejected by CE1 is used as the input
for the CE2 cycle with the intermediate temperature being the geometric mean of
the extreme temperature. Which of the following statement is TRUE for this efficiency
of the Carnot engine?
A reversible engine operates between
temperature T1 and T2. The energy rejected by
this engine is received by a second reversible engine at temperature T2 and rejected to a reservoir
at temperatureT3. If the
efficiencies of the engines are same then, the relationship between T1,T2 and T3 is given by
What is the amount of maximum work that
can be extracted from a Carnot engine working between temperature 1000 K and
100 K?
A heat engine performs a
work of 100 kJ per cycle. The efficiency of the engine is 50 %. What will be
the amount of heat rejected (in kJ) per cycle?
What is the velocity of
steam (in m/sec) at exit across a steam whistle which is perfectly insulated
and does not perform any work and undergoes a drop of 0.2 kJ/kg in enthalpy
from entry to exit?
A Carnot engine rejects 30 % of absorbed
heat to a sink at 30o C. The temperature of the heat source is
Heat
engine working between the source at 200o C and rejects heat at 25o
C receives 5 kW of heat. Work done for this engine is equal to
0 kW. Does this satisfy the inequality of clauses?
If the heat rejected from the system is
zero, then which of the following statement will hold TRUE?
Clauses statement and Kelvin-Plank’s
statement are ________ .
A reversible engine operates between temperature
T1 and T2. The energy rejected by
this engine acts as an input for another reversible engine at temperature T3. What is the relation
between T1.T2 and T3?
Which equation defines the
enthalpy (h) of a system?
In Claudius theorem the
reversible path is substituted by ________ .
Steam
flow through a nozzle is considered as
Which of the relation
represents an irreversible and possible process?
Carnot cycle efficiency
depends upon
Calculate the enthalpy of 3 kg of fluid
that occupies a volume of 1.5 m3, if the internal energy is 3.5 M
Joules/kg and the pressure is 0.3 MN/m2.
A perpetual motion machine of the first
kind i.e. a machine which produces power without consuming any energy is ________.
An actual engine is to be designed
having same efficiency as the Carnot cycle. Such a proposition is ________.
A perpetual motion machine
is ________ .
What does the second law of
thermodynamics define?
An engine working between positive
temperatures ________ .
Kelvin Plank's law deals
with the ________ .
Which of the following is the correct
expression for the maximum thermal efficiency 
of a system undergoing
a reversible power cycle while operating between thermal reservoirs at
temperatures Tc and Th
Following
relationship defines the Gibb’s free energy G