Related Questions

In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.
A Equal to
B Less than
C More than
D None of these
STP-তে একটি আদর্শ গ্যাসকে প্রথমে তার প্রাথমিক আয়তনের এক-তৃতীয়াংশে সংকুচিত করা হয়, এবং তারপর প্রসারিত হতে দেওয়া হয় যতক্ষণ না তার চাপ প্রাথমিক চাপের অর্ধেক হয়। উভয় প্রক্রিয়ায় গ্যাসের তাপমাত্রা স্থির থাকে। যদি গ্যাসের প্রাথমিক অভ্যন্তরীণ শক্তি । হয়ে থাকে তাহলে এর চূড়ান্ত অভ্যন্তরীণ শক্তি কত? (An ideal gas at STP is first compressed to one-third of its initial volume and then allowed to expand until its pressure is half the initial pressure. The temperature of the gas remains constant during both the processes. If the initial internal energy of the gas is U, what is its final internal energy?)
A U/3
B U/2
C U
D 2U/3
In compressed air tunnelling, the volume of free air provided is
A 6 m3 per second per m2 of face area
B 6 m3 per minute per m2 of face area
C 20 m3 per minute per m2 of face area
D 6 m3 per hour per m2 of face area
Even though heat transfer co-efficients in boiling liquids is large, use of fins is advantageous, when the entire surface is exposed to __________ boiling.
A Film
B Nucleate
C Transition
D All of the above
In closed cycle gas turbine, the air is compressed
A Isothermally
B Isentropically
C Polytropically
D None of these
To avoid moisture troubles, the compressed air main line should
A Rise gradually towards the point of use
B Drop gradually towards the point of use
C Be laid vertically
D Be laid exactly horizontally
In a closed cycle gas turbine, the air is compressed
A Isothermally
B Polytropically
C Isentropically
D None of these
In a double acting compressor, the air is compressed
A In one cylinder
B In two cylinders
C In a single cylinder on both sides of the piston
D In two cylinders on both sides of the piston
The overall efficiency of the compressed air system is the
A Ratio of shaft output of the air motor to the shaft input to the compressor
B Ratio of shaft input to the compressor to the shaft output of air motor
C Product of shaft output of air motor and shaft input to the compressor
D None of the above
In a turbo jet engine, subsequent to heat addition to compressed air, to get the power output, the working substance is expanded in
A Exit nozzle, which is a constant volume process
B Exit nozzle, which is essentially an isentropic process
C Turbine blades, which is a constant volume process
D Turbine blades, which is essentially an isentropic process

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