Steam and Gas Power Systems - - Unit 3 - Week 2 https://onlinecourses-archive.nptel.ac.in/noc19...
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Unit 3 - Week 2
Register for Certification exam Assignment 2
The due date for submitting this assignment has passed. Due on 2019-03-13, 23:59 IST. Course outline As per our records you have not submitted this assignment.
How to access the 1) The critical pressure of water at which latent heat of vaporization is zero is 1 point portal 225.65 kgf/cm2 Week 1 273 kgf/cm2
Week 2 100 kgf/cm2
2 Steam Generators 1 kgf/cm
Fire Tube Boilers No, the answer is incorrect. Score: 0 Water Tube Boilers Accepted Answers: Boiler Mountings 225.65 kgf/cm2 and Accessories 2) Select the odd one out 1 point High Pressure Boilers (Part-1) fusible plug and economizer Quiz : Assignment 2 economizer and superheater
Solution : spring loaded dead weight and water level indicator Assignment-02 fusible plug and water level indicator
Week 3 No, the answer is incorrect. Score: 0 Week 4 Accepted Answers: fusible plug and economizer Week 5 3) The relative efficiency is defined as 1 point Week 6 ratio of thermal efficiency to rankine efficiency Week 7 ratio of brake power to the indicated power
Week 8 ratio of heat equivalent to indicated power to the energy supplied in steam
product of thermal efficiency & Rankine efficiency DOWNLOAD VIDEOS No, the answer is incorrect. Score: 0 Accepted Answers: ratio of thermal efficiency to rankine efficiency
4) The diameter of flue tube in a Cornish boiler is ______that of the shell 1 point
3/5
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1 of 4 Thursday 20 June 2019 06:09 PM Steam and Gas Power Systems - - Unit 3 - Week 2 https://onlinecourses-archive.nptel.ac.in/noc19...
Accepted Answers: 3/5
5) Which of the following is not an advantage of a fire-tube boiler? 1 point
low first cost
reliability in operation
more draught required
quick response to load changes
No, the answer is incorrect. Score: 0 Accepted Answers: more draught required
6) Which of the following is not a boiler mounting? 1 point
Fusible plug
Blowdown valve
Water level indicator
Preheater
No, the answer is incorrect. Score: 0 Accepted Answers: Preheater
7) What is the function of fusible plug in the boiler? 1 point
Protect the fire tube
To trip on overload
To act as a junction switch
To maintain pressure
No, the answer is incorrect. Score: 0 Accepted Answers: Protect the fire tube
8) Maximum operating pressure of stirling boiler is 1 point
upto 60 bar
65-80 bar
85-100 bar
more than 100 bar
No, the answer is incorrect. Score: 0 Accepted Answers: upto 60 bar
9) What is the function of safety valves in the boiler? 1 point
To prevent excessive air pressure
To prevent water pressure
To prevent from rising temperatures
To prevent excessive steam pressure
No, the answer is incorrect. Score: 0 Accepted Answers: To prevent excessive steam pressure
10)Which of the followings are type of fire tube boiler? 1 point
Both Lancashire and Cochran boiler
2 of 4 Thursday 20 June 2019 06:09 PM Steam and Gas Power Systems - - Unit 3 - Week 2 https://onlinecourses-archive.nptel.ac.in/noc19...
Both Cochran and package boiler
both Babcock & Wilcox and Cornish boiler
both Cornish and Stirling boiler
No, the answer is incorrect. Score: 0 Accepted Answers: Both Lancashire and Cochran boiler
11)Where is steam separator installed in the boiler? 1 point
Close to the economizer
Close to the engine
Close air preheater
Near to the superheater
No, the answer is incorrect. Score: 0 Accepted Answers: Close to the engine
12)Match the following 1 point
1-A; 2-B; 3-C
1-C; 2-B; 3-A
1-A; 2-C; 3-B
1-B; 2-A; 3-C
No, the answer is incorrect. Score: 0 Accepted Answers: 1-C; 2-B; 3-A
13)Lancashire boiler has _____ internal flue tubes 1 point
1
3
2
4
No, the answer is incorrect. Score: 0 Accepted Answers: 2
14)The power of a boiler may be defined as 1 point
the amount of water evaporated or steam produced in kg per kg of fuel burnt
the ratio of heat actually used in producing the steam to the heat liberated in the furnace
the evaporation of 15.653 kg of water per hour from and at 100° C
the amount of water evaporated from and at 100° C into dry and saturated steam
No, the answer is incorrect. Score: 0 Accepted Answers: the amount of water evaporated or steam produced in kg per kg of fuel burnt
15)The equivalent evaporation is defined as 1 point
the ratio of heat actually used in producing the steam to the heat liberated in the furnace
3 of 4 Thursday 20 June 2019 06:09 PM Steam and Gas Power Systems - - Unit 3 - Week 2 https://onlinecourses-archive.nptel.ac.in/noc19...
the amount of water evaporated or steam produced in kg of fuel burnt
the amount of water evaporated from and at 100° C into dry & saturated steam
the amount of steam producing in per kg of fuel burnt
No, the answer is incorrect. Score: 0 Accepted Answers: the amount of water evaporated from and at 100° C into dry & saturated steam
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