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HIGH PRESSURE BOILERS MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

Byadmin

HIGH PRESSURE BOILERS

MULTIPLE CHOICE QUESTIONS

(MCQ) WITH ANSWERS

MCQ are very helpful for increasing

understanding of the boilers. These

also increase the level of clarity.

Ultimately these help in the design

and safe working of boilers.

  1. The steam capacity of high pressure boilers are in the range

  1. 100 to 500 Tons/h

  2. 10 to 135 Tons/h

  3. 30 to 650 Tons/h

  4. None

ANS: (c )

  1. Maximum pressure in high pressure boilers is

  1. 125

  2. !60

  3. 185

  4. None

ANS: (b)

  1. Maximum temperature in high pressure boilers is

  1. 5400C

  2. 6400C

  3. 7400C

  4. None

ANS: (a)

  1. The circulation of water in high pressure boilers is by

  1. Free circulation

  2. Forced circulation

  3. Free & forced circulation

  4. None

ANS: (b)

  1. In a water tube boiler, water passes through

  1. Tubes and hot gases surround these

  2. Drum and hot gases passes through tubes

  3. Tubes and hot gases also pass through another set of tubes

  4. None

ANS: (a)

  1. In a gas tube boiler, hot gases passes through

  1. Tubes and water surround these

  2. Drum and water passes through tubes

  3. Tubes and water also pass through another set of tubes

  4. None

ANS: (a)

  1. High pressure boilers need

  1. More floor space

  2. Less floor space

  3. Not known

  4. None

ANS: (b)

  1. Scale formation in water tube boilers is

  1. Less

  2. More

  3. Less & more

  4. None

ANS: (a)

  1. In water tube boilers, steam drum required are

  1. More

  2. Less

  3. Not known

  4. None

ANS: (b)

  1. In water tube boilers, chances are overheating are

  1. More

  2. Less

  3. Medium

  4. None

ANS: (b)

  1. In water tube boilers, large number of tubes used are of

  1. Bigger diameter

  2. Smaller diameter

  3. Smaller & bigger diameters

  4. None

ANS: (b)

  1. The efficiency of a steam thermal plant is increases by using high pressure steam at

  1. High temperature

  2. Low temperature

  3. High & low temperature

  4. None

ANS: a)

  1. In high pressure boilers, combustion used is

  1. Pressurized

  2. Non-pressurized

  3. Pressurized & non-pressurized

  4. None

ANS: (a)

  1. A La Mount boiler are

  1. 100 bar & 4000C

  2. 140 bar & 5000C

  3. 120 bar & 5000C

  4. None

ANS: (c )

  1. A sub-critical boiler has pressure and temperatures of

  1. 125 bar & 5100C

  2. 300 bar & 6000C

  3. 200 bar & 5100C

  4. None

ANS: (a)

  1. An economizer in a boiler reduces fuel consumption by

  1. Heating flue gases

  2. Heating feed water

  3. Heats both water & flue gases

  4. None

ANS: (b)

  1. Heat supplied to feed water in economizer is

  1. Latent heat

  2. Sensible heat

  3. Sensible & latent heat

  4. None

ANS: (b)

  1.  Economizer heats feed water with

  1. Waste steam

  2. Waste hot gases

  3. Both waste steam and hot gases

  4. None

ANS: (b)

  1. Thermal efficiency of a high pressure boilers increase due to economizer by

  1. 10 to 20 %

  2. 20 to 30 %

  3. 30 to 40 %

  4. None

ANS: (d)

  1. Super critical boilers have pressure and temperature

  1. 400 bar & 6000C

  2. 200 bar & 5000C

  3. 300 bar & 6000C

  4. None

ANS: (c )

  1. Mountings on a Boiler ensure

  1. Safety of the boiler

  2. Increase the efficiency of the boiler

  3. Increase efficiency and safety of the boiler

  4. None

ANS: (a)

  1. Which of the followings are boiler accessories

  1. Feed check valve & preheater

  2. Feed check valve & man hole

  3. Pre-heater & economizer

  4. None

ANS: (c)

  1. Which of the followings are boiler mountings?

  1. Feed check valve & preheater

  2. Feed check valve & man hole

  3. Pre-heater & economizer

  4. None

ANS: (b)

  1. Components which increase the efficiency of a boiler are

  1.  Accessories & mountings

  2. Boiler accessories

  3.  Mountings o a boiler

  4. None

ANS: (b)

  1. A steam trap

  1. Super heats the steam

  2. Heats the feed water

  3. Traps steam and allow the water go to turbine

  4. None

ANS: (d)

  1. A blow off cock in a steam boiler operates when

  1. Water level falls below a minimum level

  2. No superheating of steam

  3. Hot gases are coming more than requirement

  4. None

ANS: (a)

  1. A blow off cock increases

  1.  The efficiency of the boiler

  2.   Safety of the boiler

  3. Increases both efficiency & safety of the boiler

  4. None

ANS: (b)

https://www.mesubjects.net/wp-admin/post.php?post=6894&action=edit   Ste Engine & Turbine

https://www.mesubjects.net/wp-admin/post.php?post=6243&action=edit          MCQ Steam

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