11. The forced circulation of water does not take place in
La-Mont boiler
Lancashire boiler
Velox boiler
Benson boiler
✅ The correct answer is option B.
Steam Boilers and Engines MCQs
12. A __________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit.
blow off cock
fusible plug
stop valve
safety valve
✅ The correct answer is option B.
13. The working pressure range for a La-Mont boiler is
0.5 to 10 MN/m2
1 to 15 MN/m2
2.5 to 15 MN/m2
3.5 to 20 MN/m2
✅ The correct answer is option D.
14. When the speed of the engine is controlled by means of a valve in a steam pipe, which regulates the pressure of steam entering the engine, then the governing is known as
throttle governing
cut-off governing
by-pass governing
none of these
✅ The correct answer is option A.
15. A good steam boiler is one which produces maximum quantity of steam with the given fuel
Agree
Disagree
✅ The correct answer is option A.
16. The ratio of brake power to the indicated power is known as
mechanical efficiency
overall efficiency
indicated thermal efficiency
brake thermal efficien
✅ The correct answer is option A.
17. For maximum discharge through a chimney, the condition is that height of hot gas column producing the draught should be
one-half the height of chimney
equal to the height of chimney
two times the height of chimney
four times the height
✅ The correct answer is option B.
18. The diagram factor is the ratio of the
area of the actual indicator diagram to the area of theoretical indicator diagram
actual workdone per stroke to the theoretical workdone per stroke
actual mean effective pressure to the theoretical mean effective pressure
any one of the above
✅ The correct answer is option D.
19. The mechanical draught produces more draught than natural draught.
TRUE
FALSE
✅ The correct answer is option A.
20. Blow off cock in a boiler is used to
control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required
empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler
put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit
increase the temperatu
✅ The correct answer is option B.