Mechanical Engineering Mcqs

A) Tonnes/hr. of steam

B) Pressure of steam in kg/cm2

C) Temperature of steam in °C

D) All of the above

A) Same

B) More

C) Less

D) Less or more depending on size of boiler

A) Temperature, time, and turbulence

B) Total air, true fuel, and turbulence

C) Thorough mixing, total air, and temperature

D) Total air, time, and temperature

A) Same value

B) Higher value

C) Lower value

D) Lower/higher depending on steam flow

A) Heated sufficiently

B) Burnt in excess air

C) Heated to its ignition point

D) Burnt as powder

A) Causing clinkering and slagging

B) Corroding air heaters

C) Spontaneous combustion during coal storage

D) All of the above

A) Prevent the bulging of flat surfaces

B) Avoid explosion in furnace

C) Prevent leakage of hot flue gases

D) Support furnace freely from top

A) Increases steam pressure

B) Increases steam flow

C) Decreases fuel consumption

D) Decreases steam pressure

A) Induced draft fan

B) Smoke meter

C) Chimney

D) Precipitator

A) Chimney

B) Induced draft fan

C) Both A and B

D) Steam jet draught