Mechanical Engineering Mcqs

A) Corrosion

B) Scale

C) Carryover

D) All of the above

A) Very low pressure

B) Atmospheric pressures

C) Medium pressures

D) Very high pressures

A) Increases

B) Decreases

C) Remains constant

D) May increase or decrease depending upon the method of storage

A) Supply of excess, air

B) Supply of excess coal

C) Burning CO and unburnts in upper zone of furnace by supplying more air

D) Fuel bed firing

A) Dry

B) Wet

C) Saturated

D)Supersaturated

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