Objective Questions on Boiler Mountings and Accessories

Objective Questions on Boiler Mountings and Accessories

1-The amount of air required for complete combustion of fuel is called:

(A) Excess air

(B) Free air

(C) Stoichiometric air

(D) None of the above

 

2-C+O2 CO2, Therefore 1kg of carbon requires how much kg of oxygen?

(A) 1.67

(B) 2.67

(C) 3.67

(D) 4.67

 

3-Mechanical equivalent of heat is related to:

(A) Conservation of mass

(B) Conservation of energy

(C) Conservation of momentum

(D) None of the above

 

4-The localized corrosion caused by oxygen in boilers is called:

(A) Scaling

(B) Pitting

(C) Erosion

(D) None of the above

 

5-Which of the following equipment is used for boiling water treatment?

(A) Pyrometer

(B) Dearater

(C) Hydrometer

(D) None of the above

 

6-What is the recommended hardness of boiler feed water?

(A) Less than 5 ppm

(B) Greater than 5 ppm

(C) Greater than 1 ppm

(D) Less than 1 ppm

 

7-If steam water content is 5%, its dryness fraction is:

(A) 95%

(B) 0%

(C) 5%

(D) None of these

 

8-The energy content of steam is called:

(A) Entropy

(B) Density

(C) Specific volume

(D) Enthalpy

 

9-Only throttling calorimeter is used for measuring:

(A) Very low dryness fraction upto 0.7

(B) Very high dryness fraction upto 0.98

(C) Dryness fraction of only low pressure steam

(D) Dryness fraction of only high pressure steam

 

10-Air at 20°C and 101.325 kpa is called:

(A) STP

(B) NTP

(C) ISA

(D) SATP

 

ANSWERS:

1-(D), 2-(B), 3-(B), 4-(B), 5-(B), 6-(D), 7-(A), 8-(D), 9-(B), 10-(B)