Fire tube boilers are those in which__________________?
(A) flue gases pass through tubes and water around it
(B) water passes through the tubes and flue gases around it
(C) forced circulation takes place
(D) tubes are laid vertically
(D) none of the above
The number of flue tubes in Lancashire boiler is_________________?
(A) zero
(B) one
(C) two
(D) four
(D) many
Which of the following is a water tube boiler_________________?
(A) locomotive boiler
(B) Cochran boiler
(C) Cornish boiler
(D) Babcock and Wilcox boiler
(D) Lancashire boiler
A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are________________?
(A) supplied by same manufacturer loose and assembled at site
(B) supplied mounted on a single base
(C) purchased from several parties and packed together at site
(D) packaged boiler does not exist
(D) none of the above
Which of the following coals has the highest calorific value_________________?
(A) anthracite coal
(B) bituminous coal
(C) lignite
(D) peat
(D) wood
The crown of the fire box is made hemispherical in order to___________________?
(A) give maximum space
(B) give maximum strength
(C) withstand pressure inside boiler ,
(D) resist intense heat in fire box
(D) enable easy,manufacture
The fire tubes in, a Coarran and Scotish marine boiler are_________________?
(A) horizontal
(B) vertical
(C) inclined
(D) both horizontal and vertical
(D) horizontal and inclined
The basic purpose of drum in boiler is to_____________________?
(A) serve as storage of steam
(B) serve as storage of feed water for water wall
(C) remove salts from water
(D) separate steam from water
(D) control level
Mechanical equivalent of heat for 1 kcal or Joule’s equivalent is equal to_________________?
(A) 421 kgm
(B) 421 kgm
(C) 539 kgm
(D) 102 kgm
(D) 75 kgm
The evaporation of 15.653 kg of water per hour from and at 100°C is called_________________?
(A) evaporative capacity
(B) factor of evaporation
(C) equivalent evaporation
(D) one boiler h.p.
(D) boiler efficiency