steam boilers engines nozzles and turbines MCQs – Page 5

Practise focused steam boilers engines nozzles and turbines questions with marked answers for exam preparation and subject revision.

steam boilers engines nozzles and turbines Mcqs

81. The crown of the fire box is made hemispherical in order to___________________?
0

A. withstand pressure inside boiler ,

B. enable easy,manufacture

C. give maximum space

D. resist intense heat in fire box

E. give maximum strength

82. Alkaline pyrogallate is used in Orsats apparatus for absorption of _________________?
0

A. 02

B. N2

C. C02

D. none of the above

E. CO

83. The latent heat of steam at pressures greater than atmospheric in comparison to latent heat at atmospheric pressure is__________________?
0

A. more

B. equal

C. less

D. may be less or more depending on temperature

E. unpredictable

84. The state of vapour under saturation condition is described by_______________?
0

A. dryness fraction alone

B. pressure alone

C. temperature alone

D. pressure and temperature

E. pressure and dryness fraction

85. Heating of dry steam above saturation temperature is known as_____________________?
0

A. enthalpy

B. latent heat

C. superheating

D. supersaturation

E. super tempering

86. Fire tube boilers are those in which__________________?
0

A. tubes are laid vertically

B. water passes through the tubes and flue gases around it

C. none of the above

D. forced circulation takes place

E. flue gases pass through tubes and water around it

87. Lancashire boiler is of____________________?
0

A. all of the above

B. stationary<fire tube-type

C. natural cirulation type

D. horizontal type

E. internally fired type

88. In accelerated circulation type boiler________________?
0

A. water is converted into steam in one pass without any recirculation

B. feed pump is employed to supplement natural circulation in water wall type furnace

C. water is supplied in drum and through downcomers located in atmospheric conditon it passes to the water wall and rises to durm in the from of mixture of water and steam

D. heating takes place at bottom and the water supplied at bottom gets converted into the mixture of stdam bubbles and hot water which rise to durm

E. water is fed under high pressure and high velocity

89. Water and sediment in fuel oil can be removed by _______________________?
0

A. cooling the oil in the settling tanks

B. burning the oil

C. heating the oil in the settling tanks

D. suspension

E. filtering

90. Which type of boiler can meet rapid changes of load____________________?
0

A. vertical fire tube type

B. forced circulation type

C. horizontal fire tube type

D. horizontal water tube type

E. vertical water tube type

91. The balanced draft furnace is one using _________________________?
0

A. induced draft fan and forced draft fan

B. any one of the above

C. none of the above

D. forced draft fan and chimney

E. induced draft fan and chimney

92. Boiler parameters are expressed by ___________________?
0

A. all of the above

B. none of the above

C. temperature of steam in C

D. tonnes/hr. of steam

E. pressure of steam in kg/cm2

93. With increase in load, radiant super heater has____________________?
0

A. flat characteristic

B. lihear characterisstic

C. none of the above

D. drooping characteristic

E. rising characteristic

94. A safety valve in a locomotive starts leaking. The leaking medium will be_________________?
0

A. water

B. dry steam

C. supersaturated steam

D. wet steam

E. super heated steam

95. It is required to produce large amount of steam at low pressure. Which boiler should be used ?
0

A. lancashire boiler

B. babcock and wilcox boiler

C. cochran boiler

D. stoker fired boiler

E. pulverised fuel fired boiler

96. The feed check valve is used in order to ______________________?
0

A. check level of water in boiler drum

B. allow high pressure feed water to flow to drum and not allow reverse flow to take place

C. recirculate unwanted feed water

D. none of the above

E. regulate flow of boiler water

97. In which of the following boilers, the draught in furnace is increased by utilising exhaust steam from engine__________________?
0

A. locomotive boiler

B. babcock and wilcox boiler

C. benson boiler

D. cochran boiler

E. lancashire boiler

98. In a recuperative air preheater, the heat is transferred____________________?
0

A. heat is transferred by bleeding some gases from furnace

B. from heating an itermediate material and then heating the air from this material

C. from a metal wall from one medium to another

D. none of the above

E. by direct mixing ,

99. The pressure at which latent heat of vaporisation of water is zero, is_________________?
0

A. 1 kg/cm2

B. 100 kg/cm2

C. 170 kg/cm2

D. 225.6 kg/cm2

E. below atmospheric pressure

100. Pick up wrong statement about desired properties of a good fuel__________________?
0

A. high calorific value

B. ecomomical

C. ease in storing

D. high ignition point

E. produce minimum smoke and gases

Previous Next

Showing 81 to 100 of 194 mcqs