81. Which is the common coal firing the system used in Indian thermal power plants?
(A) Pulverized coal firing
(B) Stoker firing
(C) Fluidized bed
(D) Pressurized bed
Answer: - Pulverized coal firing
82. High-pressure boilers are always
(A) Bottom supported
(B) Top supported
(C) Can be supported from either
(D) None of the above
Answer: - Top supported
83. Minimum Boilerplate thickness specified in IBR 1950 is
(A) 1/4 inch
(B) 1/2 inch
(C) 3/8 inch
(D) 3/4 inch
Answer: - 1/4 inch
84. Rankine cycle efficiency of a good steam power plant may be in the range of
(A) 15 to 20%
(B) 35 to 45%
(C) 70 to 80%
(D) 90 to 95%
Answer: - 35 to 45%
85. Combustible elements in the fuel are
(A) Carbon and hydrogen
(B) Carbon, hydrogen, and Sulphur
(C) Carbon, hydrogen, and nitrogen
(D) Carbon, hydrogen, and ash
Answer: - Carbon, hydrogen, and Sulphur
86. Which of the following device is termed as boiler accessory?
(A) Safety valve
(B) Relief valve
(C) Steam Stop valve
(D) Superheater
Answer: - Superheater
87. The quantity of which boiler mounting is kept as more than one?
(A) Water level indicator
(B) Safety valve
(C) Fusible plug
(D) Both (A) & (B)
Answer: - Both (A) & (B)
88. Steel, paper, paints, and chemicals are examples of products that use
(A) batch production
(B) repetitive production.
(C) continuous production
(D) ma production.
Answer: - continuous production
89. The radiation pyrometers work on the principle of __________
(A) Newton’s law
(B) Stefan Boltzmann’s law
(C) Zeroth law
(D) None of the above
Answer: -Stefan Boltzmann’s law
90. Factor of safety is the ratio of __________
(A) working stress and ultimate strength
(B) yield strength and endurance strength
(C) ultimate strength and yield strength
(D) yield strength and working stress
Answer: - yield strength and working stress
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