TSEE MCQ part 8

21. Waste heat from the outgoing flue gases in a thermal power plant is recovered by a/an

(A) Economiser (B) Steam superheater (C) Air preheated (D) All (A), (B) and (C)

Answer: Option D

 

 

32. Which of the following is a periodic furnace?

(A) Tunnel kiln (B) Rotary kiln (C) Soaking pit (D) Reheating furnace

Answer: Option C

 

33. If fuel and air are mixed ahead of the burner, it is called a/an __________ burner.

(A) Premix (B) Outside mixing type (C) Rotary (D) Diffusion

Answer: Option A

 

34. Pulverized fuel fired furnaces employ __________ fuel firing.

(A) Horizontal (B) Vertical (C) Tangential (D) All (A), (B) and (C)

Answer: Option D

 

35. Heat balance of furnace provides means of determining the

(A) Thermal efficiency of the process (B) Sources of heat losses (C) Scope of reduction of heat losses

(D) All (A), (B) and (C)

Answer: Option D

 

40. Which is not a hearth furnace?

(A) Glass tank furnace (B) Open hearth furnace (C) Cupola (D) Reheating furnace

Answer: Option C

 

42. Combustion of fuel in a furnace with oxygen enriched air results in higher

(A) Flue gas volume (B) Flame temperature (C) Fuel consumption (D) Stack loss

Answer: Option B

 

43. Cement Kiln is a

(A) Rotary Kiln (B) Tunnel Kiln (C) Natural draft furnace (D) Batch furnace

Answer: Option A

 

44. Re-generators compared to the recuperators for the same duty

(A) Occupy more space (B) Are less costly

(C) Are of smaller size (D) All (A), (B) and (C)

Answer: Option A

 

59. Which is a regenerative furnace?

(A) Coke oven heating chamber

(B) Open hearth furnace

(C) Both (A) and (B)

(D) Neither (A) nor (B)

Answer: Option C

68. Air filtration in a furnace

(A) Reduces its thermal efficiency

(B) Is indicated by flame sting out

(C) Increases the flue gas temperature

(D) None of these

Answer: Option A

 

69. Blast furnace stoves are meant for heating

(A) Air (B) Blast furnace gas (C) Steam (D) None of these

Answer: Option A

 

102. While the fuel fired furnace can be used upto a maximum temperature of about 1700°C, the electric furnace can be used upto a temperature of about __________ °C.

(A) 2000 (B) 3000 (C) 4500 (D) 6000

Answer: Option C

 

103. Which of the following is a heat treatment furnace?

(A) Muffle furnace (B) Annealing furnace (C) Reheating furnace (D) Rotary kills

Answer: Option B

 

104. Rotary kilns are used in the

 (A) Calcination of limestone & dolomite (B) Cement manufacture (C) Both (A) and (B) (D) Neither (A) nor (B)

Answer: Option C