- (A) Blast furnace gas
- (B) Hydrogen
- (C) Acetylene
- (D) Coke oven gas
Exam preparation MCQs with answers
Practice Pakistan's most useful MCQs for competitive exams
Prepare for NTS, PPSC, FPSC and subject-wise tests with fresh multiple choice questions, clear options and quick answer reveal.
Latest MCQs
- (A) Carburetted water gas
- (B) Blast furnace gas
- (C) Natural gas
- (D) Producers’ gas
- (A) 10
- (B) 25
- (C) 45
- (D) 60
- (A) It is abrasive to the coal pulveriser (i.e. ball mill) and the combustion chamber
- (B) The ash in molten condition gets absorbed in the pores of the refractory lining of the furnace and causes its spalling due to different co-efficient of expansion/contraction of the refractory and the ash
- (C) The ash retains the sulphur & phosphorus and thus affects the quality of products in metallurgical furnace apart from increasing the slag volume. Besides, it may fuse and stick to the boiler tubes thereby reducing the heat transfer
- (D) All
- (A) Coke oven gas
- (B) Producer gas
- (C) Blast furnace gas
- (D) L.
- (A) Higher than
- (B) Lower than
- (C) Same as
- (D) Either
- (A) Low reactivity of carbonised residue containing high proportions of iron & sulphur
- (B) Low forced draught and fuel bed temperature
- (C) Thick fire bed and preheated primary air
- (D) All
- (A) Reduces its consumption in the furnace
- (B) Increases its consumption in the furnace
- (C) Does not affect its consumption in the furnace
- (D) Decreases its hardness and abrasion resistance
- (A) Lignite
- (B) Bituminous coal
- (C) Anthracite
- (D) High temperature coke (V.M < 0.5%)
- (A) Coke oven gas yield is more
- (B) Tar yield is less but free carbon in tar is more
- (C) Calorific value of coke oven gas is less
- (D) All
