411. Which of the following gives the correct sequence of flow of the flue gases through the above mentioned boiler accessories ?
A. A, C, B, D
B. D, B, C, A
C. D, C, B, A
D. D, A, B, C

412. Induced draft fans provided in large thermal power plant boilers have __________________ blades?
A. Forward curved
B. Backward curved
C. Double curved
D. Radial or straight

413. In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.) ?
A. t = 15 – 0.0065 h
B. t = 15 + 0.0065 h
C. t = 0.0035 h – 15
D. t = 15 – 0.0035 h

414. Work done by a/an _________________ process is determined by ∫p. dv ?
A. Adiabatic
B. Quasi-static
C. Isothermal
D. Isentropic

415. Use of economizer in a boiler plant reduces the fuel consumption for steam generation by about _______________ percent ?
A. 1
B. 10
C. 30
D. 50

416. The refractory brick which has good thermal shock resistance at high temperature but cracks on cooling below 400°C is__________________?
A. Magnesite
B. Chrome
C. Silica
D. Fireclay

417. ______________________ temperature remains constant during adiabatic saturation process of unsaturated air ?
A. Dew point
B. Dry bulb
C. Wet bulb
D. None of these

418. Resilience of a bolt can be increased by increasing its __________________?
A. Length
B. Shank diameter
C. Head diameter
D. None of these

419. Maximum permissible air velocity in pipelines is about ______________ metre/second ?
A. 5
B. 10
C. 20
D. 40

420. Which of the following is not the commercial name of poly-methyl-methacrylate (PMMA) ?
A. Styrofoam
B. Lucite
C. Perspex
D. Plexiglass

NOTE
IF YOU THINK ANY OF THE MCQ ABOVE IS WRONG.
PLEASE COMMENT WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION IN COMMENT BOX.
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