43.

44.

45.

46.

47.

48.

49.

The equation of a stream line in a two-dimensional flow is given by :

(A) dx _ dy (B) dy _ dx
14 0 14 0
‏م‎ =, ५४ @ -८ = 7
dt dt dx 0

It is required to measure the velocity of air with density equal to 1.2 kg/m* using a pitot tube
(coefficient = 1). If the head difference in a vertical U tube fitted with water is 12 mm, then
the approximate velocity of air in m/s is:

(A) 5 ms (®) 10 m/s

(C) 14m/s (D) 20 m/s

A similar model of a pump is built to a ratio of 1:2. If the model pumps the same fluid as the
prototype at the same rotation speed, the ratio of model power to prototype power input is :

1 1
(A) 39 (B) ನಗ

1 1
¢^ = D) ——
(©) 8 (D) ಇಗ

The time taken to drill a hole through a 25 mm thick plate with the drill rotating at 100 rpm
and moving at a feed rate of 0.25 mm/rev is:

(A) 30s (B) 100s
(C) 50s (D) 60s

Among the following Non-destructive testing methods, which method would be used to
examine a completed weld for surface defects?

(^) Ultrasonics (B) Radiography
(C) Dye-penetrant ൯) Acoustics

Which one of the following is the composition of 18-4-1 high-speed steel?
(^) 18 percent chromium, 4 percent nickel and 1 percent vanadium
(B) 18 percent tungsten, 4 percent chromium and 1 percent vanadium
(0) 18 percent tungsten, 4 percent nickel and 1 percent molybdenum

(0) 18 percent tungsten, 4 percent nickel and 1 percent vanadium

Which one of the following is Scab?
(൧) Sand casting defect (B) Welding defect
(C) Machining defect (0) Forging defect

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