What is the significance of the term “ σ ” in the given Fritz Equation used to calculate bubble departure diameter? D = Cd β ½

If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference toi) altitude bubble on index frameii) altitude bubble on index frame if it is to be used as a leveliii) altitude bubble on telescopeiv) altitude bubble on telescope if it is to be used as a level The correct answer is

A

only (i)

B

both (i) and (iv)

C

only (iii)

D

both (ii) and (iii)

If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference to
i) altitude bubble on index frame
ii) altitude bubble on index frame if it is to be used as a level
iii) altitude bubble on telescope
iv) altitude bubble on telescope if it is to be used as a level
The correct answer is

A

only (i)

B

both (i) and (iv)

C

only (iii)

D

both (ii) and (iii)

Which one of the following is the correct representation of Fritz equation which is used to calculate bubble diameter in bubble pool boiling? ½ b) D = Cd β ½ c) D = Cd β 2 d) D = Cd β

A

D = Cd β ½

B

2 σ/g (pt – pv)

C

2 σ/g (pt – pv)

D

2 σ/g (pt – pv)

The Fritz equation to calculate the bubble diameter is given by – D = Cd β ½ What is the value of the constant Cd for water bubbles at 1atm?

A

½ What is the value of the constant Cd for water bubbles at 1atm? ] 0.0148

B

2 σ/g (ϸL – ϸV )

C

2 σ/g (ϸL – ϸV )

D

2 σ/g (ϸL – ϸV )

The question below consists of a set of labelled sentences. These sentences, when properly sequenced form a coherent paragraph. Select the most logical order of sentences from among the options. P: A person is just like a bubble. Q: The air has reclaimed it; the atmosphere has reclaimed it. R: This bubble doesn’t have any substance of its own, just like every other creature. S: But when the bubble bursts, the substance that is inside the bubble, where is it?

A

PRSQ

B

RSQP

C

SQPR

D

QPSR

The bubble diameter at the time of detachment from the surface can be worked out from the relation proposed by Fritz and is given by . b) C d β 3/2 c) C d β 1/2 d) C d β 5/2

A

C d β .

B

2 σ/g (p t – p v)

C

2 σ/g (p t – p v)

D

2 σ/g (p t – p v)

The bubble diameter has been expressed by Fritz as 1/2 b) D b = C d β 3/2 c) D b = C d β 5/2 d) D b = C d β 7/2

A

D b = C d β 1/2

B

2 σ/g (p f – p g)

C

2 σ/g (p f – p g)

D

2 σ/g (p f – p g)

A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, theni) the ball will move to the frontii) the bubble will move to the frontiii) the ball will move to the reariv) the bubble will move to the rear Find out which of the above statements are correct ?

A

(i) and (ii)

B

(i) and (iv)

C

(ii) and (iii)

D

(iii) and (iv)

A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, then
i) the ball will move to the front
ii) the bubble will move to the front
iii) the ball will move to the rear
iv) the bubble will move to the rear
Find out which of the above statements are correct ?

A

(i) and (ii)

B

(i) and (iv)

C

(ii) and (iii)

D

(iii) and (iv)

Match the items of List - II with the items of List - I and select the code of correct matching List - I List - II (a) Chi-square Test (i) Testing the significance of the differences of the mean values among more than two sample groups. (b) ANOVA (F-test) (ii) Testing the goodness of fit of a distribution (c) Z - test (iii) Testing the significance of the difference of the mean values between two large sized samples (d) t - test (iv) Testing the significance of the difference of the mean values between two small sized samples when population standard deviation is not available

A

(a) - (i), (b) - (ii), (c) - (iii), (d) - (iv)

B

(a) - (iv), (b) - (iii), (b) - (ii), (d) - (i)

C

(a) - (i), (b) - (ii), (c) - (iv), (d) - (iii)

D

(a) - (ii), (b) - (i), (c) - (iii), (d) - (iv)

What is the significance of the term “ σ ” in the given Fritz Equation used to calculate bubble departure diameter? D = Cd β ½

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