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The brake power of a diesel engine, keeping other parameters constant, can be increased by

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Question: The brake power of a diesel engine, keeping other parameters constant, can be increased by
[A].

decreasing the density of intake air

[B].

increasing the temperature of intake air

[C].

increasing the pressure of intake air

[D].

decreasing the pressure of intake air

Answer: Option C

Explanation:

No answer description available for this question.

The brake power (B.P.) of the engine is given by (where W = Brake load or dead load in newtons, l = Length of arm in metres, N = Speed of engine in r.p.m., S – Spring balance reading in newtons, D = Dia. of brake drum in metres, and d = Dia. of rope in metres)

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Question: The brake power (B.P.) of the engine is given by (where W = Brake load or dead load in newtons, l = Length of arm in metres, N = Speed of engine in r.p.m., S – Spring balance reading in newtons, D = Dia. of brake drum in metres, and d = Dia. of rope in metres)
[A].

[B].

[C].

[D].

all of these

Answer: Option D

Explanation:

No answer description available for this question.

Number of working strokes per min. for a four stroke cycle engine are __________ the speed of the engine in r.p.m.

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Question: Number of working strokes per min. for a four stroke cycle engine are __________ the speed of the engine in r.p.m.
[A].

equal to

[B].

one-half

[C].

twice

[D].

four-times

Answer: Option B

Explanation:

No answer description available for this question.

Number of working strokes per min. for a two stroke cycle engine are __________ the speed of the engine in r.p.m.

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Question: Number of working strokes per min. for a two stroke cycle engine are __________ the speed of the engine in r.p.m.
[A].

equal to

[B].

one-half

[C].

twice

[D].

four-times

Answer: Option A

Explanation:

No answer description available for this question.

Which of the following statement is correct regarding normal cetaine?

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Question: Which of the following statement is correct regarding normal cetaine?
[A].

It is a standard fuel used for knock rating of diesel engines.

[B].

Its chemical name is normal-hexadecane.

[C].

It has long carbon chain structure.

[D].

all ofthe above

Answer: Option D

Explanation:

No answer description available for this question.

Detonation is harmful due to

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Question: Detonation is harmful due to
[A].

increase in the rate of heat transfer, there is a reduction in the power output and efficiency of the engine

[B].

excessive turbulence which removes most of the insulating gas boundary layer from the cylinder walls

[C].

high intensity of knock causes crankshaft vibration and the engine runs rough

[D].

none of the above

Answer: Option D

Explanation:

No answer description available for this question.

One of the warmest winters on record has put consumers in the mood to spend money. Spending is likely to be the strongest in thirteen years. During the month of February, sales of existing single-family homes hit an annual record rate of 4.75 million. This paragraph best supports the statement that

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Question: One of the warmest winters on record has put consumers in the mood to spend money. Spending is likely to be the strongest in thirteen years. During the month of February, sales of existing single-family homes hit an annual record rate of 4.75 million.
This paragraph best supports the statement that
[A].

consumer spending will be higher thirteen years from now than it is today.

[B].

more people buy houses in the month of February than in any other month.

[C].

during the winter months, the prices of single-family homes are the lowest.

[D].

there were about 4 million homes for sale during the month of February.

Answer: Option E

Explanation:

This is clearly the best answer because the paragraph directly states that warm weather affects consumers inclination to spend. It furthers states that the sales of single-family homes was at an all-time high. There is no support for choice a or c. Choice b is wrong because even though there were high sales for a particular February, this does not mean that sales are not higher in other months. Choice d presents a misleading figure of 4 million. The paragraph states that the record of 4.75 million was at an annual, not a monthly, rate.