Mechanical Engineering Archives

5321. A refrigeration system

[A]. removes heat from a low temperature body and delivers it to a high temperature body

[B]. removes heat from a high temperature body and delivers it to a low temperature body

[C]. rejects energy to a low temperature body

[D]. none of the above

✅ The correct answer is option A.

5322. While designing the refrigeration system of an aircraft, the prime consideration is that the

[A]. system has high C.O.P.

[B]. power per TR is low

[C]. mass of refrigerant circulated in the system is low

[D]. mass of the refrigeration equipment is low

✅ The correct answer is option D.

5323. In a hot chamber die casting machine

[A]. ferrous alloys with low melting temperature are casted

[B]. ferrous alloys with high melting temperature are casted

[C]. non-ferrous alloys with low melting temperature are casted

[D]. non-ferrous alloys with high melting temperature are casted

✅ The correct answer is option C.

5324. In aqua-ammonia and Lithium-bromide water absorption refrigeration systems, the refrigerants are respectively

[A]. water and water

[B]. water and lithium bromide

[C]. ammonia and lithium bromide

[D]. ammonia and water

✅ The correct answer is option D.

5325. The triangle law of forces states that if two forces acting simultaneously on a particle, be represented in magnitude and direction by the two sides of a triangle taken in order, then their resultant may be represented in magnitude and direction by the third side of a triangle, taken in opposite order.

[A]. True

[B]. False

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✅ The correct answer is option A.

5326. The type of organisation preferred for a steel industry, is

[A]. line organisation

[B]. functional organisation

[C]. line and staff organisation

[D]. line, staff and functional organisation

✅ The correct answer is option D.

5327. The reheat factor is the ratio of the

[A]. cumulative heat drop to the isentropic heat drop

[B]. isentropic heat drop to the heat supplied

[C]. total useful heat drop to the total isentropic heat drop

[D]. none of the above

✅ The correct answer is option A.

5328. In value engineering, the term value refers to

[A]. manufacturing cost of the product

[B]. selling price of the product

[C]. total cost of the product

[D]. utility of the product

✅ The correct answer is option D.

5329. Coefficient of resistance is the ratio of

[A]. actual velocity of jet at vena contracta to the theoretical velocity

[B]. area of jet at vena contracta to the area of orifice

[C]. loss of head in the orifice to the head of water available at the exit of the orifice

[D]. actual discharge through an orifice to the dieoretical discharge

✅ The correct answer is option C.

5330. The petrol engines are also known as

[A]. spark ignition (S.I.) engines

[B]. compression ignition (C.I.) engines

[C]. steam engines

[D]. none of these

✅ The correct answer is option A.