DMRC Mechanical Engineering Paper-1 2016

Instructions

For the following questions answer them individually

Question 71

If the thermal efficiency of a Carnot heat engine is 40%, then Co-efficient of performance of a refrigerator working with in same temperature limits would be:

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Question 72

A heat engine is supplied with 280 KJ/s of heat at a constant fixed temperature of 520 K and heat rejection takes place at 260 K temperature. If the engine is
reversible, the heat rejected would be approximately equal to:

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Question 73

An engine operate between temperature limits of 900 K and T2, and an other engine operates between T2 and 400 K. For both engines to be equally efficient, T2 should be equal to:

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Question 74

Two car A and B moves at 54 Km/hr in the same direction and the car B is 300 m a head of car A. If the car A is accelerated at 6m/s2 while car B continue to move with the same velocity, calculate the time taken by car A to overtake car B:

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Question 75

Draft is provided in pattern so that:

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Question 76

Arc blow is:

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Question 77

A simply supported beam of span l and carrying uniform distributed load w per unit length, then maximum bending moment is given by:

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Question 78

In an arc welding:

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Question 79

The point of contraflexture in a loaded beam refers to the section where:

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Question 80

Which of the following fitting is a boiler mounting?

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