GATE 1991 Mechanical Engineering

When the annual demand of a product is $$24000$$ units, the $$EOQ$$ (Economic Order Quantity) is $$2000$$ units. If the annual demand is $$48000$$ units the most appropriate $$EOQ$...

Match the property with their units Property $$A.$$ Bulk modulus $$B.$$ Thermal conductivity $$C.$$ Heat transfer coefficient $$D.$$ Heart flow rate Units $$1.$$ $$W/s$$ $$2.$$ $$N...

Biot number signifies

In shell and tube heat exchanger, baffles are mainly used to

Converging passage is used for feeding the liquid molten metal into the mould to

Determine the Merchants constant $$'C'$$ (shear angle relation) for aluminium from the following orthogonal machining data. Rake angle $${35^ \circ }$$ and an uncut chip thickness...

In a shaft with a transverse hole, as the hole to the shaft diameter ratio ___________ (increases / decreases), the torsional stress concentration factor__________ (increases/decre...

Wrinkling is a common defect found in

When there is no room temp change, the total shrinkage allowance on a pattern is INDEPENDENT OF

An object has the shape of cubical box of side $$10cm,$$ with no top cover. The box is placed inside a room whose dimensions are much larger than those of the box. All the five sur...

Most of the metal cutting heat goes into the

A diffuse radiation surface has

A one shell pass, one tube-pass heat exchanger, has counter flow configuration between the shell side and tube side fluids. The total number of tubes within the heat exchanger is $...

For a pinion of $$15$$ teeth, under cutting ____________( increases / decreases) with _______________(increases / decreases ) of pressure angle.

A falk consisting of a cope and drag has the following dimensions: length $$300mm,$$ width $$200mm,$$ and total septh $$200mm$$ (cope height $$50mm$$). A $$150mm\,\, \times \,100mm...

For gas welding a particular job using a neutral oxy-acetylene flame the acetylene consumption was $$10$$ ltrs. The oxygen consumption from the cylinder in liters will be

A strip of thickness $$T$$ $$mm$$ is rolled in a $$2$$ high single pass rolling mill, having roll diameter $$D$$ $$mm,$$ to a final thickness of $$\left( {T - 2\Delta T} \right)mm....

In a Rankine cycle heat is added

Velocity compounded steam turbine known as ___________ (Curtis / Rateau ) turbine uses the principle of converting entire __________ (pressure / velocity) energy before entering th...

Numerically controlled machine tools are better suited for .................. (batch/mass) production, because their setup time is ......... (larger / smaller) in comparison to spe...

Strength to weight ratio for a circuit shaft transmitting power is directly proportional to the

Find the percentage change in cutting speed required to give a $$50\% $$ reduction in tool life (that is required tool life is half of the original tool life ) when the value of th...

Calculate the $$MRR$$ and Specific cutting pressure for the following cutting conditions Work material : steel, Tool material : $$HSS,$$ Depth of cut : $$1.6mm,$$ Feed : $$0.8mm/re...

A $$7MW$$ hydro turbine working under a head of $$10$$ $$m$$ at a rotational speed of $$125$$ $$rpm$$ is to be designed and developed by conducting model tests in a laboratory. Max...

A bush was turned after mounting the same on a mandrel. The mandrel diameter in millimeters is $${40^{\matrix{ { + 0.00} \cr { - 0.05} \cr } }}$$ and bore diameter of bush is $${40...

Match the roling element bearings with the most appropriate loading condition Bearing - type (a)$$\,\,\,\,\,\,$$ Ball bearing (b)$$\,\,\,\,\,\,$$ Roller bearing (c)$$\,\,\,\,\,\,$$...

A milling cutter having $$10$$ teeth is rotating at $$100$$$$rpm$$. The table feed is set at $$50mm$$ per minute. The feed per tooth in $$mm$$ is

For cutting double start screw threads of pitch $$1.0$$ $$mm$$ on a lathe, the thread cutting tool should have a feed rate of