GATE 1990 Mechanical Engineering
22 questions across 1 session
Manual metal arc welding is to be used for welding two plates each measuring $$800 \times 200 \times 19mm.$$ Given that Length of weld $$\,\,\,\,\,\,\,\,\,\,$$$$\,\,\,\,\,\,\,\,\,\...
The predominant forces acting on an element of fluid in the boundary layer over a flat plate in a uniform parallel stream are:
An iron rod $$\left( {K = 41.5W/mK} \right)$$ of $$15mm$$ diameter and $$160mm$$ long extends out of a hot surface of temp $${150^ \circ }C$$ into environment at $${36^ \circ }C.$$...
Penetration is increased by
When $$1.0\% $$ plain carbon steel is slowly cooled from the molten state to $$740C,$$ the resulting structure will contain
Identify the type of turbo machinery for the following case. Specify the reasons. Power developed $$=430$$ $$kW;$$ Operating head $$=300$$ $$m;$$ Speed $$=600$$ $$rpm.$$
Thermal conductivity is lower for
A double pipe counter flow heat exchanger is to be designed to cool $$12000$$ $$kg/hr$$ of an oil of specific heat $$1.95$$ $$kJ/kgK$$ from $$\,85{}^ \circ C$$ to $$\,55{}^ \circ C...
The process of shot peening increases the fatigue life of steel springs mainly because it results in
In the Rankine cycle when super-heated steam is used:
When initially dry and saturated steam flows through a nozzle, the ratio of actual discharge to calculated discharge is
A tube is orthogonally machined in lathe to reduce its length under the following conditions. Outside diameter of the tube : $$100mm,$$ Inside diameter of the tube $$=96$$ $$mm$$ $...
A power station produces $$500$$ $$MW$$ of power. Assuming a plant thermal efficiency of $$33.3$$ percent, calculate the rate of cooling water flow required in tons per hour, if th...
Most of the metal cutting heat goes into the
At small variations of are length at operating conditions, the manual metal are welding transformer provides nearly
The pressure at the in-gate will be maximum with the gating system
If the longitudinal feed in center-less grinding is expressed by $${V_f} = \pi \,D.\,\,N\,\sin \,\alpha ,\,\,D$$ stands for
In the construction of networks, dummy activities are introduced in order to :
In pool boiling the highest $$HTC$$ occurs in
In small lot production for machining $$T-$$slots on machine tables, it is expected to use
Which one of the following diagrams shows correctly the distribution of transverse shear stress across the depth h of a rectangular beam subjected to varying bending moment along i...
The three - dimensional state of stress at a point is given by: $$$\left[ \sigma \right] = \left[ {\matrix{ {30} & {10} & { - 10} \cr {10} & 0 & {20} \cr { - 10} & {20} & 0 \cr } }...