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## Category : Engineering

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## GATE 2017

Question
A steel bar 20 mm in diameter is turned at a feed of 0.25 min/revolution with a depth of cut of 4 mm. The rotational speed of the work piece is 160 RPM. The material removal rate in cubic millimeter/second  ...
solved 0
Engineering Ishwarya Saro 2 years 1 Answer 253 views 0

## solidification of a cube

Question
A cube shaped casting solidifies in 5 min. The solidification time in minutes for a cube of the same material, which is 8 times heavier than the original casting, will be – (A) 10 (B) 20 (C) 24 (D) 40
solved 0
Engineering Ishwarya Saro 2 years 2 Answers 363 views 0

## GATE 2017

Question
For a ductile material, toughness is a measure of – a) resistance of scratching b) ability to absorb energy up to fracture c) ability to absorb energy till elastic limit d) resistance to indentation
in progress 0
Engineering Ishwarya Saro 2 years 2 Answers 233 views 0

## GATE 2017

Question
In order to have maximum power from a Pelton turbine, the bucket speed must be – a) equal to the jet speed b) equal to half of the jet speed c) equal to twice the jet speed d) independent of the jet speed
in progress 0
Engineering Kamal Kumar 2 years 2 Answers 300 views 0

## Gas turbine

Question
The pressure ratio across a gas turbine (for air, specific heat at constant pressure c_p = 1040 J/kgK and ratio of specific heats γ=1.4) is 10. If the inlet temperature to the turbine is 1200 K and the isentropic efficiency is ...
in progress 0
Engineering Kamal Kumar 2 years 1 Answer 231 views 0

## comparison of two cutting tool

Question
two cutting tools with tool life equations given below are being compared : tool 1 : VT^(0.1) = 150 tool 2: VT^(0.3) = 300 where V is cutting speed in m/minute and T is tool life in minutes. The breakeven cutting speed ...
in progress 0
Engineering Kamal Kumar 2 years 1 Answer 278 views 0

## Work in compression of gas

Question
A mono atomic idea gas (  γ=1.67, molecular weight= 40) is compressed adiabatically from 0.1 MPa, 300 K to 0.2 MPa. The universal gas constant is 8.314 Kj/mol-K. The work of compression of the gas ( in Kj/kg) is (a) 29.7 (b) 19.9 (c) ...
in progress 0
Engineering Kamal Kumar 2 years 2 Answers 200 views 0

## Shear stress in rotating shaft

Question
A motor driving a solid circular steel shaft transmits 40 KW of power at 500 rpm. If the diameter of the shaft is 40 mm, the maximum shear stress in the maximum shear stress in the shaft is _____ Mpa.
in progress 0
Engineering Kamal Kumar 2 years 1 Answer 309 views 0

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