MCQs

Mechanical Engineering MCQs with Explanations

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1631Mechanical EngineeringMedium

The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is________?

Asmaller/bigger depending on capacity

Bequal

Cbigger

Dsmaller

Eunpredictable

Correct answer

C. bigger

Explanation

The correct answer is bigger.

1632Mechanical EngineeringMedium

In accelerated circulation type boiler________?

Awater is converted into steam in one pass without any recirculation

Bheating takes place at bottom and the water supplied at bottom gets converted into the mixture of stdam bubbles and hot water which rise to durm

Cwater is fed under high pressure and high velocity

Dfeed pump is employed to supplement natural circulation in water wall type furnace

Ewater is supplied in drum and through downcomers” located in atmospheric conditon it passes to the water wall and rises to durm in the from of mixture of water and steam

Correct answer

E. water is supplied in drum and through downcomers” located in atmospheric conditon it passes to the water wall and rises to durm in the from of mixture of water and steam

Explanation

The correct answer is water is supplied in drum and through downcomers” located in atmospheric conditon it passes to the water wall and rises to durm in the from of mixture of water and steam.

1633Mechanical EngineeringMedium

Material handling and plant location is analysed by________?

AGnatt chart

Btravel chart

Cbin chart

DEmerson chart

Eactivity chart

Correct answer

B. travel chart

Explanation

The correct answer is travel chart.

1634Mechanical EngineeringMedium

According to Rowan plan, if H = hourly rate, A = actual time and S = standard time, then wages will be________?

AHA + ^^-HA

BHA

CHA + ^^-H

DHA + (S~A) HA

Correct answer

D. HA + (S~A) HA

Explanation

The correct answer is HA + (S~A) HA.

1635Mechanical EngineeringMedium

Which of the following particles is the lightest________?

Aneutron

Bproton

Cnucleus

Delectron

Emeson

Correct answer

D. electron

Explanation

The correct answer is electron.

1636Mechanical EngineeringMedium

Following elements have face-centred cubic structure________?

Aa iron (below 910°C and between 1400 to 1539°C), W

BMg, Zn, Ti, Zr, Br, Cd

Cgamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt

Dall of the above

Enone of the above

Correct answer

C. gamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt

Explanation

The correct answer is gamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt.

1637Mechanical EngineeringMedium

In the crankcase method of scavenging, the air pressure is produced by________?

Anatural aspirator

Bsupercharger

Ccentrifugal pump

Dmovement of engine piston

Ereciprocating pump

Correct answer

D. movement of engine piston

Explanation

The correct answer is movement of engine piston.

1638Mechanical EngineeringMedium

For speed above 3000 km/hour, it is more advantageous to use________?

Aturbo-jet engine

Bpropellers

Cram-jet engine

Drockets

Ehydraulic jet propulsion

Correct answer

C. ram-jet engine

Explanation

The correct answer is ram-jet engine.

1639Mechanical EngineeringMedium

Descripancies of bar chart techniques are________?

Aall of the above

Bconsequential effects of lack in one activity on the finish date

Ceffective monitoring/controlling can’t be done

Dconsequential effects of lack in one activity on omer

Efree time available for an activity can’t be predicted

Correct answer

A. all of the above

Explanation

The correct answer is all of the above.

1640Mechanical EngineeringMedium

Effect of a force on a body depends upon ________?

Adirection

Bposition or line of action

Cnone of the above

Dall of the above

Emagnitude

Correct answer

D. all of the above

Explanation

The correct answer is all of the above.

In accelerated circulation type boiler________?

Awater is converted into steam in one pass without any recirculation

Bheating takes place at bottom and the water supplied at bottom gets converted into the mixture of stdam bubbles and hot water which rise to durm

Cwater is fed under high pressure and high velocity

Dfeed pump is employed to supplement natural circulation in water wall type furnace

Ewater is supplied in drum and through downcomers” located in atmospheric conditon it passes to the water wall and rises to durm in the from of mixture of water and steam

Correct answer

E. water is supplied in drum and through downcomers” located in atmospheric conditon it passes to the water wall and rises to durm in the from of mixture of water and steam

Explanation

The correct answer is water is supplied in drum and through downcomers” located in atmospheric conditon it passes to the water wall and rises to durm in the from of mixture of water and steam.

Following elements have face-centred cubic structure________?

Aa iron (below 910°C and between 1400 to 1539°C), W

BMg, Zn, Ti, Zr, Br, Cd

Cgamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt

Dall of the above

Enone of the above

Correct answer

C. gamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt

Explanation

The correct answer is gamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt.

Descripancies of bar chart techniques are________?

Aall of the above

Bconsequential effects of lack in one activity on the finish date

Ceffective monitoring/controlling can’t be done

Dconsequential effects of lack in one activity on omer

Efree time available for an activity can’t be predicted

Correct answer

A. all of the above

Explanation

The correct answer is all of the above.