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.Management Sciences
Category: Mechanical Engineering Mcqs
Pick up the wrong statement ?
A. large gas turbines employ axial flow compressors
B. axial flow compressors are more stable than centrifugal type compressors but not as efficient
C. axial flow compressors have high capacity and efficiency
D. axial flow compressors have instability region of operation
E. centrifugal compressors are used mainly on low flow pressure ratio gas turbines
The domestic refrigerator uses following type of compressor ____________________?
A. centrifugal
B. axial
C. miniature sealed unit
D. piston type reciprocating
E. none of the above
Resistance to fatigue of a material is measured by________________?
A. Young’s modulus
B. coefficient of elasticity
C. elastic limit
D. ultimate tensile strength
E. endurance limit
Carnot cycle has maximum efficiency for__________________?
A. reversible engine
B. irreversible engine
C. new engine
D. petrol engine
E. diesel engine
Formation of frost on evaporator in refrigerator ________________?
A. results in loss of heat due to poor heat transfer
B. increases heat transfer rate
C. is immaterial
D. can be avoided by proper design
E. decreases compressor power
Moisture would find its way into insulation by vapour pressure unless it is prevented by __________________ ?
A. high thickness of insulation
B. high vapour pressure
C. less thermal conductivity insulator
D. a vapour seal
E. all of the above
In cross or regular lay ropes_________________?
A. direction of twist of wires in strands is opposite to the direction of twist of strands
B. direction of twist of wires and strands are same
C. wires in two adjacent strands are twisted in opposite direction
D. wires are not twisted
E. none of the above
The fusible plug in small boilers is located ________________?
A. in the drum
B. in the fire tubes
C. above steam dome
D. over the combustion chamber
E. at the inlet of chimney
Specific weight of water in S.I. units is equal to ________________?
A. 1000 N/m3
B. 10000 N/m3
C. 9.81 xlO3 N/m3
D. 9.81 xlO6N/m3
E. 9.81 N/m3
Current assets include_______________?
A. manufacturing plant
B. manufacturing plant and equipment
C. inventories
D. common stock held by the firm
E. all of the above
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