Mechanical Engineering Objective Questions { Thermodynamics }

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400. Otto cycle consists of following four processes

A. Two isothermals and two isentropics

B. Two isentropics and two constant volumes

C. Two isentropics, one constant volume and one constant pressure

D. Two isentropics and two constant pressures

401. The efficiency of a Carnot engine depends on

A. Working substance

B. Temperatures of source and sink

C. Size of engine

D. Type of fuel fired

402. For same compression ratio and for same heat added

A. Otto cycle is more efficient than Diesel cycle

B. Diesel cycle is more efficient than Otto cycle

C. Efficiency depends on other factors

D. Both Otto and Diesel cycles are equally efficient

403. The efficiency of Carnot cycle is maximum for Tmax + Tmin

B. Reversible engine

C. Petrol engine

D. Steam engine

404. Diesel cycle consists of following four processes

A. Two isothermals and two isentropics

B. Two isentropics and two constant volumes

C. Two isentropics, one constant volume and one constant pressure

D. Two isentropics and two constant pressures

405. A cycle consisting of two adiabatics and two constant pressure processes is known as

B. Ericsson cycle

D. Stirling cycle

406. Reversed joule cycle is called

A. Carnot cycle

B. Rankine cycle

C. Bray-ton cycle

D. Bell Coleman cycle

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