Mechanical Engineering Mcqs

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 pres-sures

(D) none of the above

Submitted By: Ali Uppal


Thermal power plant works on______________?

(A) Carnot cycle

(B) Joule cycle

(C) Rankine cycle

(D) Otto cycle

(D) Brayton cycle

Submitted By: Ali Uppal


Kelvin Planck’s law deals with___________________?

(A) conservation of heat

(B) conservation of work

(C) conversion of heat into work

(D) conversion fo work into heat

(D) conservation of mass

Submitted By: Ali Uppal


The first law of thermodynamics is the law of_________________?

(A) conservation of mass

(B) conservation of energy

(C) conservation of momentum

(D) conservation of heat

(D) conservation of temperature

Submitted By: Ali Uppal


Stirling and Ericsson cycles are__________________?

(A) reversible cycles

(B) irreversible cycles

(C) quasi-static cycles

(D) semi-reversible cycles

(D) adiabatic irreversible cycles

Submitted By: Ali Uppal


Reversed joule cycle is called_________________?

(A) Carnot cycle

(B) Rankine cycle

(C) Brayton cycle

(D) Bell Coleman cycle

(D) Dual cycle

Submitted By: Ali Uppal


Which of the following cycles is not a reversible cycle_____________________?

(A) Carnot

(B) Ericsson

(C) Stirling

(D) Joule

(D) none of the above

Submitted By: Ali Uppal


The efficiency of Diesei cycle with decrease in cut off_________________?

(A) increases

(B) decreases

(C) remains unaffected

(D) first increases and then decreases

(D) first decreases and then increases

Submitted By: Ali Uppal


The thermodynamic difference between a Rankine cycle working with saturated steam and the Carnot cycle is that___________________?

(A) carnot cycle can’t work with saturated steam

(B) heat is supplied to water at temperature below the maximum temperature of the cycle

(C) a rankine cycle receives heat at two places

(D) rankine cycle is hypothetical

(D) none of the above

Submitted By: Ali Uppal


The following cycle is used for air craft refrigeration___________________?

(A) Brayton cycle

(B) Joule cycle

(C) Carnot cycle

(D) Bell-Coleman cycle

(D) Reversed-Brayton cycle

Submitted By: Ali Uppal