7000+ Mechanical Engineering MCQ for Competitive Exams 2024 - 2025 - 1

Question: 1

The efficiency of superheat Rankine cycle is higher than that of simple Rankine cycle because

(A) the mean temperature of heat addition is higher for superheat cycle

(B) the temperature of steam in the condenser is high

(C) the quality of steam in the condenser is low

(D) the enthalpy of main steam is higher for superheat cycle

Question: 2

Pig iron is

(A) an alloy containing carbon

(B) an alloy in which carbon percentage is low

(C) an open hearth iron very low in carbon, manganese and impurities

(D) the product of the blast furnace and is made by the reduction of iron ore

Question: 3

Which of the following joint is used for pipes carrying water under low pressures?

(A) expansion joint

(B) welded joint

(C) socket joint

(D) adhesive joint

Question: 4

Beams composed of more than one material, rigidly

(A) compound beams

(B) composite beams

(C) determinate beams

(D) indeterminate beams

Question: 5

Which of the following steel is preferred for helical spring?

(A) carbon chrome steel

(B) nickel steel

(C) silico-manganese steel

(D) stainless steel