Basic Mechanical Engineering MCQ
Basic Mechanical Engineering MCQ
1-Steels can have maximum percentage of carbon as:
(A) 2 percent
(B) 0.4 percent
(C) 6.67 percent
(D) 3.6 percent
2-Ductility of any material is the property which shows:
(A) Resistance to impact
(B) Resistance to indentation
(C) Ability to undergo large permanent deformations in tension
(D) All of the above
3-Graphite is _______ lubricant
(A) Solid
(B) Liquid
(C) Semi solid
(D) None
4-Pig iron is the form which contains:
(A) Pure iron without any carbon
(B) Iron with 4.0 percent carbon
(C) Iron with 2.0 percent carbon
(D) Iron with no constraint on carbon
5-Usually stronger constituent of a composite is
(A) Matrix
(B) Reinforcement
(C) Both are of equal strength
(D) Fillers
6-Semi-solid lubricant is
(A) Castor oil
(B) Lard oil
(C) Grease
(D) All of the above
7-Ceramics are good _______
(A) Conductors
(B) Insulators
(C) Superconductors
(D) Magnetic materials
8-In polymer composites, polymer acts as a
(A) Matrix
(B) Reinforcement
(C) Interphase
(D) Interface
9-Brass is a solution of molten copper in
(A) Solid zinc
(B) Molten zinc
(C) Gaseous zinc
(D) Molten tin
10-Recrystallization temperature is one:
(A) At which crystals start forming from molten metal when it is cooled
(B) At which new crystals first begin to form from the old deformed one when a strained metal is heated
(C) At which change of allotropic form takes place
(D) At which crystals grow bigger in size
11-Viscosity Index (VI) is a measure for the change of viscosity with change in
(A) Temperature
(B) Pressure
(C) Volume
(D) All of the above
12-Diamond is lustrous because
(A) It is colourless
(B) It is hard
(C) It is pure
(D) Its refractive index is high
13-First law of thermodynamics deals with
(A) Conservation of heat
(B) Conservation of momentum
(C) Conservation of mass
(D) Conservation of energy
14-A process, in which the gas is heated or expanded in such a way that the product of its pressure and volume remains constant, is called
(A) Isothermal process
(B) Isobaric process
(C) Adiabatic process
(D) Polytropic process
15-Which of the following is not a natural abrasive?
(A) Emery
(B) Quartz
(C) Silicon carbide
(D) Sandstone
16-What is the ratio of specific heats of air?
(A) 1.29
(B) 1.40
(C) 1.62
(D) 1.51
17-Which of the following is the characteristic feature of a quasi-static process?
(A) Infinite slowness
(B) Rapidity
(C) Stability
(D) Stationary existence
18-Atmospheric pressure is equal to
(A) 1.013 bar
(B) 101.3 kN/m2
(C) 70 mm of Hg
(D) All of the above
19-Which of the following is not a renewable source of energy?
(A) Solar energy
(B) Tidal energy
(C) Wind energy
(D) Fossil fuels
20-Which of the following is not a thermodynamic property?
(A) Pressure
(B) Temperature
(C) Heat
(D) Specific volume
ANSWERS:
1-(A), 2-(C), 3-(A), 4-(B), 5-(B), 6-(C), 7-(B), 8-(A), 9-(B), 10-(B), 11-(A), 12-(D), 13-(D), 14-(A), 15-(C), 16-(B), 17-(A), 18-(D), 19-(D), 20-(C)