MCQ(s) of Elements of Mechanical Engineering(2110006) - Summer 2017 Sem-2

• Q. 1  In an isolated system, what transfer?
• (A) mass
(B) energy
• (C) both mass and energy
(D) neither mass nor energy
• (D) neither mass nor energy
• Q. 2  Which of the following is a path function?
• (A) heat
(B) temperature
• (C) pressure
(D) volume
• (A) heat
• Q. 3  Which has the highest calorific value?
• (A) Petrol
(B) Diesel oil
• (C) Alcohol
(D) Benzene
• (A) Petrol
• Q. 4  Choose the incorrect relationship.
• (A) CP + CV = R
(B) CP - CV = R
• (C)
(D) ${C}_{V}=R/\left(\gamma -1\right)$
• (A) CP + CV = R
• Q. 5  Steam coming out of the whistle of pressure cooker is
• (A) Dry and saturated vapour
(B) Wet vapour
• (C) Superheated vapour
(D) Ideal gas
• (C) Superheated vapour
• Q. 6  Superheating of steam is done at constant
• (A) pressure
(B) volume
• (C) temperature
(D) enthalpy
• (A) pressure
• Q. 7  The Otto cycle is also known as
• (A) constant pressure cycle
(B) constant volume cycle
• (C) constant temperature cycle
(D) constant enthalpy cycle
• (B) constant volume cycle
• Q. 8  When heat is added to the water and if its temperature does not change, the heat added is called
• (A) latent heat
(B) isothermal heat
• (C) sensible heat
(D) constant pressure heat
• (A) latent heat
• Q. 9  Which one of the following is vertical boiler?
• (A) Lancashire
(B) Cochran
• (C) Cornish
(D) Locomotive
• (B) Cochran
• Q. 10  Petrol engine work on ________system.
• (A) either spark or compression ignition
(B) spark ignition
• (C) compression ignition
(D) all of the above
• (B) spark ignition
• Q. 11  Scroll compressor is a ______________compressor.
• (A) reciprocating
(B) rotary
• (C) dynamic
• (B) rotary
• Q. 12  Pump cannot be driven by
• (A) electric motor
(B) I.C. Engine
• (C) steam turbine
(D) compressor
• (D) compressor
• Q. 13  Performance parameter for refrigeration system is known as
• (A) efficiency
(B) COP
• (C) effectiveness
(D) energy ratio
• (B) COP
• Q. 14  In VCR cycle, refrigeration effect is produced by
• (A) compressor
(B) condenser
• (C) expander
(D) evaporator
• (D) evaporator