Multiple Choice Questions (MCQ) with Answers on Mechanical Engineering
21-The maximum deflection at the centre of a simply supported beam of length ‘l’ with a uniformly distributed load w/unit length is given by
(A) 5wl3/102EI
(B) 5wl3/384EI
(C) 5wl4/384EI
(D) 5wl4/192EI
22-In which of the following non conventional machining process, the material is removed by using abrasive slurry between the tool and work?
(A) Electrical discharge machining
(B) Electro chemical machining
(C) Ultrasonic machining
(D) Electric discharge grinding
23-The relationship between the tool life (T) in minutes and cutting speed (V) in m/min is given by:
(A) VTn=C
(B) VnT=C
(C) V/Tn=C
(D) Vn/T=C
24-In a lathe, which one of the following is used to hold hollow work piece in machine their external surface:
(A) Chucks
(B) Mandrels
(C) Centres
(D) Lathe dog or Carrier
25-If ‘D’ is the annual demand in units, ‘C’ is the order cost and ‘H’ is the holding cost per unit per year, then the Economic Order Quantity (EOQ) is equal to
(A) (2C/DH)1/2
(B) (2CD/H)1/2
(C) (2CH/D)1/2
(D) (2H/CD)1/2
26-Which one of the following layouts is suitable for continuous production?
(A) Process layout
(B) Product layout
(C) Mixed layout
(D) Static layout
27-A closed system is one in which
(A) Heat and work crosses the boundary of the system but mass dose not crosses the boundary
(B) Both heat and work as well as mass crosses the boundary of the system
(C) Mass crosses the boundary of the system but heat and work does not crosses the boundary
(D) Neither the heat and work nor the mass crosses the boundary of the system
28-In a vapour compression refrigeration system before entering the throttle valve the refrigerant is in the form of
(A) Superheated vapour
(B) Wet vapour
(C) High pressure saturated liquid
(D) Dry vapour
29-In Si system of units, one tonne of refrigerant is taken equivalent to
(A) 210 kJ/min
(B) 2100 kJ/min
(C) 3.5 kW
(D) 35 kW
30-The head against which a centrifugal pump has to work is known as
(A) Static head
(B) Total load
(C) Net positive suction head
(D) Manometric head
ANSWERS:
21-(C), 22-(C), 23-(A), 24-(B), 25-(B), 26-(B), 27-(A), 28-(C), 29-(C), 30-(D)