C:-Iso-octane and n-hexane
D:-n-heptane and iso-octane
Correct Answer:- Option-D
Question39:-If speed of a centrifugal pump is doubled, then
A:-Power required to operate it is doubled
B:-The volumetric discharge is increased 4 times
C:-The head becomes 4 times as great
D:-Specific speed becomes 4 times
Correct Answer:- Option-C
Question40:-If the depth of a rectangular beam is halved the deflection for a beam carrying a mid point load shall be
A:-Halved
B:-Doubled
:-Four times
D:-Eight times
Correct Answer:- Option-D
Question41:-If Poisson's ration for a material is 0.5, then the elastic modulus for material is
A:-Three times its shear modulus
B:-Four times its shear modulus
C:-Equal to its shear modulus
D:-Indeterminate
Correct Answer:- Option-A
Question42:-Production cost refers to prim cost plus
A:-Factory overheads
-Factory and administration overheads
C:-Factory, administration and sales overheads
D:-Factory, administration and sales overheads and profit
Correct Answer:- Option-A
Question43:-In a CNC program block, NO02 G03 G91 X40 Z40....,G02 and G91 refer to
A:-Circular interpolation in counter clockwise direction and incremental dimension
-Circular interpolation in counter clockwise direction and absolute dimension
C:-Circular interpolation in clockwise direction and incremental dimension
D:-Circular interpolation in clockwise direction and absolute dimension
Correct Answer:- Option-A
Question44:-If the arrival takes place every 10 minutes with a service time of 4 minutes per unit then the mean arrival rate,
mean service rate and the probability that one would have to wait will he respectively
A:-10, 4 and 0.25
B:-0.1, 0.25 and 0.4
C:-10, 0.4 and 0.25
D:-0.1, 0.25 and 0.1
Correct Answer:- Option-B
Question45:-It is required to cut screw threads of 2 mm pitch on a lathe. The lead screw has a pitch of 6 mm. If the spindle
speed is 60 rpm, then the speed of the lead screw will be the material is rigid
A:-10 rpm
B:-120 rpm
2-20 rpm
D:-180 rpm
Correct Answer:- Option-C
Question46:-For adiabatic expansion with friction through a nozzle, the following remains constant
A:-Stagnation enthalpy
B:-Entropy
:-Static enthalpy
D:-Stagnation pressure
Correct Answer:- Option-A

Question47:-A furnace is made of a red brick wall of thickness 0.5 mand conductivity 0.7 W/mk. For the same heat loss and
temperature drop, this can be replaced by a layer of diatomite earth of conductivity 0.14 W/mk and thickness

Correct Answer:- Option-B