HPCL/BPCL/IOCL Engineering Assistant Model Paper – Mechanical Engineering
1 The temperature of an ideal gas is directly proportional to which of the following?
(a) Average translational kinetic energy of the molecules
(b) Average velocity of the molecules
(c) Average potential energy of the molecules
(d) Average momentum of the molecules
Ans- (a)
2 Materials which can store electrical energy are called
(a) magnetic materials
(b) semi conductors
(c) dielectric materials
(d) super conductors
Ans – (c)
3 ACSR (Aluminium Conductor Steel Reinforced) are used as
(a) over head transmission lines
(b) super conductors
(c) fuse
(d) underground cables
Ans – (a)
4 A brittle material has-
(a) Large plastic zone
(b) No plastic zone
(c) No elastic zone
(d) Very little elastic zone
Answer- (b)
5 The maximum shear strain occurs on-
(a) 90° with principal planes
(b) 45° with principal planes
(c) Principal planes
(d) Independent of the principal planes
Answer- (b)
6 With rise in gas temperature, dynamic viscosity
of most of the gases,
(a) Increases
(b) Decreases
(c) Does not change significantly
(d) None of the above
Answer- (a)
7 If the liquid fuel is highly viscous, the action required for proper burning in boiler is-
(a) Pre-heating
(b) Cooling
(c) Mixing
(d) Freezing
Ans- (a)
8 Moisture, ash content, volatile matter and fixed carbon are measured for coal as part of-
(a) Proximate analysis
(b) Ultimate analysis
(c) Proximate and utlimate analysis
(d) None of the above
Ans- (a)
9 For a Newtonian fluid
(a) Shear stress is proportional to shear strain
(b) Rate of shear stress is proportional to shear strain
(c) Shear stress is proportional to rate of shear strain
(d) Rate of shear stress is proportional to rate of shear strain
Ans- (c)
10 Forecasts used for new product planning, capital expenditures, facility location or expansion, and R&D typically utilize a
(a) short-range time horizon
(b) medium-range time horizon
(c) long-range time horizon
(d) naive method, because there is no data history
(E) all of the above
Ans- (c)
11 If two variables were perfectly correlated, the correlation coefficient r would equal
(a) 0
(b) less than 1
(c) exactly 1
(d) -1 or +1
Ans- (d)
12 The specific speed of a hydro turbine depends on
(a) Actual speed
(b) Head of operation
(c) Output power
(d) Actual speed ,head of operation & output power
Ans- (d)
13 Governor is used with the steam turbine to regulate
(a) Steam temperature
(b) Steam pressure
(c) Power output
(d) Speed
Ans- (d)
14 Increasing the number of periods in a moving average will accomplish greater smoothing, but at the expense of
(a) manager understanding
(b) accuracy
(c) stability
(d) responsiveness to changes
Ans-(d)
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