ans 2
Description : A dash pot consists of a cylinder 10 cm in diameter in which slides a piston 12 cm long having a radial clearance of 1 mm. The cylinder is filled with oil having a viscosity of 1 poise. What will be the resistance offered ... with a velocity of 3 cm/sec a.1090 kg b.100 kg c.10900 kg d.10 kg e.50 kg
Last Answer : c. 10900 kg
Description : hen displacement volume is divided by piston displacement, what will we obtained (a) number of cylinders (b) number of power stroke per minute for all cylinders (c) number of revolution of the crankshaft (engine) (d) number of revolution of crankshaft × number of cylinder
Last Answer : (b) number of power stroke per minute for all cylinders
Description : The accumulation of carbon in a cylinder results in increase of A. clearance volume B. volumetric efficiency C. ignition time D. effective compression ratio
Last Answer : ANSWER : D
Description : In compression ignition (CI) engine, the compression ratio is a. Cylinder volume / Clearance volume b. Swept Volume / Cylinder Volume c. Clearance volume / Cylinder volume d. Cylinder volume / Swept volume (Ans:a)
Last Answer : In two stroke engine there is one power stroke in _____ of crankshaft rotation. a. 90° b. 180° c. 270° d. 360° (Ans:d)
Description : The accumulation of carbon in a cylinder results in increase of a. clearance volume b. volumetric efficiency c. ignition time d. effective compression ratio
Last Answer : ANSWER d. effective compression ratio
Description : What is the formula for compression (rk) ratio of the Otto cycle? a. rk = Volume of cylinder at the beginning of compression / Volume of cylinder at the end of compression b. rk = Volume of cylinder ... c. rk = Volume of cylinder at the end of compression / clearance volume d. none of the above
Last Answer : ANSWER a. rk = Volume of cylinder at the beginning of compression / Volume of cylinder at the end of compression
Description : Piston displacement is the volume displaced by the piston during one stroke and is usually expressed in 1. Cubic meter 2.cubic inches 3. Both of these 4. none of these
Last Answer : <!-- [endif] -->ans-1
Description : Gas is enclosed in a cylinder with a weighted piston as the stop boundary. The gas is heated and expands from a volume of 0.04 m^3 to 0.10 m^3 at a constant pressure of 200kPa.Calculate the work done by the system. A. 8 kJ B. 10 kJ C.12 kJ D.14 kJ Formula: W = p(V2-V1)
Last Answer : 12 kJ
Description : A gas is enclosed in a cylinder with a weighted piston as the top boundary. The gas is heated and expands from a volume of 0.04 m3 to 0.10 m3 at a constant pressure of 200 kPa. Find the work done on the system. a. 5 kJ b. 15 kJ c. 10 kJ d. 12 kJ
Description : A gas is compressed in a cylinder by a movable piston to a volume onehalf its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be (a) 300 Nm (b) 300,000 Nm (c) 30 Nm (d) 3000 Nm (e) 30,000 Nm.
Last Answer : Answer : b
Description : An engine working on air standard Otto cycle has a cylinder diameter of 10 cm and stroke length of 15 cm. The ratio of specific heats for air is 1.4. If the clearance volume is 196.3 cc and the heat supplied per kg of air per ... kg of air is a. 879.1 kJ/ b. 890.2 kJ c. 895.3 kJ d. 973.5 kJ
Last Answer : ANSWER d. 973.5 kJ
Description : For a reciprocating pump, the indicator diagram is the graph between the (A) Discharge and overall efficiency (B) Volume swept by piston for one complete revolution and the pressure in the cylinder (C) Angle swept by the crank pin at any instant and the discharge (D) None of these
Last Answer : (B) Volume swept by piston for one complete revolution and the pressure in the cylinder
Description : At one atmosphere, a cylinder with movable piston contains 2,000 milliliters of gas. If the pressure is increased to 5 atmospheres and the temperature remains unchanged, what is the new volume of the gas? w) 10,000 milliliters x) 400 milliliters y) 1,000 milliliters z) 4,000 milliliters
Last Answer : ANSWER: X -- 400 MILLILITERS
Description : Liquid "X" is at equilibrium with its vapor in a cylinder and piston apparatus. When the volume of the space above the liquid is 50 ml and the temperature 25!, the vapor pressure of "X" is 120 torr. What will the ... 25!C? Some liquid is always present. w) 30 torr x) 60 torr y) 120 torr z) 240 torr
Last Answer : ANSWER: Y -- 120 TORR
Description : Volumetric efficiency of a compressor without clearance volume A. Increases with increase in compression ratio B. Decreases wit increase in compression ratio C. Not dependent upon compression ratio D. Unpredictable
Last Answer : ANSWER : C
Description : The threshing efficiency of thresher depends on a) Cylinder peripheral speed b) Cylinder concave clearance c) Feed rate, moisture content and type of crop d) All are correct
Last Answer : All are correct
Description : Pumping of a corrosive liquid is generally preferred to be done by a __________ pump, as it can be made of a variety of materials including plastics. (A) Piston (B) Gear (C) Positive displacement (D) Sump
Last Answer : (B) Gear
Description : The clearance volume of the air compressor is kept minimum because A. It allows maximum compression to be achieved B. It greatly affects volumetric efficiency C. It results in minimum work D. It permits isothermal compression
Last Answer : ANSWER : B
Description : Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle A. combustion is at constant volume B. expansion and compression are isentropic C. maximum temperature is higher D. heat rejection is lower
Last Answer : Answer: D
Description : The compression of the gas in two or more cylinders in place of a single cylinder compressor a. Single Staging b. Double Staging c. Multistaging d. None of the above
Last Answer : Multistaging
Description : What is the speed of the piston in the cylinder of a petrol engine ?
Last Answer : The speed of the piston in the cylinder of a petrol engine is also the speed of the alternator.
Description : If a master cylinder with a two-square-inch piston travels 1/2 inch how far would the wheel cylinder with one -square-inch piston be moved?
Last Answer : -1
Description : The pressure inside a piston cylinder is a variable of a) Radius b) Plane angle c) Z plane distance d) Constant, not a variable
Last Answer : c) Z plane distance
Description : One mole of nitrogen at 8 bar and 600 K is contained in a piston cylinder arrangement. It is brought to 1 bar isothermally against a resisting pressure of 1 bar. The work done (in Joules) by the gas is (A) 30554 (B) 10373 (C) 4988.4 (D) 4364.9
Last Answer : (B) 10373
Description : Piston-cylinder arrangement of an internal combustion engine in automobile is called _________. 1. Rotary Joints 2. Prismatic Joints 3. Revolute Joints 4. Spherical Joints
Last Answer : 2
Description : The EGT indication on a piston engine is used: a. To control the cooling air shutters b. To monitor the oil temperature c. To assist the pilot to adjust the fuel mixture d. To indicate cylinder head temperature
Last Answer : c. To assist the pilot to adjust the fuel mixture
Description : The piston rod of a hydraulic cylinder exerts an operating force of 10kN. The allowable stress in the cylinder is 45N/mm². Calculate the thickness of the cylinder using Lame's equation. Diameter of the cylinder is 40mm and ... is 10MPa. a) 2.05mm b) 4.2mm c) 5.07mm d) None of the listed
Last Answer : c) 5.07mm
Description : Magnification factor is the ratio of the maximum displacement due to forced vibrations to the deflection due to _______ A Static force B Dynamic force C Torsion D Compression
Last Answer : A Static force
Description : Magnification factor is the ratio of the maximum displacement due to forced vibrations to the deflection due to _______ a) Static force b) Dynamic force c) Torsion d) Compression
Last Answer : a) Static force
Description : Claude process of gas liquefaction employs (A) Merely compression of gas beyond its critical pressure (B) Joule-Thomson expansion cooling (C) Heat exchange with colder stream (D) Adiabatic expansion against a piston or in a turbine
Last Answer : (D) Adiabatic expansion against a piston or in a turbine
Description : If the ratio of curved surface area and total surface area of a cylinder is 1 : 3, then find the volume of cylinder when the height is 2 cm. -Maths 9th
Last Answer : Let the radius and height of the cylinder be r and h, respectively . Given that, Curved surface area / Total surface area = 1/3 ⇒ 2πrh / 2πr(h + r) = 1/3 ⇒ 3h = h + r ⇒ r = 2h = 4cm ∴ volume of cylinder πr2h = π × (4)2 × 2 = 32π cm3
Description : How the net work to drive a compressor and its volumetric efficiency behave with increase in clearance volume ?
Last Answer : Work remains unaltered and volumetric efficiency decreases.
Description : Air standard Otto cycle is more efficient than the diesel cycle for the same (A) Heat addition & compression ratio (B) Heat addition & pressure (C) Compression ratio & pressure (D) Cylinder dimension & rpm
Last Answer : (A) Heat addition & compression ratio
Description : Compare detonation and diesel knock on the basis of (i) Fuel Ignition Temperature (ii) Compression Ratio (iii) Speed (iv) inlet temperature (v) inlet pressure (vi) cylinder wall temperature (vii) cylinder size
Last Answer : Comparison between detonation and diesel knock: Parameter To avoid Detonation in SI Engine To avoid Diesel knock i) Fuel Ignition Temperature High Low ii) Compression Ratio ... Cylinder wall temperature Low High viii) Cylinder size Small Large
Description : Explain the effect of the following engine variables on ignition lag and flame propagation: (i) cylinder size (ii) cylinder wall temperature (iii) compression ratio and (iv) inlet air temperature
Last Answer : (i) Cylinder size - Engine of similar design generally run at the same speed. This is achieved by smaller engine having larger RPM and larger engines having smaller RPM. Due to the same ... all reduces the ignition lag. Pre-increase in the intake temperature and pressure increases the flame speed.
Description : A cylinder contains oxygen at a pressure of 10 atm and a temperature of 300 K. The volume of the cylinder is 10 liters. What is the mass of the oxygen in grams? Molecular weight (MW) of oxygen is 32 g/mole? a. 125.02 b. 130.08 c. 135.05 d. 120.04
Last Answer : 130.08 {(10atm)(10)(32)/(0.0821) (300K)}
Description : Pick out the wrong statement. (A) Gross revenue is that total amount of capital received as a result of the sale of goods or service (B) Net revenue is the total profit remaining ... indicates surplus capital and shows the relationship among total income, costs & profit over the time interval
Last Answer : (C) Working capital turnover ratio = sales/net working capital
Description : The piston of a steam engine moves in S.H.M. The crank rotates at 180 r.p.m. and the stroke length is 2 metres. The linear velocity of the piston when it is at a distance of 1 metre from the centre is a.8.88 m/sec b.16.32 m/sec c.5.88 m/sec d.8.16 m/sec e.Zero
Last Answer : e. Zero
Description : In tractor engine which of the following is a device in which liquid fuel is converted into gaseous fuel? 1. Piston 2. Carburetor 3. Both 1 and 2 4. none of these ans 1
Last Answer : ans 1
Description : The pump is used in power-operated sprayer is: A. Plunger type B. Diaphragm type C. Gear type D. Piston type
Last Answer : Gear type
Description : The ratio of work done per cycle to the stroke volume of the compressor is known as A. Compressor capacity B. Compression ratio C. Compressor efficiency D. Mean effective pressure
Description : Assuming compression is according to the Law PV = C, Calculate the initial volume of the gas at a pressure of 2 bars w/c will occupy a volume of 6m³ when it is compressed to a pressure of 42 Bars. a) 130m³ b) 136m³ c) 120m³ d) 126m³ Formula: P1V1/T1 =P2V2/T2
Last Answer : 126m³
Description : Ashwin purchased a second hand machine for Rs.1 lakh. Over the first year after its purchase. He incurred an expense of Rs.20000 in maintaining it. At the end of the first year he sold it for Rs.80000. Find his ... account of depreciation. a)12.5% profit b)12.5% loss c)11 1/9% profit d)11 1/9% loss
Last Answer : d)11 1/9% loss
Description : While computation of profit in marginal costing A. Total marginal cost is deducted from total sales revenues B. Total marginal cost is added to total sales revenues C. Fixed cost is added to contribution D. None of the above
Last Answer : A. Total marginal cost is deducted from total sales revenues
Description : From the salary of pooja , 40% is deducted as house rent, 20% of rest she spends on children's education and 40% of balance she spends on watching movies. If her savings are Rs.5760/- then hers total salary is: a) 20000 b) 30060 c) 45000 d) 47000 e) 98000
Last Answer : Answer: A Formula: First value = last value×100/(100-p1)×100/(100-p2)× 100/(100-p3) (p=percentage) First value = 5760×100/(100 – 40)×100/(100 – 20)×100/(100 - 40 ) = 5760 × 100/60× 100/80× 100/60 = 5760 × 5/3 × 5/4 × 5/3 = 5760 ×125/36 = 720000/36 = 20000
Description : From the salary of shreya, 15% is deducted as house rent, 15% she spends on children’s education and 20% on watching movies. If her savings are Rs.8450/- then her total salary is: a) 13500 b) 2360 c) 16900 d) 11520 e) 23198
Last Answer : Answer: C She spends = 50% remaining 50% = 8450 Total salary = 8450 × 100 / 50 = 845000 / 50 = 16900
Description : For an engine operating on air standard Otto cycle, the clearance volume is 10% of the swept volume. The specific heat ratio of air is 1.4. The air standard cycle efficiency is a. 38.3 % b. 39.8 % c. 60.2 % d. 61.7 %
Last Answer : ANSWER d. 61.7%
Description : What are the torque settings for Kia 2700 cylinder head and tappet clearance?
Last Answer : Feel Free to Answer